This modification of the SEU system was developed for tunneling machines of selective action of the KP series, manufactured by Kopeysk Machine-Building Plant JSC.
The SES M2D system is the result of invested efforts and vast experience in operating systems of previous generations.
At the moment, the system is serially equipped at the plant of JSC "KMZ"
- Roadheader KP21-14
- Roadheader KP150
- Roadheader KP220
The complete set of control equipment includes all the necessary subsystems, control units, control panels and actuators to provide control of power electrohydraulics, power supply and protection of various components and elements of the mining machine.
Significant emphasis during development was placed not only on the safety of the machine, but also on the safety of the operating personnel and ensuring comfortable operation.
As a result, the efficiency of tunneling operations increases, including due to equipment downtime during unscheduled repairs.
The electro-hydraulic control system of the SEU "M2D" provides the following functions, which will be described in more detail below.
- Harvester radio remote control
- Combine harvester control from the control panel located at the driver's workplace
- Diagnostics of the presence of malfunctions in individual elements of the system
- Microprocessor protection and control of combine motors
- A set of sensors for monitoring a wide range combine harvester parameters
- System for data transmission to the surface, visualization and generation of analytical reports at the workplace of the mining dispatcher and computers of the management staff
- Pre-start warning and emergency sound signaling
- Other
1. Control panel PU2 SEU2.10.00.000-01
The control panel PU2 is a microcontroller with a 7-inch full-graphic display, a reliable keyboard with opto-isolated contact and non-volatile memory. PU2 is installed in a specialized cassette, which reliably protects it from mechanical damage, simplifies and increases the reliability of installation.
PU2 in the system of SEU "M2RD" performs the following functions:
- control of separate executive devices of the combine from the driver's workplace;
- displaying the parameters of the system and displaying operational information on the display;
- control and transmission of information about the state of the EMS system;
- diagnosing the presence of faults in individual elements of the system;
- event log entry, incl. in black box mode
2. A set of equipment for remote radio control of the KADRUK combine
Equipment "KADRUK" provides remote radio control of the harvester in the line of sight. The body of the Radio Remote Control RPDU AUK75D.70.200.000 is made of durable fiberglass. The combination of joysticks and a push-button keyboard provide convenient and intuitive control of the combines' actuators.
The RPDU battery is charged directly in the mine without lifting “to the surface” when the RPDU is connected by a cable jumper to PU2. At the same time, the RPDU continues to function as a wired remote control.
Also, to improve the safety of mining operations, the RPDU is equipped with an automatic general emergency “stop” function in case of a fall.
3. Set of equipment for installation in the Control Station
The kit includes auxiliary equipment of the system, which performs switching of individual functional units and their control, collection of information from various sensors, power control of electrohydro valves, power supply to the system, as well as MP1 drive monitors.
MP1 drive monitor
MP1 drive monitor is a microprocessor-based device for control, monitoring and protection of the electric motor. MP1 equipped proximity sensor current and is connected with the central microcontroller (Control panel PU2) via the CAN digital interface. The MP1 drive monitor has the ability to monitor the health of the vacuum contactor control unit circuit by switching the “afterburner” current modes to the “holding” current, which is necessary for vacuum contactors with electromechanical mode control.
Key features of MP1 drive monitor:
- control of the technological overload current of the electric motor with the formation of a "reverse-current-time" protective characteristic (settings for t.overload, t.overload are set from the system menu, stored in the non-volatile memory of the control panel PU2);
- shutdown of the electric motor in case of technological overload;
- saving in the "Black Box" in real time information about the motor currents reaching the values of the overload settings and the values of the overload currents during the period of the protective characteristic;
- control of the overturning current (or “jamming”) of the electric motor with the formation of a protective characteristic and turning off the electric motor in the event of a “turnover” or “jamming”;
- control of the starting current with the preservation of the "profile of the starting current" in the memory. Determination of the completed start for various conditions of starting the electric motor and switching off the electric motor before the "failed" start;
- control of the short circuit current at the outgoing connection (in the load) with the electric motor switched off in the event of a "short circuit";
- control of 3-phase voltage (660/1140V) in the load, control of phase imbalance in the load. In the event of an "inadmissible phase imbalance" - alarm and shutdown of the electric motor;
- monitoring the status of temperature sensors (thermal relays or posistors) built into the stator windings and (or) bearing assemblies of electric motors, with automatic control of the closed state of the line to the temperature sensor and turning off the electric motor in the event of overheating of the winding and bearings;
- measurement of the insulation resistance of the outgoing connection to the contactor (power cable and stator winding) before switching on the load (electric motor) with the measured value of the insulation resistance (30kΩ ... .5MΩ) stored in the module memory for automatic comparison with the value “from start to start” (prediction of resistance changes isolation for PPR);
- protection against "frequent starts" in accordance with the restrictions imposed in the specifications for electric motors;
- automatic calculation of the active power of the drive electric motor, taking into account the calculation and storage of energy consumption kWh (data transfer to the main control panel PU2 of the electro-hydraulic control system of the SEU). Accounting for the operating time of the drive (“motor hours”, the number of start-up cycles, including those with maximum load) with fixing these parameters in the non-volatile memory of the MP and the SEU system;
- control of vacuum contactor serviceability with automatic checking of time intervals of switching on (including in the “forcing” mode) and switching off according to the actual working out of the auxiliary contacts and according to the signals of the current sensors (in all three phases);
- detection of attempts to block the vacuum contactor "mechanically" with the preservation of this event in the ECS system;
- detection of malfunctions of vacuum contactor control units responsible for switching from the "Forsage" mode to the "Hold" mode by measuring the currents of the forced mode and the hold mode (relevant for vacuum contactors that have mode control by auxiliary contact, the so-called "electromechanical circuit switching").
4. Harvester electrohydraulic control kit
Designed for electro-hydraulic control of the power hydraulics of tunneling machine mechanisms: the executive body (moving, telescoping), feeder, machine running, conveyor, supports, support hoist, loading.
In the SEU “M2D” System, the EGR SEU.14.00.000 Electrohydraulic Distributor is used as a control electro-hydraulic valve, which is a control electro-hydraulic block for 2 commands. The SEU "M2D" serially supplied to roadheaders KP21-02, KP21-04, KP21-150, KP220 includes a set of 14 electrohydraulic distributors.
The EGR is controlled remotely using the Control Panel PU2 or other control device, incl. according to a given program and algorithm in automatic mode, or in manual mode, using the lever for moving the electromagnet spool.
5. Equipment for monitoring automatic transmission parameters and radio monitoring equipment
It is a set of digital sensors for collecting data on the state of roadheader elements:
- pressure monitoring in hydraulic lines;
- monitoring the position of the executive body;
- temperature monitoring of gearboxes, oil and other elements;
- oil level monitoring in gearboxes and in the oil tank;
- monitoring the concentration of methane and other gases;
- other.
The system can use both "classic" wired sensors and radio monitoring equipment, which is a set of wireless sensors that transmit measurement results via a radio channel to a readout device installed on the combine (radio modem - Stationary Radio Frequency Unit URChS-JN).
Advantages of radio monitoring equipment:
- Ability to transmit data over a radio channel at a distance of up to 30m;
- Absence external source power supply, availability of battery support;
- The absence of cables and connectors, which allows you to place equipment components in hard-to-reach places, protects against a break in the communication line and increases noise immunity;
- Full diagnostic control, which excludes "sensor imitation";
- High resistance to overloads, dynamic pressure drops and vibrations due to the design features of the sensors;
- Significant simplification of installation due to the absence of cable jumpers;
DDR1 radio pressure sensor
All radio sensors have built-in battery power. Battery life: 9 months.
One radio modem (Unit radio frequency stationary URChS-JN) collects data from 16 radio sensors. Data transfer from the radio modem to the controller (Control panel PU2) is carried out via the digital interface MODBUS (RS485).
The results of industrial studies of the reliability of mining machines of selective action
A.S. Nosenko, A.A. Domnitsky, I.A. Nosenko
Shakhty Institute (branch) SRSPU (NPI) named after M.I. Platova
Abstract: The article presents the results of production studies of the reliability of KP21 roadheaders manufactured by OAO Kopeysk Machine-Building Plant in the conditions of the Almaznaya mine of Gukovugol Management Company during development workings with a cross section of up to 16 m2 with a hardness of host rocks up to 7 units. according to the scale of prof. M.M. Protodyakonova. With the help of the mathematical apparatus, the mathematical expectation, variance, standard deviation, coefficient of variation, etc. are established.
Keywords Keywords: tunneling machine of selective action, reliability, operating time to failure.
The selective tunneling machine KP21 (Fig. 1) of domestic production is used for high-speed excavation with a cross section of up to 30 m, for rocks with a strength of 7-10 units. on the scale of Professor M.M. Protodyakonova. It is used, in particular, in the construction of transport tunnels. The difference between the model under consideration and previously known ones is the use of a hydraulic drive, which is very important.
In the Eastern Donbass region, the KP21 roadheader was used for the first time by Gukovugol when hauling roadway No. 109, 1200 meters long, at the Almaznaya mine.
Based on the "Methodology for organizing the collection and analysis of information on the performance of mining equipment in the conditions of the Russian Donbass" by the Shakhty Institute (branch) of the SRSPU (NPI) named after M.I. Platov together with JSC "KMZ" conducted a production study to obtain information about its operation.
Observations were carried out for 20 months. During the reporting period, 2
workings with a length of 2200 meters (30 thousand m) and 1200 meters (17450 m). The penetration rate was 252 m/month. In general, 100 failures were identified for the combine.
Rice. 1. - Roadheader KP21
The most serious ones include: detachment of the heads of the bolts for fastening the crown brake flanges, failure of the bearings of the gears of the raking paws and the working body, breakage of the conveyor star, wear of the sheets of the rotary part of the conveyor.
During the operation of the combine, roofing rocks with a strength of up to 12 units were undercut, which affected the resource of the combine. The distribution of the number of failures over the period of operation of the combine is shown in the diagram (Fig. 2).
As a result of the analysis of the obtained data, the time to failure was determined, as well as a list of parts and assemblies that affect the reliability of the combine (table No. 1).
The results of the research formed the basis for further improvement of tunneling machines of this size. Reinforced fastening of the brakes of the cutting body. A new design of the raking part has been developed, in which the raking paws are replaced by corrugated disks. The layout of the undercarriage gearboxes has been changed. Options for using a combine harvester together with a hopper reloader are considered.
Rice. 2. - Distribution of the number of failures of the combine in parts
Table No. 1 Indicators of reliability of the combine harvester KP21 factory. No. 20
Assembly Out of order Quantity Operating time up to
unit node of failures 3 failures, m
Working body Reducer: bearing No. 2 14000
Brake clutches 4 7500
Electric motor 3 9000
Loading Reducer:
organ bearing No. 7612, 8 6000
pinion shaft No. 0202087,
conical wheel 2 27500
№ 0202009 2 24000
Backstage bearing 1 29000
Conveyor Reducer:
bearing №7610 3 9000
Star 2PNB2.13.86.220-01 2 20000
Scraper chain 2 19000
Stava sheets 6 12000
Chassis Track chain 3 19000
Hydraulic drive Telescope jack 6 19000
Sleeve high pressure 9 21000
Metal tubes 5 12000
Hydraulic motor 1 27000
The obtained statistical parameters are used to calculate random values of time to failure. The operating conditions of combines are given in table No. 2.
Table number 2
Working conditions of harvesters KP21
No. Serial No. Production No. Production Observation period, months Dimensions of the working in the rough / in the 2nd light, m Fortress of the rocks, units.
1 KP-21 Head. No. 20 Conveyor drift No. 109 7 15.9/13.5 2 - 5/7
2 KP-21 Head. No. 34 Conveyor drift No. 113 20 16.0/15.2 2 - 5/7
Failures corresponding to individual nodes of each of the investigated combine are shown in Figure 3.
As can be seen from the diagrams, a significant amount of failures belongs to the reloader and amounts to 40%. The weakest elements in terms of reliability are the chain rollers (80%) and the drive star (90%). The weak point of the loading body is the gearbox (85%). In the chassis, the main failures are tracks (90%). The working body has an unfinished hydraulic jack and a telescope boom brake (70%).
Statistical analysis of the obtained results of observations of the efficiency of combine harvesters KP21 was carried out in accordance with the recommendations.
Based on the experimental data obtained, a statistical series of random variables (CV) was formed from 83 implementations of X time to failure, while Xtp = 23.0 r.m, Xmax = 177.4 r.m. In this case A1 = 10; k = 18.
For each interval calculated: n - the number of values of random
values that fell into the interval: w / n - frequency, ^ - - accumulated
frequency, p / pL1 - empirical probability density, p.m-1.
Rice. 3. - Distribution of failures by parts of tunneling machines KP-21. a) - harvester KP-21 No. 20; b) - harvester KP-21 No. 34; 1 - executive body, 2 - raking part, 3 - conveyor, 4 - support lifter, 5 - running gear.
As a result, the values of the statistical standard deviation of SW were calculated: cx" = 32.2 p.m and the coefficient of variation y/ = 0.79.
Figure 4 shows a diagram of the SW distribution density. In the case when the form of the theoretical distribution function is not known,
the diagram serves as the basis for determining the theoretical distribution function.
Rice. 4. - Histogram of exponential distribution
/ (X) \u003d 0.025 e "" CB time to failure
As a result of processing the obtained results, it was found that the random values of the time to failure of X tunneling machines obey the exponential distribution law.
The probability density of a random variable subject to an exponential distribution law is described by the expression:
Taking the values mx = 41 lm as the mathematical expectation, we get / (X) = 0.025 e -0 "025X.
As a result of the studies and calculations, a leveling distribution curve was constructed (Figure 6), which is a graph of the theoretical function /(X).
To establish the correspondence of the put forward hypothesis to the statistical materials, K. Pearson's goodness-of-fit criterion x was used, the value of which is calculated by the formula:
where k is the number of C intervals, ni is the number of SW values in the i-th interval, n is the total number of received SW values, pi is the theoretical probability of SW falling into the i-th interval.
Rice. 5. - Graph of the theoretical function f (X) \u003d 0.0244-e - "
The probability p=0.01 obtained as a result of calculations is sufficient (p<0,1). Таким образом, считаем, что экспериментальные данные удовлетворяют принятому закону распределения СВ.
Literature
1. Nosenko A.S., Domnitsky A.A., Kargin R.V., Shemshura E.A. On the issue of choosing sets of equipment for the construction of transport tunnels using a combine method // Roads and bridges: Sat. scientific tr. / FGBU "Rosdornia". M., 2014. No. 32/2. pp. 40-54.
2. Khazanovich G.Sh., Lyashenko Yu.M., Nosenko A.S., Ostanovsky A.A., Nikitin E.V. Development of hydroficated loading and transport
modules of mining machines. // Scientific and technical problems of the construction of vertical shafts, near-shaft yards, horizontal and inclined workings: Sat. scientific tr. / JSC Rostovshakhtostroy, Novocherk. state tech. un-t. Novocherkassk: NGTU, 1998, pp. 159-164.
3. Nosenko A.S., Kargin R.V., Khazanovich V.G., Nosenko V.V. Development of hydroficated modules of loading and transport systems. // Mining equipment and electromechanics. 2009. No. 4. pp. 13-16.
4. Nosenko A.S. Work processes, parameters and efficiency of mine loaders with hydraulic drives: dis. ... Dr. tech. Sciences: 05.05.06. Novocherkassk, 2000. 279 p.
5. Nosenko A.S., Khazanovich V.G., Nosenko V.V., Shemshura E.A. Selection of equipment sets for development workings based on actual reliability indicators // Mining equipment and electromechanics. 2009. No. 7. pp. 8-11.
6. Shemshura E.A. Ways of optimizing the system of operation of mining equipment// Engineering Bulletin of the Don, 2013. No. 4. URL: ivdon.ru/magazine/archive/n4y2013/2001.
7. Klyuchnikova O.V., Shapovalova A.G., Tsybulskaya A.A. Basic principles for choosing the type and number of construction machines for the integrated production of works//Engineering Bulletin of the Don, 2013, No. 4 URL: ivdon.ru/magazine/archive/n4y2013/2064.
8. Patent No. 2108954 RF, MKI V65025/08. Conveyor for transportation of loose and lumpy materials / G.Sh. Khazanovich, A.S. Nosenko, Yu.M. Lyashenko, R.V. Kargin. - Appl. 01/31/96; Published 04/20/98; Bull. No. 11.
9. Khazanovich G.Sh., Kargin R.V., Nosenko A.S. Researches of a tunneling loader with a variable height of conveying
elements. // Mining information and analytical bulletin (scientific and technical journal). 2001. No. 11. pp. 204-207.
11. Agreement on Main. International Traffic Arteries (AGR) ECE/TRANS/SC. 1/384 14 March 2008. URL: unece.org/fileadmin/DAM/trans/conventn/ECE-TRANS-SC1-384e.pdf.
1. Nosenko A.S., Domnickij A.A., Kargin R.V., Shemshura E.A. Dorogi i mosty: trudy FGBU "Rosdornii". Moscow, 2014. No. 32/2. pp. 40-54.
2. Hazanovich G.Sh., Ljashenko Ju.M., Nosenko A.S., Ostanovskij A.A., Nikitin E.V. Nauchno-tehnicheskie problemystroitel "stva vertikal" nyh stvolov, okolostvol "nyh dvorov, gorizontal" nyh i naklonnyh vyrabotok: trudy. Novocherkassk: NGTU, 1998. Pp. 159-164.
3. Nosenko A.S., Kargin R.V., Hazanovich V.G., Nosenko V.V. Mining Equipment and Electromechanics. 2009. No. 4. pp. 13-16.
4. Nosenko A.S. Rabochie processy, parametry i jeffektivnost "shahtnyh pogruzochnyh mashin s gidravlicheskimi privodami : dis. ... d-r tehn. nauk: 05.05.06. Novocherkassk, 2000. 279 p.
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7. Kljuchnikova O.V., Shapovalova A.G., Cybul "skaja A.A. Inzenernyj vestnik Dona (Rus), 2013, No. 4 URL: ivdon.ru/magazine/archive/n4y2013/2064.
8. Patent No. 2108954 RF, MKI V65G25/08. Konvejer dlja transportirovanija sypuchih i kuskovyh materialov. G.Sh. Hazanovich, A.S. Nosenko, Ju.M. Ljashenko, R.V. Kargin-Zajavl.31.01.96; 0publ.20.04.98; Bjul. No. 11.
9. Hazanovich G.Sh., Kargin R.V., Nosenko A.S. Mining informational and analytical bulletin (scientific and technical journal). 2001. No. 11. pp. 204-207.
10. Directive 2004/54/EC of the European Parliament and of the Council of 29 April 2004 on minimum safety requirements for tunnels in the Trans-European Road Network URL: bmvit.gv.at/verkehr/strasse/tunnel/downloads/ EURL_200454EGvom762004en .pdf.
11. Agreement on Main. International Traffic Arteries (AGR)ECE/TRANS/SC.1/384 14 March 2008. URL: unece.org/fileadmin/DAM/trans/conventn/ECE-TRANS-SC1-384e.pdf.
Completion of the first stage of structural transformations in the mining industry of the Russian Federation is characterized by a change in the formation of its financial resources, now this occurs exclusively through the sale of industry products.
The period of a long decline in production volumes in the course of the restructuring of the industry has remained in the past; in recent years, one can observe a clear trend in the growth of mining, and changes for the better in the technical and economic indicators of the development of the mining industry. The Government of the country adopted the "Energy Strategy
Russia for the period up to 2020”, which set the task of increasing the volume of coal production to 410-450 million tons per year and increasing the share of coal in electricity generation from 34 to 44%.
In order to fulfill this strategic task by the specified deadline, it is necessary to significantly increase the production capacities of enterprises in the industry.
This can be achieved through the modernization of existing enterprises, as well as the construction of new ones. At the same time, the Government Program provides for the increase in capacity until 2010 through technical renovation, and the period 2011-2020. should be characterized by a fundamental change in the technical level of the production process itself.
As best foreign experience shows, high performance in coal mining can be achieved by concentrating production at promising mines. This process is based on the technical re-equipment of treatment facilities, which leads to major changes in the preparatory work.
And this means that, first of all, such events should affect the most progressive combine method. Today, combine driving at the leading coal enterprises of Kuzbass covers up to 98% of the total scope of work.
In the fleet of mining equipment of the coal industry of the Russian Federation, roadheaders number up to 400 units, of which about 250 are located in Kuzbass. The bulk of the harvesters are GPKS type manufactured by the Kopeysk Machine-Building Plant. Analyzing the state of tunneling equipment, one can state a steady decline in the technical level of the fleet of machines.
The wear and tear of combines at the major coal companies is a warning sign of possible failures in the face of an ever-increasing volume of preparatory work.
Roadheader GPKS
Produced by the Kopeysk Machine-Building Plant. Its purpose is mechanized breaking and loading of rock mass during horizontal and inclined mine workings of coal and rock. Combine 1GPKS-00 in the basic model was intended for horizontal and inclined workings with a slope of up to ± 12°. On the latest modifications of the harvester, devices are already provided that can hold the harvester on slopes up to ± 25 °.
The fleet of roadheaders in the Russian coal industry is mainly equipped with combines of the GPKS model, in particular, in Kuzbass they are up to 97% of the total number of combines.
Tunneling machine P 110
Combine with selective action, has a boom working body, the combine is used for mechanized destruction with subsequent shipment of rock mass. It is used when it is necessary to perform an arched, trapezoidal or rectangular working with a cross-sectional area from 7 to 25 m2. Sinking can be performed with a slope of ±12° in coal or mixed face with a maximum rock strength of 95 MPa (f=7) and an abrasiveness of about 15 mg in mines where there is a danger of gas contamination and dust.
Roadheader KP 21
Produced by the Kopeysk Machine-Building Plant since 2000, over the past period, only positive reviews have been received about its work. His excellent work was appreciated both in Russia and in foreign countries. Roadheaders KP21 are designed for mechanization of destruction and subsequent shipment of rock mass when horizontal and inclined mine workings are performed.
The KP21 harvester has been presented at a number of international exhibitions and has worthy awards. As one of the best exhibits, he was awarded a diploma and a medal at an exhibition held in June last year in Novokuznetsk.
OJSC "KMZ" and a large Iranian company "Sabir" have established productive cooperation, in March last year, fulfilling the order of this company, a batch of two roadheaders KP21 was manufactured and sent to Iran.
Roadheader KSP 32
Roadheaders of medium series KSP-32 are intended for mechanized destruction and subsequent shipment of rock mass from the place of horizontal and inclined mine workings up to ±12 degrees.
The cross section of workings can reach up to 33 square meters. m with coal sinking and mixed slaughter. It is allowed to work in conditions with a tensile strength of the destroyed rock up to 95 MPa (f = 8) and an abrasiveness up to 15 mg in mines where there is a danger of gas pollution (methane) and coal dust.
Roadheader KSP-32 is controlled from a portable remote control. The harvester was designed and manufactured in 1998 at the Yasinovatsky Mashzavod enterprise in Donetsk.
Roadheader KPD
It is intended for the destruction of rock, with subsequent cleaning and transportation of the destroyed rock mass during the excavation of development workings. The cross section of workings in shape can be arched, trapezoidal and rectangular in size from 11 to 25 m2.
The design features that the harvester has are an arrow-shaped telescopic type of the executive body, on which the axis of transverse rotation, this device allows you to effectively destroy rocks and at the same time ensure a stable position of the harvester;
it is possible to install electric motors of different power on the executive body, which makes it possible, depending on the strength of the destroyed rocks, to choose the most cost-effective cutting mode;
the loading body, made in the form of rowing stars, shows a high intensity of loading, it is possible to work effectively in flooded workings.
Roadheader EBZ 160
It is used for work in mine workings for coal, for mixed slaughter, they are also used in tunneling. When driving tunnels and destroying coal seams, the most suitable conditions for a combine are considered to be rock hardness up to 75 MPa.
Under such conditions, the harvester shows the highest results in cutting, loading and transporting rocks. The tunneling machine has an excellent layout that provides a low center of gravity, a convenient control system, and it works reliably in uplift.
Chinese tunneling machines
In Ukraine, the Donetsk company DTEK and the Chinese SANY Heavy Equipment Co, Ltd (China) signed a memorandum in which they expressed mutual understanding and intentions to supply Ukraine with the latest mining equipment and coal mining technologies. The signed document also determined the priority areas of cooperation, which will consist in the supply of equipment and technologies, the procedure for providing warranty and maintenance services was agreed. By 2014, it is planned to purchase clearing equipment and several dozen units of tunneling machines.
At a press conference, a representative of SANY Heavy Equipment emphasized that several Chinese tunneling machines are already working at the mines of the Donbass company, and they show good results in the conditions of Donbass.
Speaking at the same press conference on behalf of DTEK's directorate, Andrey Smirnov explained that along with the purchase of domestic equipment, given the significant increase in coal production, DTEK's directorate decided to purchase Chinese tunneling machines. A. Smirnov explained this decision by the fact that the equipment planned for purchase is distinguished by reliability, safety and a rather high degree of computerization, which is not the case for domestic combines. The resource declared by the Chinese manufacturer for its equipment is 30-50% higher than that of domestic harvesters, and the warranty period is 20 months, which shows how confident Chinese manufacturers are in the quality of their machines.
Roadheader JOY
Beginning in 2005, SUEK's mines began to receive new JOY tunneling machines from Great Britain. This combine model was designed specifically for work in the Kuzbass mines.
The combine is equipped with semi-automatic drilling rigs of the HFX type, which made it possible to abandon the primitive method of drilling with manual rigs and thereby increase the level of work safety. Since 2008, dust extraction systems have appeared on new combines, which created more comfortable conditions for combine operators.
The JOY tunneling machine allows the company to increase the pace of work in mine workings by three to four times compared to the average per team. In the future, equipment of this class will make it possible to increase the level of preparation of the clearing front - up to 1,000 meters per brigade per month.
Roadheader KP25
The roadheader KP25 is designed for mechanization of breaking and loading of rock mass during horizontal and inclined workings of ±12°. improving working conditions at the driver’s workplace. The use of hydraulic motors as a drive for the undercarriage and feeder provides convenience and safety in maintenance and reliability. maintenance of the hydraulic system. There is no work on the construction of lining convenient and safe. The combine can be dismantled into component parts that are convenient for descending into the mine and transporting through mine workings.
Specifications
|
Technical performance: |
|
| - for coal, m3/min (t/min) | 2,4 |
| - by breed STszh<100МПа, м3/мин | 0,2...0,3 |
| Specific pressure on the soil, MPa | 0,12 |
|
Chassis: |
|
| - drive unit |
hydraulic |
| - travel speed, m3/min | 6 |
| - pulling force, t | 36 |
|
Executive limit: |
|
| - cutting speed, m/s | 2 |
| - bit rotation frequency, min-1 | 50 |
|
Hydraulic system |
|
| - maximum pressure in the hydraulic system, MPa | |
| - working fluid | industrial sectional oil |
| - hydraulic distributors | manually operated |
|
Feeder |
|
| - drive unit | electric |
| - number of paw swings, min-1 | 46 |
| - feeder width, mm minimum | 2200 |
| - feeder width, mm maximum | 3200 |
|
Irrigation system |
|
| - working pressure, MPa | 1,5 |
| - maximum flow, l/min | 150 |
|
Conveyor |
|
| 1,0 | |
| - chute width, mm | 550 |
|
Conveyor |
|
| - scraper chain speed, m/s | 1,0 |
| - chute width, mm | 550 |
|
electrical equipment |
|
| - voltage of power circuits, V | 660
|
| - total power of electric motors, kW | 216,5 |
| - drive power, kW of the executive body | 196,5 |
| - feeder | 110/55 |
| - conveyor | 30 |
| - pumping station | 55 |
| Harvester weight, t no more | 40 |
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