On fully mechanized coal and mechanical equipment selection and improvement

Abstract: The mechanized coal face tunneling face and use a modern high-yield, efficient mine signs. A reasonable choice based on the actual conditions of mechanized excavation face and fully mechanized coal face production machinery and equipment is safe, efficient production of the party. Mining , heading face equipment selection, design, support, use and scientific management is the face of high yield, high assurance.


Keywords:: Digging Machine, mining equipment, model selection, transformation

With the continuous progress of Machinery Industry, China's mechanized tunneling equipment continue to produce, improve and upgrade, and adaptability of fully mechanized equipment also continues to expand, but does not have any a comprehensive excavation machinery courage to "brag" that they can adapt to all geological conditions.


The relevant heading face mechanized equipment selection must be selected to achieve the desired effects fully mechanized excavation face. If the result of selection is the "big horse car," machinery and equipment will result in waste of production capacity, if it is "pony pull carts ", fully mechanized excavation face of the driving speed must not reach expectations.


Thus, according to the coal mines, the mining area, and even the face of the actual situation, rational use of medium and small coal Lane, Rock Lane, Half Coal Lane fully mechanized equipment in order to ensure the driving speed channel, and then take over to ensure that the entire mine needs.


A selection of fully mechanized machinery

Mechanized Digging Machine is the most important driving face of mechanical equipment. Mechanized excavator efficient functioning of the face when driving goal is to achieve the fundamental basis. According to the geological conditions of the mine, select a reasonable Digging Machine, to play fully mechanized Face the largest production capacity and ensure safe production. in matching Digging Machine related equipment, such as the second transport system is fully mechanized excavation face an important guarantee for high productivity and efficiency.


1.1 The principle of selection

1.1.1 comprehensive excavation machinery production capacity of the equipment shall not be less than the face design production capacity of 1.2 times. Selection must face the light of domestic and foreign high yield production capacity of auxiliary system design, the selected device to be able to meet the rapid Driving the need for coordination of fully mechanized equipment to ensure the needs of rapidly advancing face.


1.1.2 Integrated Development and selection of excavation machinery, equipment, special attention should be feasible, but also pay attention to its advanced technology.


1.1.3 The equipment should consider the overall co-ordination with existing equipment, so as not to cause existing equipment idle.


1.1.4 comprehensive excavation machinery equipment construction technology should meet the requirements of rapid excavation.


1.2 The technical requirements for boring machine

1.2.1 tunneling devices, "breaking, loading and transporting" the three functions and supporting system functions supporting non-interference, scraping the trigger with the loading mechanism controlled separately, to avoid scraping pull loading mechanism and transport load is too large causing the phenomenon of death.


1.2.2 Maintenance of boring machine, the hydraulic system must be sealed to prevent contamination of hydraulic oil, to the hydraulic system caused by blockage, leakage. Boring machine method should maximize the use of oil from the suction. Loading mechanism if we adopt the claw wheel, each dial is a separate motor drive applications.


To solve the overheating of hydraulic oil, cooling system must be boring machine operation in real time, and driving the tank must be installed within the cooler. The exposed parts of the fuel tank and hydraulic parts protective devices should be added. Can achieve the speed and movement of the cylinder walking speed manual meta-level speed. in heavy conditions (in case of hard rock) can be reduced by cutting loads slow feed, to cut off the hard rock, reducing downtime. cutting head with world-class technology, design single-pole power large, pick a reasonable layout, rock through fault capability.


1.2.3 Electrical equipment, electrical control of a large capacity circuits, maintenance should be simple. To protect and display integration, automatic fault diagnosis and motion detection, over current, overload, phase, mutual imbalance, leakage, latch, over- pressure and the pilot control system malfunction, can display and control the motor load, running, fault conditions, the initiator system, controlled temperature, and the main control box, easy to detect and locate dealing with problems.


1.2.4 the use of boring machine, the best choice to have the flexibility of the cutting head, easy to pick the top, brush and digging column to help nest, and under the same conditions can be more into a loop, the dynamic flexibility of the machine can be increased.


1.2.5 safety, must have early warning devices and lighting, lighting fixtures reported, and the on-board type power meter of gas. Other mechanized excavation machines must also have the inside and outside the spray device, both sides must have a boring machine and other security facilities, emergency stop button .


1.3 Digging Machine Efficiency

1.3.1 Based on the above analysis, comprehensive excavation machinery in the "two transport system" if using double-sided adhesive tape machine transport can reduce labor intensity, supporting material can also be mechanized transport. Purchase of a half coal boring machine, can be achieved support, driving the integration of rapid excavation one-time full-face, improve work efficiency.


1.3.2 to achieve excavation machinery drilling, cutting, shipping, dust, supporting the integration, we can improve the driving efficiency and achieve the purpose of rapid excavation, mine safety production to meet the needs of various economic indicators ensure full completion of mining , thus ensuring high yield and efficiency throughout the mine.


1.3.3 optional separate power interface unit bolt for bolt rig to power, improve operational efficiency anchorage.


2 mechanized mining equipment for use in the problems and suggestions for improvement 2.1 equipment usage efficiency of mechanized mining equipment, coal mining and general mining is the gun can not be compared, but because of the design and use of improper operation, there are many possible problems, For example: �� hydraulic support care to help boards open welding, �� care to help board members with hydraulic supports the main open solder connections, �� to the difficulties in adjusting hydraulic support, frame and scraper conveyor rely on each other mobility difficulties, �� hard coal feed roller triangle can not do coal mining, �� the first beam and hydraulic support to help recovery after retaining the overall thickness of the planetary head with mutual interference Shearer, �� Shearer planets to shovel coal conveyor head and scraper plate interfere with each other. Links to free Paper Downloads http://www.hi138.com 2.2 Analysis

2.2.1 The design of transport: transport of the head frame and the transition slot with bolt connection, can not form a rigid whole. Transporter in the middle slot with the bottom has some gaps.


Hydraulic support: hydraulic supports the work of the resistance are large, but there is no downside protection, care to help before the beam and the total thickness of the thick, care to help board, stretching over before the beam and jack does not implement linked.


Shearer: Shearer heads the planet too, coal is the artificial way of refueling the fuel.


2.2.2 Machinery and equipment aspects of hydraulic support beam and Shearer before the interference between the first planet, the lag can not be achieved ahead of the moving frame support.


Transport of supporting the former coal mining in central slot width is 750mm, the equipment and transport facilities, coal and transport aircraft first planetary plate gap is too small coal shovel, push the slide with the machine when the planet coal shovel head and transport of coal Board of mutual interference, causing the planet head wear and coal shovel coal cutting board.


2.2.3 the use of mechanical equipment is used to pick type of shearer cutter (U92 cut bottom, bottom punch and is prone to state boards and block coal shovel coal board to lift the entire coal mining, shoveling coal plate tied at the end, deformation of the central slot.


Back into the hydraulic support fluid pressure hose is too long, often crowded planes moving off.


Coal refueling, maintenance poor, anti-wear hydraulic oil pollution, control valve plug, traction systems often fail.


Operation support workers often do not follow normal operating procedures. Shift plus the process of care charged to the taboo, such as anti-aircraft guns, bow and so on. Even worse, before the roof beams and roof beams can not remain parallel to the support, the entire frame force uneven, and the safety valve opening pressure of the jack is the same, the resulting hydraulic prop channeling fluid, structure starting from the local fatigue, and cause damage to the hydraulic support.


2.3 Improvement

2.3.1 installation of a pump, the shearer's conversion to self-priming fuel.


2.3.2 frame shift, the nursing board to help, stretching back before the beam, pushing slide, the nursing board to help, telescopic steel girders. Care to help board, stretching over before the jack beam and interact.


2.3.3 the approval of a hydraulic jack stand to help protect the safety valve opening pressure, support and help each other to do the connecting rod pin replacement for the greater stiffness of joints.


2.3.4 transport trough the transition off a connection using dumbbells.


2.3.5 Simulation of Four-bar linkage increases the bottom of a side push device to prevent the hydraulic support sideslip.


2.3.6 in the coal shed to increase the fuel filter cloth.


2.3.7 coal cutting drum floor as little as possible to reduce the shovel load of coal board. If the resultant difficulty in advancing conveyor and immediately stop working see reason, solve problems and were pushed out of plumb.


2.3.8 stent into the hydraulic fluid hose back to bondage in a fixed position lifting and protection.


2.3.9 Move aircraft, the absence of exceptional circumstances to delay support.


2.3.10 three combined effects of hydraulic supports push synchronization to ensure that slip.


2.3.11-site classes to enhance the training of the captain and operating workers, coal, machine drivers, supporting operators and maintenance workers must be familiar with the rules to be "four to understand the four."

3 Conclusion

Fully mechanized, mechanized excavation face is a symbol of modern and efficient mine. Feasible, high-performance integrated and mechanized equipment is safety, efficient production of the party. Fully mechanized equipment selection, design, support, use and scientific management the successful completion of various economic indicators are guaranteed. pro-active use of various means to identify and solve problems fully mechanized mining systems to play the potential of mining equipment, is to achieve high yield and efficiency longwall face the fundamental guarantee. reposted elsewhere Free Download Center http://www.hi138.com Papers