Safe and efficient excavation method and device of shield tunneling in high gas outburst coal seam
A technology of gas outburst and shield tunneling, which is applied in the directions of safety devices, gas discharge, earthwork drilling, etc., can solve the problems of not considering drilling for gas drainage, and the inability to use high gas outburst coal seams, so as to ensure the succession of mining and solve the problems of mining Replacing tense issues, wide-ranging effects
Active Publication Date: 2019-10-11
CHINA UNIV OF MINING & TECH
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Problems solved by technology
The traditional TBM tunnel boring machine and shield machine are supported by prefabricated concrete segments, without considering the gas drainage from the coal wall next to the roadway after the tunneling, and the deformation of the roadway affected by mining in the later stage.
Therefore, traditional TBM tunnel boring machines and shield machines cannot be directly used in high gas outburst coal seams
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[0025] An embodiment of the present invention is further described below in conjunction with accompanying drawing:
[0026] Such as figure 1 As shown, the high gas outburst coal seam shield safe and efficient excavation device of the present invention includes excavation system, propulsion system, drainage system, ventilation system 14 and console 23, and also includes anti-outburst shield casing, support protection system, gas Drainage system and foam dust-proof and explosion-proof system; the excavation system includes cutterhead motor 5, bearing and cutterhead 1, cutterhead motor 5 drives cutterhead 1 to rotate through the bearing, and excavates the coal rock in front of the working face; the described The propulsion system includes a support foot 13 and a propulsion cylinder 11, the support foot 13 is supported on the guard net 7 and the coal rock wall, and the propulsion cylinder 11 controls and pushes various systems such as the excavation system and the anti-burst shiel...
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The invention discloses a safe effective driving method and device for a high gas or outburst coal seam shield, and belongs to the field of safety and mining. The device comprises an outburst prevention shield shell body, a digging and cutting system, a gas drainage coal discharge device, a support protection system, a gas drainage system, and a foam dust control and explosion prevention system. The outburst prevention shield shell body plays a role in supporting various systems, is in close contact with a surrounding rock of a roadway to prevent deformation and outburst of the surrounding rock, a cutterhead of the digging and cutting system digs and cuts a coal seam or a rock layer in front of a working face, the coal and the rock is outputted by the gas drainage coal discharge device toa reversed loader or a belt, the support protection system plays a role in laying a net, supporting, drilling, and anchoring the surrounding rock, a propelling system is in charge of moving the shellbody and other various systems forwards and rotating the shell body and the cutterhead, and the gas in the double-layer shell body and the spiral coal discharge device is drained. The device has the advantages that the driving speed is high, the coal and the gas are prevented from bursting out and the gas is prevented from spraying to the roadway space, the safe driving is guaranteed, and the like. The safe effective driving device is particularly suitable for directly driving the roadway for the high gas or outburst coal seam.
Description
technical field [0001] The invention relates to a method and device for excavating a high-gas outburst coal seam, in particular to a safe and efficient excavation method and device for shield tunneling in a high-gas outburst coal seam, which is suitable for rapidly, efficiently and safely excavating a dangerous coal seam without taking outburst prevention and control measures , belonging to the field of security and mining technology. Background technique [0002] Coal and gas outburst (hereinafter referred to as outburst) is the main disaster in the process of coal mining in my country. The main influencing factors are coal seam gas pressure or content, in-situ stress and physical and mechanical properties of coal. Usually, coal seam gas pressure or content exceeds a certain value. There is a danger of coal and gas outburst, and the greater the mining depth, the more complex the structure, the higher the stress, the softer the coal body, and the easier it is to outburst. Th...
Claims
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IPC IPC(8): E21D9/06E21D9/08E21D9/12E21F5/02E21F7/00
Inventor 王恩元欧建春
Owner CHINA UNIV OF MINING & TECH