Drilling-explosion-pumping triadic pressure-relief outburst-prevention method

A three-in-one, outburst prevention technology, which is applied in the fields of earthwork drilling, gas discharge, safety devices, etc., can solve the problems of heavy drilling construction workload, low outburst prevention efficiency, and small effective impact range of drilling, etc. Highlight the danger, easy to operate, and reduce the effect of outstanding potential energy

Inactive Publication Date: 2009-12-30
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] At present, the measures used to eliminate conflicts in high-gassy and low-permeability coal seams mainly include deep hole loosening blasting, hydraulic punching, hydraulic slotting, and coal seam water injection...

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0017] The three-in-one pressure relief and anti-outburst method of drilling, blasting and pumping of the present invention:

[0018] (1) On the coal seam 1 in front of the coal mining or excavation face, the control holes 9 and the blasting holes 4 are alternately arranged along the bedding or through the bedding; a single row or multiple rows are arranged to drill several long boreholes. Ordinary drilling construction technology is basically the same, you can choose spiral or round drill pipe according to your needs;

[0019] (2) First carry out construction work on alternately arranged control holes 9 one by one. The depth of the control holes 9 along the bedding is 8-15m, and the depth of the through-bedding drilling is 20-40m. hole operation, and connect the borehole to the drainage pipe network through the drainage hole pipe, manifold pipe and ...

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Abstract

The invention provides a drilling-explosion-pumping triadic pressure-relief outburst-prevention method, which is most suitable for regional pressure-relief outburst-prevention of a high gas and low permeability outburst coal seam. The method comprises the following steps: alternately arranging hole positions of control holes and blast holes of an along bed or a cross seam on a coal seam in front of a coal mining or tunneling working surface; performing construction work on the control holes one by one which are arranged alternately, and performing gas drainage pressure-relief on the coal seam; and constructing the blast holes one by one which are arranged alternately, placing emulsion explosive, detonating a detonating cord for detonation until finishing all operation of the blast holes of the working surface, and performing cycle operation on the next working surface. The method can improve the air permeability of a coal body by 20 to 50 times, has full entire pressure relief and function of effectively preventing outburst, and provides excellent conditions for high work efficiency and safe mining; and the method has the advantages of simplicity, convenient operation and good using effect, and improving the labor efficiency and reducing the labor intensity.

Description

technical field [0001] The invention relates to a three-in-one pressure relief and outburst prevention method of drilling, blasting and pumping. It is especially suitable for regional pressure relief and outburst prevention in high-gas and low-permeability outburst coal seams. Background technique [0002] Coal and gas outburst is one of the serious natural disasters in the process of coal mining, especially with the efficient intensification of coal production and the increase of mining depth, the amount of gas gushing out is increasing, and the risk of gas explosion and gas outburst is dangerous. More and more serious, gas disasters have become the most important factor restricting the development of efficient and intensive mining technology and safe production. Therefore, how to effectively solve the problem of gas gushing in the process of mining high-gas coal seams is of great significance to the safe production of coal mines. Since the 1970s, my country has carried o...

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Application Information

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IPC IPC(8): E21F7/00
Inventor 林柏泉翟成孙鑫吴海进
Owner CHINA UNIV OF MINING & TECH
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