Front-injection back-extraction parallel coal seam inclined drilling gas control device and method
A technology of inclined drilling and drainage drilling, which is applied in the direction of gas discharge, safety devices, earthwork drilling, etc., can solve the problems of reducing the drainage effect and not seeing the research results, so as to improve the drainage efficiency and reduce the gas surge output effect
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[0029] Such as image 3 As shown, a kind of pre-injection and post-pumping gas control method along coal seam inclined drilling of the present invention, the specific implementation steps are as follows:
[0030] 1. Firstly, according to the requirements of the method, the underground workers first construct the gas drainage borehole 1 in the roadway of the mining face, and then discharge the cinder remaining in the drainage borehole 1 .
[0031] 2. The sponge body 5 is wrapped around the front end of the inner sealing tube 2 of the double sealing tube, and the density of the pores of the sponge body 5 is dense at the front and sparse at the back.
[0032]3. Wrap the airbag 3 around the outer wall of the inner sealing tube, adjacent to the rear end of the spongy body 5; at the air inlet of the airbag 3, splice a PVC plastic pipeline 4 so that the gas enters the airbag 3 through the pipeline.
[0033] 4. Pound the inner sealing pipe 2 of the double sealing pipe into the ex...
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