Study on technique application of eliminating outburst by extracting gas from shallow hole in the fully mechanized mining face

Abstract：F15 outburst coal bed of Pingdingshan coal industry 8th coal mine has a low-permeability and low-gas extraction.There are many problems on the fully mechanized mining face, such as inefficient gas extraction, the effect of gas emission is poor, the gas is often overrun, restrict on production safety etc.Gas extracting experiment from shallow hole in dynamic pressure area behind the face is done.The key technical parameters such as the reasonable layout of the hole and extraction are determined, according to the safety requirement and result of the related parameter determination, as well as the condition of the coal bed and the construction technique.The effect of the extraction and eliminating outburst and the production benefit is studied, after the shallow hole extraction.Through researches of the gas density changes, the rate that exceed the allowed figure and the output, the results show that the technique of extracting gas through shallow hole is feasible, the effect of eliminating gas and outburst is obvious, and it is one of the effective ways to solve gas problem of the outburst coal face.

Keyword：fully mechanized mining face;gas extracting of shallow hole;reasonable technical parameters;outburst-elimination measure;