Optimisation of Gas Extraction Technology for Bottom Plate Penetration Drilling
In order to improve the efficiency of gas extraction in coal seam 3#,optimize the gas extraction technology of cross layer drilling in the bottom drainage roadway,specifically improve the sealing effect of drilling through grouting and optimized hole sealing,optimize slag discharge to reduce gas dynamic manifestation during drilling,use atmospheric water to expand the hole and reasonably regulate the extraction pipeline network to improve the gas extraction effect.After engineering application,the gas extraction efficiency of the 3301 return airway bottom drainage roadway through layer drilling has been significantly improved,creating good conditions for tunnel excavation and subsequent mining face recovery.
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