Secondary Different Layers of an Integrated Hydraulic Gas Control Technology

Aimed at the features that the permeability of coal seam is low, soft and broken, fast gas extraction attenuation in Xin' an Coal Mine, based on water jet extension fracture in coal and rock and changing the stress field of law, we analyze the horizon effect of water jet measures gas control technology, the necessity and the advantages of the fixed order. Using the double pressure relief features of roof hydraulic fracturing and floor plate hydraulic punching, through optimizing design of drilling parameters, we perform the second different layers of an integrated water gas management measures to achieve the goal of quickly eliminating dangerous about coal and gas outburst, gas drainage reaching the standard.