METHOD FOR DEGASSING OUTBURST-DANGEROUS AND GAS-BEARING COAL BEDS

摘要

A method for degassing outburst and gas-bearing coal beds consists in drilling from rock drift or district workings contouring extraction pillar on protective seam of exploration and development wells to protected bed, determination of gas permeability of rocks by analysis of rock core sampled with shooting rock layer with low permeability. Each 90-100 m in length of working not less than three exploration wells are drilled, the direction of main and secondary crack systems is determined by core samples tajrjynehbdfnmken, and working wells are drilled along those systems.