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如何确定预抽效果检验指标临界值是当前煤与瓦斯突出矿井亟待解决的技术问题之一。根据大宁矿的煤层瓦斯地质条件,分析了断层、构造煤以及瓦斯对矿井3#煤层煤与瓦斯突出的控制作用。根据钻屑瓦斯解吸指标K1与煤层瓦斯含量之间的关系,利用瓦斯含量测定技术,结合现场统计分析方法以及国内外多年的防突实践经验,确定了大宁矿3#煤层赋存正常区域的预抽效果检验指标临界值为9 m3/t,地质构造异常区域的预抽效果检验指标临界值为7 m3/t。
How to determine the critical value of pre-pumping effect test index is one of the technical problems to be solved urgently in the current coal and gas outburst mines. According to the geological conditions of coal seam gas in Daning Mine, the control action of faults, structural coal and gas on the coal and gas outburst in No.3 seam of mine is analyzed. According to the relationship between the gas desorption index K1 of cuttings and the gas content in coal seams, the determination of gas content in the normal area of No.3 coal seam of Daning Coal Mine by using the gas content measurement method and the on-site statistical analysis method and the anti-outburst experience at home and abroad for many years The threshold value of pre-pumping effect test index is 9 m3 / t, and the critical value of pre-pumping effect test index of anomaly area of geological structure is 7 m3 / t.