摘要
为研究煤矿深部开采过程中突出诱导冲击耦合灾害的力学机制,基于沿沟煤矿突出诱导冲击耦合灾害案例,通过椭球理论和厚壁球壳理论分析灾害发生力学机制,并利用COMSOL建立流-固耦合数值模型,研究突出诱导冲击耦合灾害防治技术。结果表明:突出诱导冲击耦合灾害发生的诱因是高压瓦斯聚集,导致煤与瓦斯突出后进而发生冲击地压;当钻孔间距为3 m时瓦斯抽采效果最佳,抽采180 d时煤层最大瓦斯渗透率为1.0175×10^(-17)m^(2),最小瓦斯压力为0.869 MPa;煤层瓦斯压力降低区呈椭球形,抽采钻孔边缘与中央位置的瓦斯压力分别在330和250 d时达到安全值0.74 MPa,对应瓦斯占比为0.006%,抽采钻孔叠加效应使抽采效率提升了25%。
This paper aims to investigate the mechanical mechanism of coupling disaster induced by outburst shock in deep mining of coal mine.Based on the case of coupling disaster induced by outburst shock in Yangou coal mine,the study includs analyzing the mechanical mechanism of disaster occurrence through ellipsoid theory and thick walled spherical shell theory,establishing a numerical model of the mine's fluid structure coupling by using COMSOL,and studying the prevention and control technology of coupling disaster induced by outburst shock.The research finds that the triggering factor for the occurrence of outburst induced shock coupling disasters is the accumulation of high-pressure gas,which leads to the occurrence of rockburst after coal and gas outburst.When the drilling spacing is 3 m,the gas extraction effect is optimal.After 180 days of extraction,the maximum gas permeability of the coal seam is 1.0175×10^(-17)m^(2),and the minimum gas pressure is 0.869 MPa.The gas pressure reduction zone in the coal seam is elliptical in shape.The gas pressure at the edge and the center of the extraction boreholes reaches the safe value of 0.74 MPa at 330 and 250 days,respectively,corresponding to a gas proportion of 0.006%.The extraction efficiency increases by 25%caused by the superposition effect of the extraction boreholes.
作者
刘建宇
高文才
李鹏
孟瑞
呼永刚
Liu Jianyu;Gao Wencai;Li Peng;Meng Rui;Hu Yonggang(School of Safety Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;Guoneng Shendong Coal Group Shangwan Coal Mine,Erdos 017200,China)
出处
《黑龙江科技大学学报》
2025年第1期32-42,共11页
Journal of Heilongjiang University of Science And Technology
关键词
椭球理论
抽采间距
瓦斯压力
突出诱导冲击耦合灾害
ellipsoid theory
extraction spacing
gas pressure
coupling disasters induced by outburst shock
