基于双重卸压效应的煤层气开发模式的研究

Study on development technology mode of coalbed methane based on the effect of double depressurization

为解决突出煤层群开采条件下的煤层气开发技术难题,以神华宁煤矿区的乌兰矿为工程背景,基于下伏煤层开采形成的双重卸压效应、煤层气与煤炭协调开发的时空接替,通过理论研究与工程实践,提出了基于双重卸压效应的煤层气开发模式,形成了突出煤层群开采条件下的煤层气综合立体开发技术体系,显著提高了突出煤层群矿井瓦斯治理水平和安全效益。

In order to solve the technical problems of gas extraction in outburst mines with coal seams group,according to the actual conditions in Wulan coal mine of Shenhua Group Corporation Ltd,and with the theoretical research and project practices,the development mode of coalbed methane based on the effect of double depressurization was put forwawrd based on the effect of double depressurization formed by underlying coal mining and space sequence of gas extraction with coal mining. A set of gas extraction technical system for outburst mines with coal seams group was formed. The application of those technologies could obviously improve the efficiency of gas drainage and safety benefits of the mining area.