【摘要】 为获取综放开采工作面瓦斯涌出随开采过程的变化规律,在屯留煤矿S2205综放工作面进行了煤岩破坏的微震监测、工作面矿压显现监测和瓦斯涌出的实测研究,分析了煤岩破坏的三维时空分布、工作面支架工作阻力和超前支承压力的变化情况,结合工作面瓦斯涌出监测数据,得到了综放工作面煤岩破坏、矿压显现和瓦斯涌出三者之间的关系。结果表明:工作面煤壁前方随工作面的推进而产生大量微震事件,微震事件峰值出现的时间一般略早于工作面周期来压,而瓦斯涌出量峰值的出现又略晚于工作面周期来压,可以根据微震事件变化来间接反映工作面矿压显现和瓦斯涌出情况。屯留煤矿S2205综放工作面微震事件及能量的突然增大超前于来压剧烈显现1 d,煤岩的充分破坏超前于瓦斯的大量涌出1个班。更多还原

【Abstract】 In order to obtain variation rules of methane gushing with mining procedure in fully-mechanized caving mining face,micro-seismic monitoring for coal and rock damage,underground behavior monitoring and methane gushing monitoring were done in S2205 face of Tunliu Colliery.3D time-space distribution of coal and rock damage,working resistance of powered supports and advanced abutment pressure variation were analyzed.Combined with methane gushing data,the authors researched the relationship of coal and rock damage,underground behavior and methane gushing.The results show that amounts of micro-seismic matters occurred in behind of coal wall with the mining face advanced,summit of micro-seismic matters’ occurrence is earlier than that of the periodical pressure and the summit of methane gushing is later than that of periodical pressure.Therefore,micro-seismic matters variation might be used to predict underground pressure and methane gushing of mining face.The micro-seismic matters of fully-mechanized caving mining face in S2205 face of Tunliu Colliery and the sudden increase in energy are earlier than periodical pressure one day.And the fully destruction of coal rock is earlier than methane gushing eight hours.更多还原