摘要
针对我国蒙西地区华北型煤田巨厚煤层综采放顶煤面临的大采高、宽采宽、长走向、覆岩高地应力等现象,以淮南矿业集团西部煤电唐家会煤矿为例,通过对比分析切顶与不切顶回采工作面顶板微震事件的发育,对巨厚主采石炭系煤层回采过程中微震监测响应规律进行研究,分析微震监测时-空-能综合响应特征。结果表明,对于唐家会煤矿6煤巨厚煤层开采未切顶工作面,微震监测顶板岩层扰动范围较大,可达到15~20倍采高;采取切顶卸压措施工作面,微震监测覆岩破坏约12倍采高,对巨厚煤层开采顶板岩层矿压控制效果明显;切顶卸压可超前构建一个相对低应力区域,避免矿压异常显现动力灾害。
In view of the phenomenon of large mining height,wide mining width,long strike and high in-situ stress of overlying strata in fully mechanized top coal caving in extremely thick coal seam of North China coalfield in western Inner Mongolia,taking Tangjiahui Coal Mine of Huainan Mining Group as an example,by comparing and analyzing the development of roof microseism events in roof cutting and non-roof cutting mining faces,the response law of microseism monitoring in the mining process of Carboniferous coal seam in thick main mining was studied,and the time-space-energy comprehensive response characteristics of microseism monitoring were analyzed.The results showed that for the uncut roof working face of No.6 coal seam in Tangjiahui Coal Mine,the disturbance range of roof strata monitored by microseism monitoring was large,which could reach 15~20 times of mining height.In the working face with roof cutting and pressure relief measures,the height of overburden failure monitored by microseismic monitoring was about 12 times of the mining height,which had obvious effect on the control of roof strata pressure in extremely thick coal seam mining.Roof cutting and pressure relief could build a relatively low stress area in advance to avoid dynamic disasters caused by abnormal mine pressure.
作者
常成林
杜元豪
高宏伟
薛悟强
王印
陈建东
Chang Chenglin;Du Yuanhao;Gao Hongwei;Xue Wuqiang;Wang Yin;Chen Jiandong(Ordos City Huaxing Energy Co.,Ltd.,Ordos O17000,China;Hebei Coal Research Institute Co.,Ltd.,Xingtai 054000,China;Hebei Key Laboratory of Mine Microseismicity,Xingtai O54000,China)
出处
《煤炭与化工》
2026年第3期61-65,共5页
Coal and Chemical Industry
关键词
巨厚煤层
顶板覆岩
高位预裂
切顶卸压
矿压显现
微震监测
能量释放
extremely thick coal seam
roof overburden
high position presplitting
roof cutting and pressure relief
mine pressure appear
microseism monitoring
energy release
