摘要
7042掘进工作面掘进至断层影响带时,频繁出现顶板锚索断裂及"煤炮"等现象。基于现场实测数据,分析认为区域残余水平构造应力、复杂煤层结构及邻近工作面采动影响是7042巷道矿压异常的主要原因。提出了缩小锚索间排距,提高预紧力,加强矿压监测,注重安全防护等建议。
The roof anchor cable breaking and coal burst occurred frequently when 7042 heading face drove into fault zone. On the basis of site measurement data, it was thought that the main reasons of causing 7042 tunnel abnormal pressure were the residual horizontal tectonic stress, complex coal seam structure and the nearby working face excavation. The proposal of shorten the distance of anchor cables, increasing the pretensioning, enhancing the pressure monitoring and emphasizing the safety protection were presented.
出处
《中国矿山工程》
2013年第1期44-46,共3页
China Mine Engineering
关键词
锚索
破断
断层
地应力
掘进
anchor eable
broken
fault
ground stress
excavation
