王庄煤矿740水平地应力测试研究

Research on crustal stress measurement on 740 level of Wangzhuang Coal Mine

针对王庄煤矿地质构造情况,采用小孔径水压致裂地应力测量装置,对740水平进行地应力测试。结合矿井区域地质构造和煤岩层赋存条件,分析了该水平地应力的特点。研究表明,该研究区域的地应力基本上是由自重应力和水平构造应力构成,构造应力在地应力中所占比重大于自重应力;最大主应力在近水平方向,最大水平主应力方向主要集中在N42.0°W～N59.2°W之间,最大水平主应力与巷道的夹角近似超过45°。

Aimed at the geological structure of Wangzhuang Coal Mine,the crustal stress measurement was carried out with the help of the small borehole hydraulic fracturing test unit on 740 level.The characteristics of crustal stress was analyzed according to the geological structure and the coal strata occurrence.The research showed that the crustal stress in this region involves gravity stress and horizontally structured stress,and the latter makes greater contribution than the former.The maximum main stress was in the nearly horizontal direction,while the maximum horizontal main stress mainly distributed in the range of N42.0°W-N59.2°W,and the angle between it and the roadway was approximately greater than 45°.