【摘要】 为了研究山西省沁水煤田阳泉矿区寿阳区块15~#煤层顶板的地应力场分布规律,从而有效指导压裂方案设计,在前期地质勘探工作的基础上,建立宏观地质模型;运用综合判定法处理Kaiser声发射测试结果,并结合古地磁实验,测定取样处主应力方向;基于边界荷载反分析法,运用数值拟合及线性回归方法,使用ABAQUS有限元软件反演得出寿阳区块地应力场的分布。研究结果表明:寿阳区块15#煤层顶板最大地应力在11~15 MPa之间,最大地应力东北部、北部偏高,西南部、西北部偏小,中部变化稳定,呈东西走向的倾斜式断层带主要影响区块南部的地应力分布与大小。更多还原

【Abstract】 In order to study the distribution law of in-situ stress field of 15~#coal seam roof in Shouyang block of Yangquan mining area of Qinshui coal field,Shanxi province,and effectively guide the fracturing scheme design,the macroscopic geological model of this block was established based on the preliminary geological exploration work. Kaiser acoustic emission test results were processed using comprehensive judgment method,and the principal stress direction distribution at the sampling site was determined according to paleomagnetism experiment. The distribution of the in-situ stress field of Shouyang block was obtained based on the boundary load back analysis method and linear regression method using ABAQUS finite element software. The results show that the maximum stress of the 15~#coal seam roof in Shouyang block is 11 ~ 15 MPa,the maximum stress in northeast and north is higher,in southwest and northwest is lower,and in the central part is stable. The distribution and size of the crustal stress in the south of the block are affected mainly by the inclined fault zone in east-west direction.更多还原