煤矿地应力测试  

Measuring Strata Stress at Coal Mines

作　　者：庞俊勇 吴忠 黄醒春 

机构地区：[1]焦作矿业学院

出　　处：《煤炭科学技术》1991年第7期28-30,34,共4页Coal Science and Technology

摘　　要：介绍地应力测试方法和测试仪器,采用孔径变形法和孔壁应变法测试4矿6个点110个测点的测试结果和分析。Methods for measuring strata stress recently include method of measuiing hole deformation in diameter and. other 3 methods. We adopt method of measuring hole deformation in diameter. Instruments and equipment for measuring strain include hole diameter deformation meter, spring modular ratio meter, resistance strain gauge, Iocalizer, hydraulic drill, drilling stems,bits and pump.3 unparallel boreholes were drilled for method of measuring hole deformation in diameter, and threedimensional stresses are measured.With the aid of calculating formulas of deformation theory,theoretical value of three-dimensional stresses are calculated by computer. Measuring results are: (1) strata stress 8.31 MPa at Jiulishan coal mine; 12.2 MPa at Hebi No. 6 coal mine; 24 MPa at Guanshan coal mine; 13.79 MPa at Shuitou coal mine, (2) there are shear stress at 3 coal mines: (3) the lst main stress is near horizontal and perpendicular to strike of coal seam, which makes supporting of coal roadway difficult; (4)high strata stress and high gas press may easily lead togas outburs.

关 键 词：煤矿 地应力 测试 

分 类 号：TD311[矿业工程—矿井建设]