摘要
针对西铭矿2^(#)煤巷道支护设计缺少相应的地应力、围岩力学指标和围岩结构类型等基础参数等问题,在西十二采区设置了第五、六测点进行了现场地质力学测试,得到2^(#)煤层顶板以上20 m范围内整体完整性较好;2^(#)煤应力场在量值上属于中等偏低应力值区域,最大水平主应力方向总体为NWW方向;并通过围岩强度测试结果综合计算,得到2^(#)煤层顶板以上10 m范围内泥质砂岩岩层强度平均值为64.45 MPa,细砂岩强度平均值为89.47 MPa,2^(#)煤层煤体强度为14.41 MPa。
In view of the lack of corresponding ground stress,surrounding rock mechanics index and surrounding rock structure type in No.2 coal roadway,Ximing Colliery,on-site geomechanics tests are carried out at the fifth and sixth measuring points in the west 12th mining area.Stress field belonging to the medium to low stress value area in terms of magnitude,and the direction of the maximum horizontal principal stress being generally the NWW direction,the overall integrity within 20 m above the roof of No.2 coal seam is better.Through the comprehensive calculation of the surrounding rock strength test results,the average strength of the argillaceous sandstone within 10 m above the roof of the No.2 coal seam is 64.45 MPa,the average strength of the fine sandstone is 89.47 MPa,and the coal body strength of the No.2 coal seam is 14.41 MPa.
作者
刘云鹤
Liu Yunhe(Ximing Colliery,Shanxi Xishan Coal Electricity Co.,Ltd.,Taiyuan,Shanxi 030052)
出处
《江西煤炭科技》
2021年第2期55-57,60,共4页
Jiangxi Coal Science & Technology
关键词
煤巷
围岩物理力学参数
测试研究
coal roadway
physical and mechanical parameters of surrounding rocks
testing research
