摘要
为分析河临煤矿7号煤层的煤岩物理力学性质,在实验室对采区的煤岩进行实验分析。在充分调研掌握河临煤矿的生产条件和地质概况的基础上,对7(4)号煤层的顶底板进行取样,通过切割和打磨制备成标准实验块。实验结果显示,顶板泥岩抗压强度约为8.15MPa,抗拉强度约为3.05 MPa,最大剪应力3.23 MPa;中粒砂岩抗压强度平均49 MPa;抗拉强度平均4.36 MPa,最大剪应力平均2.8 MPa;即属于中等稳定顶板。工作面底板主要为炭质泥岩,平均抗压强度为10.32 MPa,平均抗拉强度0.81 MPa,工作面底板强度属较软级别。
In order to analyze the physico-mechanical properties of coal rocks in the No.7 coal seam of Heling Mine,experimental analysis of coal rocks in the mining area was carried out in the laboratory.On the basis of full investigation and understanding of the production conditions and geological profile of the mine,the top and bottom plates of the No.7(4)coal seam were sampled and prepared into standard experimental blocks by cutting and grinding.The experimental results showed that the compressive strength of the mudstone of the top plate was about 8.15 MPa,the tensile strength about 3.05 MPa,and the maximum shear stress 3.23 MPa;the medium-grained sandstone had an average compressive strength of 49 MPa;the average tensile strength 4.36 MPa,and the maximum shear stress 2.8 MPa;as medium stable top plate.The working surface base plate was mainly carbonaceous mudstone with an average compressive strength of 10.32 MPa and an average tensile strength of 0.81 MPa,and the working surface base plate strength was of a softer grade.
作者
苏礼
秦洪岩
Su Li;Qin Hong Yan(Shanxi Coal Transportation and Marketing Group SanyuanShiku Mining Industry Corporation Ltd.,Changzhi 047500,China;School of Safety Engineering,North China Institute of Science and Technology,Beijing,101601,China)
出处
《煤炭与化工》
CAS
2020年第5期63-66,共4页
Coal and Chemical Industry
关键词
岩石物理力学参数
围岩力学
试验
物理力学性质
rock physical and mechanical parameters
surrounding rock mechanics
test
physical and mechanical properties
