某钨矿裂隙岩石力学性能分析  

Analysis on the Mechanical Properties of Cracked Rock in a Tungsten Ore

作　　者：张树标[1] 

机构地区：[1]赣州有色冶金研究所,江西赣州341000

出　　处：《中国钨业》2015年第6期1-4,共4页China Tungsten Industry

摘　　要：为分析裂隙对某钨矿岩石力学性能的影响,以同一区域的完整变质砂岩和含裂隙变质砂岩为研究对象,进行单轴抗压试验、单轴压缩变形试验和抗拉试验。试验结果表明:与完整变质砂岩相比,裂隙变质砂岩的各项力学性能指标均出现了大幅度下降,其中,抗压强度下降70%,抗拉强度下降50%,而试件抗压和抗拉破坏形式显示裂隙诱导甚至控制岩石的破坏。根据大幅下降的各项力学指标,矿山应在岩石裂隙发育区域做好地压控制措施,严防裂隙贯通扩张引起岩体局部破坏,必要时实施超前支护。To analyze the effects of cracks on rock mechanics properties of a tungsten mine, uni-axial compression test, uni-axial compression deformation test and tensile test were performed on the complete metamorphic sandstone and cracked metamorphic sandstone from the same area. Results show that the mechanical properties of cracked sandstone were demonstrated to be with a decreased tendency, in comparison with the complete metamorphic sandstone. The compressive strength decreased by 70 %, while the tensile strength decreased by 50 %. The rock samples under compressive and tensile failure mode displayed that the fracture induced or even controlled the damage of rocks. Considering the substantial decreased mechanical indexes, ground control measures should be taken in the fractured rock region to prevent crack coalescence expansion. Rock-support should also be performed if it deemed necessary.

关 键 词：裂隙 变质砂岩 力学性能 裂隙效应 

分 类 号：TD313[矿业工程—矿井建设]