块石胶结充填体组成材料的力学特性  

Mechanical properties of materials in blocky rock cemented filling

作　　者：卓毓龙 陈辰[1] 王晓军[1] 邓书强 冯萧[1] 胡源[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2016年第1期64-67,共4页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51304083);江西省科技支撑计划项目(20141BBE50005);江西省研究生创新基金项目(YC2015-S294)

摘　　要：目前,国内外对于块石胶结充填体组成材料力学特性的研究较少,而材料的力学特性在一定程度上影响充填效果的好坏.基于目前的研究成果,借助室内单轴抗压、抗拉试验,得到块石胶结充填体各组成材料的应力-应变关系曲线、载荷-时间关系曲线.结果表明:3种组成材料强度差异性大;骨料试件的强度远远大于尾砂充填体试件与骨料-尾砂试件;骨料试件与骨料-尾砂试件峰后应力跌落较快,表现为脆性特征;尾砂充填体试件在到达峰值应力后下滑迟缓,说明其具有一定残余强度;尾砂充填体试件与骨料试件在单轴荷载的条件下具有初始压密、线弹性变形、塑性变形和失稳破坏4个阶段.Though the mechanical properties of the materials have great effect on the filling, there have been few studies on the mechanical properties of materials in blocky rock cemented filling. The stress-strain rela- tionship curves and load-time curves of each component of filling body are obtained by the single shaft compression and tensile tests. The experimental results show that the materials in blocky rock cemented filling in- tensity is different; aggregate strength is far greater than the tailings backfill and aggregate- tailings speci- mens; aggregate and aggregate-tailings specimens peak stress drop faster showing brittle characteristics; tailings filling specimens after reaching the peak value stress decline slowly, because of residual strength; tailing filling body and aggregate specimens in uniaxial loading conditions display four stages： initial densification, linear elastic deformation, plastic deformation and instability and failure .

关 键 词：力学特性 块石胶结充填体 应力 应变 

分 类 号：TD315.3[矿业工程—矿井建设]