混凝土包裹砂岩复合结构变形破坏特征分析  

Analysis of deformation failure characteristics of concrete wrapped sandstone composite structures

作　　者：朱志成[1,2] 刘杰[1,2] 罗涛[1,2] 王晓军[1,2] 冯萧[1] 许振华[3] 王明 

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 [2]江西省矿业工程重点实验室,江西赣州341000 [3]中国瑞林工程技术有限公司,南昌330031 [4]金诚信矿业管理股份有限公司,北京101500

出　　处：《有色金属科学与工程》2015年第3期78-82,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51304083);江西省科技计划项目(20141BBE50005);江西省青年自然科学基金(20142BAB216020)

摘　　要：矿山工程中针对不稳定矿柱,对其进行混凝土包裹处理,是一项行之有效的加固措施.国内外对混凝土包裹岩石复合结构的研究相对较少.通过混凝土包裹砂岩复合结构单轴抗压强度试验,对其变形破坏特征进行分析.结果表明:混凝土包裹砂岩复合结构在单轴荷载作用下,其破坏形态以"X"型渐进式为主,裂纹主要为"X"型贯穿包裹体;经混凝土包裹处理的砂岩,其极限荷载与残余强度明显提高.从能量的角度研究了单轴压缩条件下混凝土包裹砂岩复合结构的力学行为,分析了混凝土包裹砂岩复合结构与未包裹砂岩在变形破坏过程中能量吸收与极限荷载之间的关系,进而从能量的角度说明混凝土包裹措施对提高矿柱极限荷载具有较大贡献.It is an effective remediation to use concrete package for unstable pillar in mining works. There have been few researches about rock＇s composite structure wrapped by concrete at home and abroad. Its deformation failure characteristic is analyzed by uniaxial compressive strength test of concrete wrapping sandstone composite structure. It is shown that on the condition of uniaxial loading, the composite structure＇s failure mode is mainly ＂X＂ progressive type and its cracks are mainly ＂X＂ type throughout inclusions. The ultimate load and residual strength of the sandstone wrapped by concrete are improved significantly. Under the condition of uniaxial loading, the mechanical behavior of concrete wrapping sandstone composite structure is studied from the aspect of energy. During the deformation failure progress of concrete wrapping sandstone without concrete wrapping sandstone, the relation between energy absorption and ultimate load is analyzed. It is illustrated that it has great contribution to the improvement of pillar＇s ultimate load by using concrete wrapping from the aspect of energy.

关 键 词：砂岩 矿柱 混凝土包裹 极限荷载 变形破坏 能量 

分 类 号：TD315.3[矿业工程—矿井建设]