CAJ | 학술논문

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。
광산공정중침대불은정광주，대기진행혼응토포과처리，시일항행지유효적가고조시。국내외대혼응토포과암석복합결구적연구상대교소。통과혼응토포과사암복합결구단축항압강도시험，대기변형파배특정진행분석。결과표명：혼응토포과사암복합결구재단축하재작용하，기파배형태이“X”형점진식위주，렬문주요위“X”형관천포과체；경혼응토포과처리적사암，기겁한하재여잔여강도명현제고。종능량적각도연구료단축압축조건하혼응토포과사암복합결구적역학행위，분석료혼응토포과사암복합결구여미포과사암재변형파배과정중능량흡수여겁한하재지간적관계，진이종능량적각도설명혼응토포과조시대제고광주겁한하재구유교대공헌。
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.