摘要
采用FLAC3D对矿区原有和后续采矿活动进行仿真模拟,对其形成原因进行研究。研究表明:在原有采空区形成过程中,空区顶板覆岩形成显著应力集中,促使空区顶板覆岩遭受剪切破坏,完整性降低,岩体移动影响地表上升位移,围岩介质承受张应力状态,裂隙呈现张开状态,加上降雨使得地表水渗入空区顶板覆岩裂隙,降低岩体强度,这些内外因素共同诱发地表冒落塌陷。
Adopts FLAC3 Dto simulate the original and subsequent mining activities. The results show that：in the original gob formation process, goaf roof rock formation obvious stress concentration phenomenon,which prompted the goaf roof rock subjected to shear failure and its integrity is reduced, rock fracture traveles to the surface. The surface rising displacement makes the corresponding region surrounding medium influenced by tensile stress, crack presents open state, and sustained rainfall reduces the strength of rock mass. The internal and external factors causes surface subsidence.
出处
《煤炭技术》
CAS
北大核心
2016年第2期27-30,共4页
Coal Technology
基金
国家自然科学基金资助项目(51004007)
省教改课题(JXJG-12-81-1)
关键词
采空区
地表塌陷
数值模拟
goaf
surface subsidence
numerical simulation
