摘要
采用相似材料模拟试验研究了建筑荷载影响下的条采老采空区覆岩和煤柱失稳破坏过程。研究表明:随着荷载增大,老采空区覆岩和煤柱在附加应力作用下变形破坏,在采空区上方地表加载时,覆岩呈"鼓形"破坏形态,而后岩层断裂垮落;在煤柱上方地表加载时,煤柱受压缩在边界上方发育高角度纵向裂缝,而后采空区覆岩垮落失稳,沿发育的裂缝切冒至地表。
Studies the old mined rock and coal pillar instability and failure process by using similar material simulation methods. Studies show: as the load increases, the ooverlying rock deformation, coal pillar compression deformation occurs, surface over goaf loading, overlying rock was 'drum' failure mode, then rock fracture collapse; Surface over pillar loading, high angle longitudinal cracks appear at the top of the coal pillar, then mined rock collapse instability, the collapse to the surface along the cracks.
出处
《煤炭技术》
CAS
北大核心
2015年第10期21-23,共3页
Coal Technology
基金
国家科技重大专项(2011ZX05064-11)
天地科技股份有限公司技术创新基金(KJ-2012-TDKC-08)
天地科技开采设计事业部创新基金(KJ-2014-TDKC-09)
