CAJ | 학술논문

急倾煤层沿空软岩巷道变形破坏机理复杂,多次采动影响下巷道维护难度大.利用现场调研实测、物理相似模拟实验和数值模拟分析,对赵家坝急斜煤层群重复采动沿空软岩巷道变形破坏机理进行了深入分析结果表明:赵矿急斜巷道变形破坏是十分复杂的时间、空间问题,即在初次采动阶段:非对称岩体结构及应力分布导致巷道变形失稳;二次扰动阶段:非对称原岩应力释放机理导致巷道变形失稳;三次、四次扰动阶段:拱脚效应与层间压剪变形失稳机理导致巷道变形失稳,为该类型巷道支护形式与参数的选择提供了科学依据.
급경매층연공연암항도변형파배궤리복잡,다차채동영향하항도유호난도대.이용현장조연실측、물리상사모의실험화수치모의분석,대조가패급사매층군중복채동연공연암항도변형파배궤리진행료심입분석결과표명:조광급사항도변형파배시십분복잡적시간、공간문제,즉재초차채동계단:비대칭암체결구급응력분포도치항도변형실은;이차우동계단:비대칭원암응력석방궤리도치항도변형실은;삼차、사차우동계단:공각효응여층간압전변형실은궤리도치항도변형실은,위해류형항도지호형식여삼수적선택제공료과학의거.
@@@@Laboratory forWestern Mine Exploitation and Hazard Prevention of Ministry of Education, Xi’an 710054, China) The deformation and failure mechanism of gob-side entry in soft rock strata and steep coal seam is very complex and hard to be understood. In particular, it is difficult to maintain the entry under the impact of repeated mining operation. Based on the site measurement, physical analogous simulation and numerical simulation, the deformation and failure mechanism of the gob-side entry in Zhaojiaba coal mine is analyzed in this study. The study results show that with the repeated mining disturbance, the entry deformation and failure is a complicate time-space problem. In other word, at the initial excavation stage, the asymmetric rock mass structure and stress distribution cause the entry failure, at the second mining disturbance, the asymmetric in situ stress causes the entry failure, and at the third and fourth mining disturbances, the arch foot effect and press-shear deformation between the rock strata layers result in the entry failure. The study provides a scientific basis for determining the reasonable support form and layout parameters.