摘要
为了研究锚网索支护条件下松软煤层综放面开切眼围岩的稳定性,运用Timoshenko梁和岩石力学理论分别对顶板似连续体以及帮煤变形破坏情况进行计算分析,确定影响开切眼围岩稳定性的各种因素。在此基础上,提出不同的锚网索支护方案,运用UDEC3.0进行数值模拟分析,重点研究不同支护强度下围岩变形情况,同时探讨不同支护强度下的顶板与帮煤之间的相互作用关系,进而优化支护参数,确定支护方案。现场试验表明,支护方案6满足工程要求,具有较好的经济和社会效益。
In order to study the stability of surrounding rocks of working face supported by the bolt-mesh-anchor technology in soft and thick coal seam excavated by fully-mechanized sublevel caving system, the deformation-failure of the pseudo-continuous roof and side coal is analyzed, respectively, by the theories of Timoshenko beam and rock mechanics. Various factors influencing the stability of rocks around working face are therefore identified. Based on the studies, all kinds of bolt-mesh-anchor supporting schemes are proposed and simulated by program UDEC3.0 with emphasis on the deformation states of surrounding rocks under various supporting intensity. At the same time the mutual effect-relation between the roof and side coal is discussed, and the supporting scheme is proposed with optimized supporting parameters. The in-situ test results show that supporting scheme No.6 can meet the requirements of engineering with better economical and social benefits.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第19期3298-3304,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
高等学校优秀青年教师和科研奖励基金资助课题