水平采空区群动态失稳演化过程及工程控制  

Dynamic failure process and engineering control of horizontal goaf group

作　　者：姜立春[1,2] 曾俊佳 贾晓川[2] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]华南理工大学安全科学与工程研究所,广东广州510640

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第8期821-825,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家"十二五"科技支撑计划项目(2012BAB08B02);国家自然科学基金项目(51174093;51374035)

摘　　要：为研究单层和多层水平采空区群的动态失稳演化过程,采用RFPA岩石破裂过程分析软件,并通过近似重度增加法在数值模型顶部施加增量载荷,表征水平采空区群围岩的折减过程.研究结果表明:对比单层水平采空区群,多层水平采空区群岩体结构具有较强的抗破坏能力;单层水平采空区群的间柱失稳过程较分散,而多层水平采空区群的间柱失稳过程则较集中;单层和多层水平采空区群动态失稳的演化过程具有一定的相似性,即按照从中部间柱(底层)、相邻间柱、顶板(底层)到左右两侧帮壁的顺序失稳破坏.根据单层和多层水平采空区群的失稳演化过程,从间柱、顶板、左右帮壁三个方面提出水平采空区群失稳破坏的工程控制措施.In order to investigate dynamic failure processes of single-layer and multilayer horizontal goaf group, the strength reduction of rocks on horizontal goaf group was characterized by using approximate gravity increase method to apply incremental load on the top of the numerical model with the rock failure process analysis software RFPA. The results show that compared with single-layer horizontal goaf group, the structure of multilayer one has stronger ability to resist damage; barrier pillar failure process of single-layer horizontal goaf group are scattered while the one of multilayer horizontal goaf group are concentrated; dynamic failure process of single-layer and multilayer horizontal goaf group are similar, and the order is from the central barrier pillar（on the bottom）, adjacent barrier pillar, roof（on the bottom） to left and right side walls. Finally, according to dynamic failure process of single-layer and multilayer horizontal goaf group, engineering control is put forward from three aspects of barrier pillar, roof and walls.

关 键 词：岩石力学 地下矿山 水平采空区群 动态失稳 岩石破裂过程分析 近似重度增加法 工程控制 

分 类 号：TU45[建筑科学—岩土工程]