深部软岩硐室群破坏机制与施工过程优化  

Failure mechanism and construction process optimization of deep soft rock chamber group

作　　者：黄玉兵 王琦[1,2,3] 高红科[1,3] 蒋振华[1] 李珅 陈奎 HUANG Yubing;WANG Qi;GAO Hongke;JIANG Zhenhua;LI Shen;CHEN Kui(Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan,Shandong 250061,China;State Key Laboratory of Coal Resources and Safety Mining,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083

出　　处：《中国矿业大学学报》2021年第1期69-78,共10页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51874188,52074164,42077267,4194101);山东省重大科技创新工程项目(2019SDZY04);山东省杰出青年基金项目(ZR2020JQ23);山东省高等学校“青创科技计划”(2019KJG013)。

摘　　要：为了降低深部软岩硐室群施工过程互扰影响,以厚冲积层矿井万福煤矿为工程背景,对井底车场在扰动影响下的围岩变形发展模式、松动范围扩展规律、锚索承载有效性进行了监测与分析.在此基础上,开展了煤仓硐室群不同断面尺寸、不同间距、不同开挖次序下施工过程数值模拟,建立了围岩表征变形量、围岩表征变形增量等评价指标,明确了硐室群扰动影响机制,得到了煤仓硐室群最优开挖次序.利用本文结论指导了现场施工.结果表明:煤仓硐室群采用最优开挖方案后,围岩最大变形量168mm,满足工程建设需求.Surrounding rock control under the influence of construction disturbance is a big challenge in deep soft rock chamber group.To address this issue,Wanfu coal mine,the thick alluvial mine in China,was taken as engineering background.Under the influence of construction disturbance,the growth model of surrounding rock deformation,expanding regularity of surrounding rock damage depth and availability of anchor cables were analyzed by on-site monitoring in shaft station.Numerical experiment of different cross-section size,chamber spacing and construction sequence were carried out.The evaluation indexes such as characterization value of the deformation and the deformation increment were established.The construction disturbance mechanism was clarified,and the optimal excavation sequence of coal bunker chamber group was obtained,which guided the field application.The results of the application show that adopting the optimal excavation sequence,the maximum deformation of coal bunker chamber group is 168mm,which can satisfy the engineering demand.

关 键 词：硐室群 破坏机制 施工过程优化 数值试验 

分 类 号：TD264[矿业工程—矿井建设]