深部高应力竖井井壁稳定性分析及支护优化  

Stability Analysis and Support Optimization of Shaft Wall with Deep High Stress

作　　者：王胜开 朱志根[2] 余一松[2] 程涌 刘家明 WANG Shengkai;ZHU Zhigen;YU Yisong;CHENG Yong;LIU Jiaming(Yunnan Chihong Zn and Ge Company Ltd.,Qujing,Yunnan 654200,China;Changsha Engineering&Research Institute Ltd.of Nonferrous Metallurgy,Changsha,Hunan 410019,China;Yunnan Yarong Mining Technical Co.,Ltd.,Kunming,Yunan 650093,China)

机构地区：[1]云南驰宏锌锗股份有限公司,云南曲靖市654200 [2]长沙有色冶金设计研究院有限公司,湖南长沙410019 [3]云南亚融矿业科技有限公司,云南昆明650093

出　　处：《矿业研究与开发》2022年第4期38-44,共7页Mining Research and Development

摘　　要：为解决云南某矿深部盲竖井支护问题,采用现场试验、室内试验和数值模拟等方法对盲竖井进行稳定性分析。通过岩石力学试验确定岩体力学参数,对井壁进行数值模拟,根据模拟结果划分施工安全风险等级,最后确定盲竖井井筒支护方式及参数。结果表明:1031~992 m为低风险施工段,992~942 m为高风险施工段。随着深度增加,最大主应力越来越大,X、Y及Z方向位移量也越来也大。井筒围岩边缘最大主应力须小于11.15 MPa。在开挖状态下,几乎所有围岩均处于不稳定状态,需进行支护。根据支护优化结果,1031~942 m标高均采用C30钢纤维混凝土支护;1031~992 m标高支护厚度为400 mm;992~942 m标高支护厚度则为450 mm。In order to solve the support problem of deep blind shaft in a mine of Yunnan, the stability of blind shaft was studied by means of field experiment, indoor experiment and numerical simulation. Mechanical parameters of rock mass were determined through rock mechanics experiments. Then, numerical simulation of shaft wall was carried out. Based on the simulation results, the construction safety risk level was divided. After that, support mode and parameters of blind shaft were determined. The results show that, 1031~992 m is the construction section with low risk, and 992~942 m is the construction section with high risk. With the increase of depth, the maximum principal stress increases, and the displacements in X, Y and Z directions become larger and larger. The maximum principal stress of surrounding rock at the edge of shaft should be less than 11.15 MPa. In the excavation state, almost all surrounding rocks are in an unstable state and need to be supported. According to the support optimization results, C30 steel fiber concrete support is adopted for 1031~942 m elevation, with a support thickness of 400 mm in 1031~992 m elevation and a support thickness of 450 mm in 992~942 m elevation.

关 键 词：深部竖井 井壁稳定性 支护优化 数值模拟 

分 类 号：TD352[矿业工程—矿井建设]