井下防水型避难硐室支护结构稳定性研究  

Stability of waterproof refuge chamber's supporting structure

作　　者：边路 金龙哲[1,2] 李颂 汪澍[1,2] 杨喆[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]矿山避险技术研究中心,北京100083 [3]山东黄金归来庄矿业有限公司,山东临沂273307

出　　处：《中国安全科学学报》2015年第7期135-140,共6页China Safety Science Journal

基　　金：国家"十二五"科技支撑计划课题(2012BAK09B07)

摘　　要：为研究在淹井条件下防水型避难硐室的安全性,以归来庄金矿为例,采用FLAC^(3D)软件数值模拟开挖、锚杆支护、初喷、复喷、二次支护以及三次支护等6个支护阶段。得到应力、位移变化曲线以及塑性区范围。分析在无水压和1.5 MPa水压条件下围岩的变形特征和避难硐室支护结构的稳定性。结果表明:开挖过程引起的围岩形变和围压变化不大;在无水压条件下,锚杆支护后经过一系列喷浆支护可加固整体支护结构的稳定性;在1.5 MPa水压条件下,喷浆支护能够保证避难硐室稳定。For researching the safety of waterproof refuge chamber under the shaft submergence condition, Guilazhuang gold mine was taken as an example, utilizing FLAC^3D to simulate the excavation, bolting, initial spray, re-spray, secondary support, and third supporting et al. Data were obtained on changes in stress and displacement, and the plastic zone. Deformation characteristics of the surrounding rock and supporting structure stability of waterproof refuge chamber under the condition of 0 Pa or 1.5 MPa water pressure were analyzed. The results show that changes in stress and displacement are not large during the excavation, a series of spray support after the bolting can strengthen the overall support structure stability under the condition of no water pressure, the spray support can guarantee the stability of the refuge chamber under the condition of 1.5MP water pressure.

关 键 词：避难硐室 支护结构 稳定性分析 防水型 FLAC^3D 

分 类 号：X936[环境科学与工程—安全科学]