废弃矿井巷道围岩蠕变稳定性分析
Creep Stability Analysis of Surrounding Rock of Abandoned Mine Roadway
胡昌顺 1李宁 2杨彦群3
作者信息
- 1. 安徽理工大学土木建筑学院
- 2. 安徽理工大学矿业工程学院
- 3. 山西焦煤集团有限责任公司
- 折叠
摘要
针对废弃矿井巷道再利用过程中因长期蠕变产生大变形,导致地下空间利用效率低和安全性差等问题,采用数值模拟软件FLAC3D分析深部巷道在3种支护方案下的围岩蠕变特征及应力变化规律.研究表明:Burgers-Mohr蠕变模型能够科学地模拟巷道在地下空间利用服务期内的蠕变特征,3种支护方案中,锚杆+预应力锚索+钢拱架支护效果最差,只适用于短期支护;衬砌支护效果次之;锚杆+预应力锚索+衬砌支护效果最明显,刚柔并济的支护方式能够有效地控制巷道围岩变形,且围岩蠕变动力能够被控制在较小范围,使得巷道发生稳定蠕变.研究结果能够为废弃矿井地下空间的安全利用提供一定的理论依据.
Abstract
Aiming at the problems such as low utilization efficiency and poor safety of underground space due to large deformation caused by long-term creep during the reuse process of abandoned mine road-way,numerical simulation software FLAC3D was used to analyze the creep characteristics and stress varia-tion rules of surrounding rock of deep roadway under three support schemes.The research shows that the Burgers-Mohr creep model can scientifically simulate the creep characteristics of roadway during the service period of underground space utilization.Among the three support schemes,the bolt + prestressed anchor ca-ble + steel arch support has the worst effect and is only suitable for short-term support.Lining and support-ing effect is second;Bolt + prestressed anchor cable + lining support has the most obvious effect.Rigid and flexible support can effectively control the deformation of roadway surrounding rock,and the creep force of surrounding rock can be controlled in a small range,resulting in stable creep of roadway.The research re-sults can provide a theoretical basis for the safe utilization of underground space in abandoned mines.
关键词
废弃矿井/深部巷道/巷道支护/蠕变动力/稳定蠕变Key words
abandoned mine/deep roadways/roadway support/creep force/stable creep引用本文复制引用
基金项目
山西省科技重大专项揭榜项目(20191101016)
中国博士后科学基金面上项目(2020M681975)
出版年
2024
NETL
NSTL
维普
万方数据