摘要
某铅锌矿井下存在断裂带,且开采过程遗留大量采空区,在地表已形成了2个塌陷坑,严重影响安全生产,需对地表塌陷坑及井下采场稳定性进行分析。采用Mathews稳定图法,计算稳定性指数和水力半径,对现有采场参数下的采场顶板稳定性进行评估,建立包含地下开采范围、塌陷坑的三维数值模型,运用数值模拟方法计算塌陷坑及采场应力变形情况,同时建立微震监测系统,通过监测数据分析塌陷坑及采场稳定性。结果表明,目前条件下塌陷坑及采场稳定性均较好,但断裂带活化影响较大,断裂带附近的3902~3903采场能量指数相对较大,对此区域的工程稳定性需要重点关注。
There is a fault zone in a lead-zinc mine,and a large number of goafs are left in the mining process.Two collapse pits have been formed on the surface,which seriously affects the safety production.It is necessary to analyze the stability of the surface collapse pits and the underground stope.The Mathews stability diagram method was used to calculate the stability index and hydraulic radius,and the stability of stope roof under the existing stope parameters was evaluated.A three-dimensional numerical model including underground mining range and collapse pits was established,and the stress and deformation of collapse pits and stope were calculated by numerical simulation method.At the same time,the microseismic monitoring system was established,and the stability of collapse pits and stope was analyzed by monitoring data.The results show that the stability of collapse pits and stope is good under the current conditions.However,the activation of the fault zone has a great influence,and the energy index of the 39023903stope near the fault zone is relatively large,so the engineering stability of this area needs to be focused on.
作者
石峰
郭利杰
张学文
王志修
袁本胜
王平
SHI Feng;GUO Lijie;ZAHNG Xuewen;WANG Zhixiu;YUAN Bensheng;WANG Ping(BGRIMM Technology Group,Beijing 100160,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China;Xinjiang Yakesi Resource Development Co.,Ltd.,Hami,Xinjiang 839000,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第11期75-81,共7页
Mining Research and Development
基金
国家重点研发计划资助项目(2022YFC2903804)
矿冶科技集团青年科技创新基金项目(04-2228)。
关键词
稳定性分析
Mathews稳定图法
数值模拟
微震监测
Stability analysis
Mathews stability diagram method
Numerical simulation
Microseismic monitoring
