摘要
针对某大型有色金属矿山下向分层胶结充填法转无底柱分段崩落法过程中覆盖层形成的难题,提出利用诱导冒落法使胶结充填体和顶板围岩自然冒落形成覆盖层的技术方案,并结合矿山实际确定出首采分段的合理位置。采用理论分析和数值模拟对胶结充填体和上部覆岩的冒落模式及机理展开研究,研究结果表明,矿山在利用诱导冒落法形成覆盖层时易突发直通地表的大规模冒落,从而引发冒落气浪筒流冲击危害,威胁到井下作业安全。研究得出,可以通过采取连续扩展诱导工程与均匀预留安全散体垫层等一系列措施来预防冒落气浪冲击危害,以保障工作面生产安全。最后,将该方案应用于生产实际,取得了良好的应用效果,可为类似矿山提供借鉴。
In view of the difficult problem of overburden formation in the process of a large nonferrous metal mine from the downhill layered cementing filling method to the sublevel caving method,a technical scheme for the formation of overburden formed by the natural caving of cemented backfill and roof rock by the induced caving method is put forward,and the reasonable location of the first mining level is determined according to the actual situation of the mine. Theoretical analysis and numerical simulation are used to study the caving mode and mechanism of cemented backfill and roof rock. The research results show that when induced caving method is used to form overburden,large-scale caving which is easy to burst directly into the ground surface will lead to the impact damage of caving gas cylinder and threaten the safety of underground operation. It is concluded that a series of measures,such as continuous expansion induction engineering and uniform reserve of safe dispersion cushion,can be taken to prevent the impact of falling air waves,so as to ensure the production safety of mining. Finally,the scheme is applied to production practice and good results are obtained,which can be used for reference for similar mines.
作者
钟敏
谭宝会
张志贵
陈星明
朱强
杨鹏
ZHONG Min;TAN Baohui;ZHANG Zhigui;CHEN Xingming;ZHU Qiang;YANG Peng(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Environment&Resources,Southwest University of Science and Technology,Mianyang 621010,China;Beijing Key Laboratory of Information Service Engineering,Beijing 100101,China)
出处
《金属矿山》
CAS
北大核心
2021年第6期108-114,共7页
Metal Mine
关键词
胶结充填法
崩落法
覆盖层形成
诱导冒落
cementation filling method
sublevel caving method
overburden formation
induced caving
