摘要
为研究地应力作用下地下金属矿山采场不稳固现象及灾变机理,以云南狮子山铜矿16中段29-38^(#)采场为研究对象,数值模拟并分析了采后结构的静力稳定性以及地应力-爆破耦合作用下的动静稳定性。结果表明,矿柱邻近大补偿空间区域应力集中程度最高,为最危险区域;采场围岩损伤为较高应力集中下地应力-爆破应力波耦合作用的结果,大补偿空间爆破开挖是采场不稳定的直接原因。为提高采场结构稳定性,应尽量减小补偿空间尺寸,并尽可能将补偿空间均匀布置于矿房之内。
In order to study the instability phenomenon of stope and mechanism of catastrophic incident under in-situ stress in the underground metal mines,the stope 29-38^(#)at 16 middle level in Shizishan Copper Mine in Yunnan Province was taken for research by using numerical simulation.The static stability of stope structure after mining,and the dynamic and static stability under the coupling action of in-situ stress and blasting were investigated.The results showed that the pillar adjacent to the large compensation space had a high degree of stress concentration,and became the most dangerous area.The damage of surrounding rock in the stope was principally attributed to the coupling action of in-situ stress and blasting stress wave under high stress concentration,and the excavation by blasting in the large compensation space was the direct cause for the stope instability.For this reason,the size of compensation space should be reduced as much as possible and the compensation space should be evenly arranged in the room as much as possible in order to improve the stability of stope structure.
作者
曾庆田
徐天岳
刘科伟
ZENG Qing-tian;XU Tian-yue;LIU Ke-wei(Yuxi Mining Co Ltd,Yuxi 653100,Yunnan,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2021年第2期7-11,共5页
Mining and Metallurgical Engineering
基金
国家自然科学基金(51974360)。
关键词
地应力
采场结构
回采
采场
稳定性
应力集中
数值模拟
in-situ stress
stope structure
stoping
stope
stability
stress concentration
numerical simulation