摘要
研究受多中段采动影响的竖井工程稳定性问题,成为我国最大充填法开采矿山——金川二矿区的一项重要课题,采用数值模拟的方法对此进行了研究,研究结果表明,加大贫矿开采后形成四中段同时回采,相对3个中段同时回采,只是加大竖井工程破坏的风险,尤其是竖井井壁位移方面比较突出,最大增幅达50%左右,但并没有改变竖井今后可能发生变形、破坏的模式,其变形、破坏的模式依然是在延续现今单纯三中段富矿开采时竖井变形和破坏的模式,穿过竖井井筒的断层破碎带仍然是竖井可能发生破坏的突破口。
The study on stability of the shaft engineering influenced by muti-level mining is an important subject for Jinchuan No.2 mining area which is the biggest cut-and-fill mine in China.The stability of the shaft engineering was studied by using numerical simulation method.The results indicated that comparing with simultaneous mining of 3 levels,simultaneous mining of 4 levels for strengthened mining of lean ore will increase risk of the shaft engineering damage,especially displacement of shaft wall will increase and the increase value may is up to 50% about,but will not change the deformation and damage pattern of shaft,which is same with that when simultaneous rich ores mining of 3 levels,fault fracture zone through the shaft wall is still the breakthrough of the shaft engineering damage.
出处
《矿业研究与开发》
CAS
北大核心
2010年第2期31-33,57,共4页
Mining Research and Development
基金
"十一五"国家科技支撑计划重大项目(2008bab32b01)
关键词
多中段开采
采动影响
竖井工程
数值模拟
Muti-level mining
Mining effect
Shaft engineering
Numerical simulation
