缓倾斜厚矿体的地压演化规律与采空区治理研究  

Study on the Evolution Law of Ground Pressure and the Goaf Treatment of Gently-inclined Thick Ore Body

作　　者：兰晓平 LAN Xiaoping(Hunan Shizhuyuan Nonferrous Metals Co.Ltd.,Chenzhou,Hunan 423000,China)

机构地区：[1]湖南柿竹园有色金属有限责任公司

出　　处：《矿业研究与开发》2019年第12期68-72,共5页Mining Research and Development

基　　金：国家重点研发计划项目(2016YFC0600702-04)

摘　　要：某缓倾斜厚大钨矿体采用全面法开采,形成了约300万m^3的复杂空区,但治理空区的充填能力有限,如何让充填体尽快地控制与改善整体地压形势?首先,采用矿柱-空区岩体结构的理论力学分析、矿床地质分析与微震监测技术手段相结合的方法,综合研究了地压分布与演化规律,获得了整体采空区的应力集中区域;然后,将应力集中区域规划为优先充填区域,经过约6a的首期充填治理后,井下地压活跃程度明显好转,特大复杂空区的地压形势得到了控制与改善。实践表明,在充填能力有限的情况下,结合应力转移与集中规律的研究成果,科学合理地规划充填顺序的技术方法能较好地解决特大复杂空区的治理难题。A gently-inclined thick ore body was mined by comprehensive method leading to form a complex goaf of about 3 million stere.However,the filling capacity of controlling the goaf was limited.How could the filling body control and improve the overall pressure situation as soon as possible?Firstly,by combining the theoretical mechanical analysis of the rock mass structure of the pillar and goaf,the geological analysis of the ore deposit and the microseismic monitoring technique,the distribution and evolution law of the ground pressure were comprehensively studied,and the stress concentration area of the whole goaf was obtained.Then,the stress concentration area was planned as the priority filling area.After the first filling treatment of about 6 years,the underground ground pressure activity degree was significantly improved,and the ground pressure situation in the extremely large and complex goaf was controlled and improved.The practice showed that in the case of limited filling capacity,combining with the research results of stress transfer and concentration law,the technical method of scientifically and rationally planning filling sequence can solve the treatment problem of extra large and complex goaf.

关 键 词：特大复杂空区 微震监测 地压演化规律 充填 

分 类 号：TD853.391[矿业工程—金属矿开采]