缓倾斜薄矿体矿柱回采采场围岩稳定性研究  

Study on surrounding rock stability of pillar extraction in thin gently inclined ore body

作　　者：于跟波[1,2] 杨鹏[1,2,3] 陈赞成[4,5] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与环境工程学院,北京100083 [3]北京联合大学,北京100101 [4]北京矿冶研究总院,北京100060 [5]山东黄金集团有限公司,山东济南250101

出　　处：《煤炭学报》2013年第A02期294-298,共5页Journal of China Coal Society

基　　金：十二五"国家科技支撑计划资助项目(2011BAZ03382)

摘　　要：为解决缓倾斜薄矿体矿柱安全高效回采这一难题,对采场围岩稳定性进行研究是非常必要的。以三山岛金矿平里店矿区为工程背景,在前期现场调查、室内力学试验及岩体力学参数工程处理的研究基础上,运用RMR分级法和Q系统分级法分别对缓倾斜薄矿体矿柱回采围岩质量进行分级研究,得出采场围岩稳定性一般;分析了缓倾斜薄矿体采空区顶板破坏机理,并基于Burgers体建立了缓倾斜薄矿体采空区流变力学模型,为采场支护提供了理论依据技术支持;设计了缓倾斜薄矿体矿柱回采采场围岩应力实时监测系统,得到了采场围岩应力变化规律,现场实践证明:监测系统精度高、运行稳定。Abstract：In order to solve the difficult problem of pillar extraction safely and efficiently in thin gently inclined ore body, the study of surrounding rock stability is very necessary. Pinglidian mining area of Sanshan Island Gold Mine was studied in this paper. On the basis of site investigation, laboratory rock mechanics test and the mechanical parameter analysis of rock mass, the surrounding rock quality of extracted pillar in thin gently inclined ore body were studied using the RMR classification method, the Q system classification method respectively. Results show that the surround- ing rock stability of the stope is average. Also, the roof damage mechanisms of thin gently inclined ore body were ana- lyzed. The rheologic mechanics model of roof was established based on Burgers model,which provides a theoretical ba- sis and reference for roof supporting. In addition, a real-time monitoring system of surrounding rock stress was de- signed,which works well in pillar extraction in thin gently inclined ore body, and the variation of surrounding rock stress was obtained. The practical application proves that the system has high accuracy and stability. Key words： thin gently inclined ore body ; pillar extraction ; engineering quality of rock masses ; sensitivity ; damage mechanisms ; stress monitoring

关 键 词：缓倾斜薄矿体 矿柱回采 岩体质量 稳定性 破坏机理 应力监测 

分 类 号：TD322[矿业工程—矿井建设]