露天转地下采场围岩及覆岩变形破坏特征研究  

Research on Deformation and Failure Character of Underground Surrounding Rock and Overlying Strata Transition from Open Pit to Underground Mining

作　　者：李小双 赵奎[1,2] 张东明[4] 支学艺[1,2] Li Xiaoshuang;Zhao Kui;Zhang Dongming;Zhi Xueyi(School of Resources and Environment Engineering,Jiangxi University of Science and Technology,C.anzhou,Jiangxi 341000,P.R.China;Jiangxi Key Laboratory of Mining Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,P.R.China;Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines,University of Science ＆ Technology Beijing,Beijing 100083,P.R.China;School of Resources and Environmental Science,Chongqing University,Chongqing 400045,P.R.China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000 [3]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 [4]重庆大学资源及环境科学学院,重庆400045

出　　处：《地下空间与工程学报》2018年第5期1359-1371,1386,共14页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金青年基金(41702327);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开发基金(ustbmslab201705);江西理工大学博士启动基金(jxxjbs17004)

摘　　要：以云南磷化集团有限公司晋宁磷矿为依托背景,借助数字照相量测技术,通过相似材料模拟试验,对20°、50°两种不同倾角条件下,露天转地下开采后,地下采场围岩与覆岩的变形破坏特征及动态演化过程进行了系统研究。结果表明:(1)地下采场围岩及覆岩的变形演化过程可划分为局部小范围微动、线性持续增大以及整体非线性剧烈垮塌3个阶段;(2)矿体倾角由20°增至50°后,边坡与地下采场围岩及覆岩的变形整体趋缓,采动影响范围小幅度缩减,沉降曲线则由非对称槽型变为碗型;(3)采场矿柱回收过程中,地下采场围岩及覆岩发生突发性失稳,呈现出明显的"多米诺骨牌效应"。Based on the engineering background of Jingning phosphate mine of Yunnan Phosphate Chemical Group Co. Ltd.,the deformation and failure character and dynamical evolution process of underground surrounding rock and overlying strata were studied after transformation from open-pit to underground mining. The similar material simulating experiment and digital photographic measurement technology were used to investigating these issues,with the conditions of 20° ore body dips and 50° ore body dips. The results showed that：（1） the evolution process of mining deformation of underground surrounding rock and overlying strata could be divided into three stages,which contained small deformation in originally small and local scale stage,linear continuous increase stage and the whole nonlinear violent collapse stage.（2） with the ore body dip increasing from 20° to 50°,the mining influence area narrowed down in a small range,the deformation slowed down of underground surrounding rock and overlying strata,and the geometric shape of settlement curve changed from asymmetric slot to asymmetric bowl.（3） the abrupt occurrence of instability of underground surrounding rock occurred in the process of ore pillar recovery,and it presented the obvious ＂The Domino Effect＂.

关 键 词：露天转地下 地下采场围岩及覆岩 变形破坏特征 动态演化过程 相似材料模拟 

分 类 号：TD871[矿业工程—非金属矿开采]