上向分段充填开采覆岩移动变形及影响范围预测——以贵州某磷矿为例  

Prediction of overburden movement&deformation and the range during upward sublevel filling mining:a case study on a phosphate mine in Guizhou

作　　者：高林[1,2,3] 芦庆和 梁维 申业兴 刘鹏泽 赵世毫 Gao Lin;Lu Qinghe;Liang Wei;Shen Yexing;Liu Pengze;Zhao Shihao(Mining College of Guizhou University,Guiyang Guizhou 550025,China;Coal Mine Roadway Support and Disaster Prevention Engineering Research Center,China university of Mining and Technology(Beijing),Beijing 100083,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guizhou University,Guiyang Guizhou 550025,China;Guizhou Institute of Technology,Guiyang Guizhou 550003,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]中国矿业大学(北京)煤炭行业巷道支护与灾害防治工程研究中心,北京100083 [3]贵州大学喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025 [4]贵州理工学院矿业工程学院,贵州贵阳550003

出　　处：《化工矿物与加工》2023年第9期59-65,共7页Industrial Minerals & Processing

基　　金：国家自然科学基金项目(52004073,52264008);贵州省科技支撑计划项目(黔科合支撑〔2021〕一般400);贵州省科学技术基金项目(黔科合基础〔2020〕1Y216);贵州大学引进人才科研基金项目(贵大人基合字〔2020〕42号);贵州大学培育项目(贵大培育〔2019〕27号)。

摘　　要：为进一步揭示上向分段充填开采覆岩移动变形规律,以贵州A磷矿为例,采用理论计算与数值仿真分析相结合的方法,对上向分段充填开采后地表变形及岩体移动对相邻矿山(B、C、D磷矿)的影响范围进行了分析预测,结果表明:a、b矿层整体开采后的最大地表倾斜、水平变形和曲率值均未达到标准规定的地表变形临界值;各分段依次开采后的地表总体最大位移量约为84 mm、地表最大倾斜变形值为0.12 mm/m、最大水平变形值为0.0193 mm/m,现阶段A磷矿开采后地表整体上不会产生较大的移动变形;随着+900 m、+920 m、+937 m、+951 m分段的逐步上向开采,岩体移动对相邻矿山的影响范围逐渐扩大,对C磷矿影响范围最大、B磷矿次之、D磷矿相对较小。建议矿山在今后开采过程中应重点加强因A磷矿开采岩体移动对C磷矿影响的预测预警及矿山压力管理工作,同时加强A磷矿对矿区范围矿层露头一带高陡边坡的巡查及地表变形监测工作,以确保矿山安全开采。In order to further reveal the law of overburden movement and deformation during upward sublevel filling mining operation,a phosphate mine in Guizhou was taken as case for study,the influencing range of ground deformation and rock mass movement on adjacent blocks(block B,C,and D)after upward sublevel filling mining was studied and predicted by the method combined theoretical calculation and numerical simulation.The results show that the maximum ground inclination,horizontal deformation and curvature value in block A,B did not reach the allowable threshold for ground deformation specified in the standard.The overall maximum displacement of the surface ground after the mining of each sublevel in turn was about 84 mm,the maximum inclination of the ground was 0.12 mm/m,and the maximum horizontal deformation was 0.0193 mm/m.At present,upon the mining of block A,the overall large displacement and deformation was not likely to take place.With the step by step upward mining at level+900 m,+920 m,+937 m and+951 m,the influencing range of rock mass movement on adjacent blocks gradually expended,which ranked block C,B and D.It is suggested that the mining management should focus on prediction and early warning of the effect of rock mass movement on block C during mining operation in block A,meanwhile the inspection on the high and steep slopes around the outcrops of the ore beds within the mining area and the monitoring of ground deformation in block A should be enhanced to ensure the safety of mining operation.

关 键 词：上向分段充填开采 岩体移动 概率积分法 地表变形 影响范围 数值仿真 

分 类 号：TD325[矿业工程—矿井建设]