采动作用下磷矿山边坡变形破坏机制和影响范围研究  

Deformation and F ailure Mechanism of Phosphorus Mine Slopes under Mining Action and Its Impact Range

作　　者：周雷[1,3] 王勇[2,3] 刘永志[1,3] 陶通伟 ZHOU Lei;WANG Yong;LIU Yongzhi;TAO Tongwei(Key Laboratory of Karst Georesources and Environment,Ministry of Education,Guizhou University,Guiyang 550025,China;College of Resource and Environmental Engineering,Guizhou University,Guiyang 550025,China;Mountain Geohazard Prevention R&D Centerof Guizhou Province,Guiyang 550025,China)

机构地区：[1]贵州大学喀斯特地质资源与环境教育部重点实验室,贵州贵阳550025 [2]贵州大学资源与环境工程学院,贵州贵阳550025 [3]贵州大学贵州省山地地质灾害防治工程技术研究中心,贵州贵阳550025

出　　处：《防灾科技学院学报》2024年第2期87-99,共13页Journal of Institute of Disaster Prevention

基　　金：贵阳市科技计划项目(筑科合同[2023]13-10号)。

摘　　要：以磷矿山边坡为研究对象,通过现场地质调查和离散元数值模拟手段研究其变形破坏机制。采用InSAR监测技术对矿区地表形变进行回溯,并结合有限元数值模拟手段模拟滚石运动轨迹,综合分析影响范围。研究结果表明:在采动作用下,采动裂隙由应力集中导致从采空区边界开始扩展。坡体一直处于形变状态,其裂隙范围随开采区域扩增而增大,上覆岩体整体弯曲下沉,向临空方向倾覆和断裂。地下采动造成大面积的地面沉陷,且坡脚至坡顶范围是滚石的必经之地。磷矿山边坡的变形破坏机制可以总结为采空—拉裂—蠕滑—倾倒。In this paper,the deformation and failure mechanism of the slope of a phosphorus mine are studied by on-site geological investigations and discrete element numerical simulation methods.The surface deformation of the mining area is traced by the InSAR monitoring technology,the trajectory of rolling stones is simulated by finite element numerical simulation method,and the influence range of the mine slope collapse is comprehensively analyzed combined with the above two methods.The research results indicate that the mining-induced fractures expand from the boundary of the goaf due to the stress concentration under the action of mining.The slope has been in a state of deformation,and its crack range increases with the expansion of the mining area.When the goaf of the phosphate mine layer has completely collapsed,the overlying rock mass bends and sinks as a whole,overturning and fracturing towards the direction of the air.The underground mining causes extensive ground subsidence,and the area from the foot to the top of the slope is the necessary path for rolling stones.So the deformation and failure mechanism of phosphorus mine slopes can be summarized as goaf-tensile fracture-creep-toppling.

关 键 词：地下采动作用 磷矿矿山崩塌 采动裂隙 灾害影响范围 InSAR监测 数值模拟 

分 类 号：P694[天文地球—地质学]