马城矿多中段叠加开采对上覆岩体移动与变形的影响  

Influence of Superimposed Mining of Multiple Middle Section on Movement and Deformation of Overlying Rock in Macheng Coal Mine

作　　者：孙世国 马银阁 Sun Shiguo;Ma Yinge(Scholl of Civil Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学土木工程学院,北京100144

出　　处：《金属矿山》2018年第9期181-185,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:41772335);科技创新能力建设项目(编号:PXM2017-014212-000015);中冶交通建设集团科技项目(编号:2017-SZ1);首钢矿业公司项目(编号:2017-SG1);国家重点研发计划项目(编号:2016YFC0701810)

摘　　要：地下矿产开采过程中诱发的上部岩体移动将严重影响生产安全,主要原因是大规模的地下开采引起围岩移动,破坏了围岩原有的力学平衡状态,造成应力重分布,岩石移动逐渐波及到地表,引起了地表变形。为了研究多中段叠加开采对上覆岩体移动与变形的影响,以马城矿工程为例,运用MIDAS,FLAC3D等数值模拟方法模拟不同开采中段条件下地表移动与变形特点,得出各阶段沉降与水平位移值,计算相应变形值,简要介绍了地下开采引起的地表移动变形5项指标对地表建筑物的影响。研究表明:最终地表移动变形是多次重复开采扰动的叠加作用,并根据国家标准界定出移动角,从而为同类矿山的开采设计提供了科学依据。The movement of the upper rock induced by the mining of underground minerals will seriously affect the safety of production. The main reason is that the large-scale underground mining causes the movement of surrounding rock,which destroys the original mechanical balance state of surrounding rock,resulting in the stress redistribution. The rock movement gradually spreads to the surface,causing the surface deformation. In order to study the influence of superimposed mining of multi-section on the movement and deformation of overlying rocks,and taking Macheng mining project as a case,MIDAS and FLAC3 Dnumerical simulation methods are adopted to simulate the surface movement and deformation characteristics under conditions of different mining section and to obtain the values of settlement and horizontal displacement at each stage. The corresponding deformation values are calculated,and influences of 5 indexes of surface movement and deformation caused by underground mining on the surface buildings are briefly introduced. The results show that the final surface movement and deformation are the superposition of multiple repeated mining disturbances,and the moving angle is defined according to the national standard,thus providing a scientific basis for the mining design of the similar mines.

关 键 词：地下开采 数值模拟 地表变形 移动角 

分 类 号：TD879[矿业工程—非金属矿开采]