某铁矿井下开采岩移对地表铁路的影响分析  

Analysis of the Influence of Underground Mining Strata Movement in a Iron Mine to the Railway on the Surface

作　　者：肖益盖[1,2,3] 杨新华[4] 王星[1,2,3] 

机构地区：[1]中钢集团马鞍山矿山研究院有限公司 [2]金属矿山安全与健康国家重点实验室 [3]华唯金属矿产资源高效循环利用国家工程研究中心有限公司 [4]安钢集团舞阳矿业有限责任公司

出　　处：《现代矿业》2015年第9期19-22,共4页Modern Mining

基　　金：十二五国家科技支撑计划(编号:2011BAB07B02)

摘　　要：铁路紧邻某铁矿地表矿区东侧穿过,距离矿区采矿权边界约161 m。为论证地下开采岩移对地表铁路的影响,建立了矿山开采三维数值分析力学模型和地表变形数值模型,根据浅孔留矿全面法和浅孔房柱采矿法的特点及矿山下行式和后退式的回采顺序,采用有限差分程序,以自重应力场为主,计算分析了矿山开采扰动下的采场与围岩地压活动规律、地表变形规律及对地表铁路的影响。由地表铁路所在处的倾斜值、曲率值和水平变形值,验证了井下开采岩移对地表铁路的影响符合设计规范要求,为矿山安全开采提供了依据。The surface railway of a iron mine is adjacent to the eastern part of the mining area,the distance of the surface railway to the mining boundary of the mining area about 161 m. In order to analyze the influence of the underground mining strata to surface railway,the three-dimensional mining numerical analysis mechanics model is established. According to the characteristics of the shallow hole shrinkage stoping method in an all-round way and shalow hole room-and-pillar mining method and the retreating mining sequence,the finite difference program that give priority to the gravity stress field to analyze the influence of the laws of ground pressure activities of stope and surround rock and surface deformation under the mining disturbance to the surface railway. Besides that,the values of tile,curvature and horizontal deformation of the area where the surface railway is located are also calculated. The research result show that the influence of underground mining strata movement to the surface railway is comply with the design specification requirements,therefore,it can provide some reference for mine safety production.

关 键 词：井下开采 三维数值模拟 岩移 主应力 地表变形值 

分 类 号：TD325[矿业工程—矿井建设]