深部开采地应力对区域性移动的影响  

Research on the influence of geo-stress on regional horizontal movements due to deep mining

作　　者：李文秀[1] 汪琦[1] 吉占华[1] 闻磊[1] 

机构地区：[1]河北大学建筑工程学院,河北保定071002

出　　处：《化工矿物与加工》2011年第11期17-19,共3页Industrial Minerals & Processing

摘　　要：在某些深部开采的地下矿山,尽管竖井远在"移动角"所确定的当前采空区边界之外,但仍然受到地下开采的影响,不仅产生垂直移动,而且产生较大范围的区域性水平移动。针对矿山深部开采引起的区域性水平移动问题,在大量矿山实测资料分析基础上,采用数值方法分析了区域性水平移动及其对矿山竖井变形的影响,认为区域性水平移动对竖井的影响不仅与保护矿柱的大小有关,而且还与采区水平应力场状况及采矿条件等因素有关。In some deep underground mine, although the vertical shaft is located outside the limit determined by conventional angle of draw subsidence influence criteria, the shaft have seen only negligible vertical deformation as a result of mining, there has been widespread evidence of regional horizontal deformation of the land surface, large distances away from the mining area. Possible explanations of these movements include one or a combination of mechanisms such as pre-mining stress relaxation, regional joint patterns, movement toward active goaf areas. This paper presents a case study of the regional horizontal displace- ments measured during mining, and a discussion of the possible explanations for these phenomena. This paper analyzes the causes of the displacement and the deformation of the shaft, holding that the damage of the shaft relates to not only the size of the protective ore column but also the obliquity, lithology, horizontal stress field and mining conditions.

关 键 词：深部采矿 水平应力 区域性水平移动 

分 类 号：TD26[矿业工程—矿井建设] TU457[建筑科学—岩土工程]