摘要
随着煤矿步入现代化开采,厚煤层大采高开采技术已得到广泛应用。大采高必然导致大开采空间,覆岩运动较为剧烈,继而对地表构(建)筑物造成一定的损害。为有效地保护地表建筑物免受破坏,合理地留设保护煤柱,本文以山西晋城寺河煤矿5304大采高工作面为工程背景,建立地表移动观测站,对地表移动变形规律及岩层角值参数进行研究分析,并采用概率积分法对地表移动变形进行预计,绘制了地表移动变形等值线图。结果表明:该工作面开采后引起的地表最大下沉值为4365.6 mm,下沉系数为0.83;矿区倾向移动角为73.8°,边界角为70.2°,走向移动角为73.2°,边界角为67.8°,充分采动角为52.8°,最大下沉角为86.6°。研究成果对寺河矿区的保护煤柱设计以及“三下”开采具有一定的指导意义。
With the modernization of coal mining,thick coal seam mining technology with large mining height has been widely used.Large mining height will inevitably lead to large mining space and more intense of overlying rock movement,and will cause certain damage to the surface structures(buildings).In order to effectively protect the surface buildings from damage and reasonably reserve protective coal pillars,taking 5304 large mining height working face in Sihe Colliery,Shanxi Jincheng as the engineering background,this paper establishes the surface movement observation station,studies and analyzes ground movement and deformation laws and the parameters of rock stratum angle,predicts the surface movement and deformation by probability integral method,and draws the surface movement deformation contour line Figure,whose results show that:after mining,the maximum surface subsidence value is 4365.6 mm,and the subsidence coefficient is 0.83;the dip movement angle of the mining area is 73.8°,the boundary angle is 70.2°,the strike movement angle is 73.2°,the boundary angle is 67.8°,the full mining angle is 52.8°and the maximum subsidence angle is 86.6°,which have certain guiding significance for the design of protective coal pillar and"three under"mining in Sihe mining area.
作者
李建力
黄乃宝
Li Jianli;Huang Naibao(Taigang Energy Co.,Ltd.,Shanxi Jincheng Coal Industry Group,Jincheng,Shanxi 048006;Jincheng Zexiang Exploration Surveying and Mapping Co.,Ltd.,Jincheng,Shanxi 048006)
出处
《江西煤炭科技》
2021年第3期137-140,共4页
Jiangxi Coal Science & Technology
关键词
大采高开采
地表移动变形规律
地表移动观测站
概率积分法
large cutting height workface
ground movement and deformation laws
observation station for surface movement
probability integral method
