厚松散层矿区采动程度对地表沉降特征的影响  

Influence of Mining Degree on Surface Subsidence Characteristics Under the Condition of Mining Thick Unconsolidated Layers

作　　者：杨军伟[1] 侯得峰 

机构地区：[1]六盘水师范学院矿业工程系,贵州六盘水553004 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤矿安全》2017年第4期52-54,58,共4页Safety in Coal Mines

基　　金：贵州省教育厅自然科学研究资助项目(黔教合KY字[2015]404号);贵州省科学技术基金资助项目(黔科合LH字[2014]7465号);六盘水师范学院高层次人才科研启动基金资助项目(LPSSYKYJJ201410)

摘　　要：为了研究厚松散层矿区采动程度对地表沉降特征的影响,以红岭煤矿1501工作面地表移动观测数据为基础,着重研究厚松散层地质采矿条件下走向采动程度对地表下沉率、主要影响角正切以及拐点偏移距的影响。结果表明,在厚松散层条件下,随着走向采动程度的增加,在由极不充分采动过渡到非充分采动时,地表下沉率由0.03增加到0.10,扩大近3倍,之后随着走向采动程度的继续增加,地表下沉率变化平缓;随着走向采动程度的增加,走向主要影响角正切减小速度要明显快于倾向主要影响角正切,并且依据红岭煤矿地质采矿条件,分别拟合出了走向采动程度与地表下沉率和主要影响角正切的经验公式。In order to study the influence of mining degree on surface subsidence characteristics under the geological and miningconditions in thick unconsolidated layers, basing the surface movement observation data of 1501 working face of Hongling CoalMine area, the influence of mining degree on the surface subsidence rate, the tangent of main affecting angle and movement dis-tance of inflection point was analyzed. It was concluded that under the condition of thick loose bed, with the increase of miningdegree, surface subsidence rate increases from 0.03 to 0.10, increasing nearly 3 times when the trend mining is shifting from veryfull mining to not a sufficient mining, and later, with the still increase of mining degree, the surface subsidence rate increasesslowly; with the increase of mining degree, the tangent of main affecting angle about the trend decreases more quickly than thetangent of main affecting angle about the inclination direction, and according the geological and mining conditions of HonglingCoal Mine, the experience formula between the mining degree of trend and the surface subsidence rate and the tangent of main af-fecting angle was fitted out respectively.

关 键 词：厚松散层 采动程度 地表下沉率 主要影响角正切 地表沉降 

分 类 号：TD325.2[矿业工程—矿井建设]