厚松散层下多工作面回采对地表沉降的影响研究  

Influence of multiple working faces mining on surface subsidence under thick unconsolidated layers

作　　者：赵忠义[1] 陈昕昕[1] 梁华杰[1] 

机构地区：[1]六盘水师范学院矿业工程系,贵州六盘水553004

出　　处：《煤炭工程》2017年第10期141-144,共4页Coal Engineering

基　　金：贵州省高校优秀科技创新人才支持计划(黔教合KY字[2015]510号);贵州省教育厅采矿工程特色重点学科(黔学位办[2015]26号)

摘　　要：为了研究厚松散层矿区多工作面回采对地表沉降的影响,以涵盖红岭煤矿四个工作面地表移动观测数据为基础,主要研究厚松散层下倾向采动程度对地表沉降特征、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,在厚松散层矿区,随着回采工作面采空区数目的不断增加,当倾向采动程度由极不充分采动过渡到非充分采动时,地表下沉率由0.21猛增到0.45,增大近114.3%,之后随着回采工作面采空区数目的继续增加,地表下沉率增加缓慢,并最终稳定于一定值;随着多工作面连续回采,下沉盆地倾向主要影响角正切递增速度明显快于走向主要影响角正切,但最终稳定值偏小,分别稳定于2.6和2.7,最后分别拟合出了倾向采动程度与地表下沉率及主要影响角正切的经验公式。In order to study the influence of multiple working face mining on surface subsidence under thick unconsolidated layers, based on the surface movement observation data of four working faces in Hongling Coal Mine, the influence of mining degree on the surface subsidence characteristics, surface subsidence rate, the tangent of main affecting angle and movement distance of inflection point were analyzed. It was concluded that under the thick unconsolidated layers, with the increase of goaf number, surface subsidence rate increases from 0. 21 to 0. 45 （ by 114. 3% ）, and then, with the continuous increase of goaf number, the surface subsidence rate increases slowly and finally stabilizes and a certain rate; with the continuing mining of multiple working faces, the inclination direction tangent of main affecting angle increases more quickly than the strike direction tangent of main affecting angle, while the stabilized values were 2. 6 and 2. 7. Finally, the experience formulas were fitted out for the relationship between inclination mining degree and surface subsidence rate as well as tangent of main affecting angle.

关 键 词：厚松散层 多工作面连续回采 地表沉降 拐点偏移距 

分 类 号：TD325[矿业工程—矿井建设]