含瓦斯特厚软煤层顶煤运移特征观测  

OBSERVING THE MOVEMENT FEATURE OF TOPCOALIN VERY THICK SOFT SEAM CONTAINING GAS

作　　者：李树刚[1,2] 刘士琦 梁俊芳[1,2] 

机构地区：[1]西安矿业学院资源开发与管理工程系 [2]靖远矿务局魏家地矿

出　　处：《西安矿业学院学报》1998年第2期103-106,115,共5页Journal of Xi'an University of Science & Technology

摘　　要：通过对靖远魏家地矿１１０综放面顶煤运移特征的深基点观测得知，富含瓦斯特厚软煤层顶煤变形从综放面前方７０ｍ始，上位顶煤在４０ｍ处位移增大；３０～２０ｍ处顶煤移动加速，中位顶煤水平位移是垂直位移的２．１倍；顶煤运移可概括为初期压缩、强烈压缩、破碎离散和散体流动放出４个过程；Lots of importont results were obtained by deeppoint observation of the movement feature of topcoal around №110 fullymechanized sublevel caving faee in Wei Jiadi Coal Mine,Jing Yuan Bureall.i.e.Topcoal′s deformation of the very thick soft seam containing plentiful gas was began from 70m ahead of the working face,and the displaee ment of upper topcoal,which was from 40m ahead of the face,was increased.In 30～20m ahead of the face,the displacemont of topcoal was increased greatly and horizontal displacement was 21 time of vertical one.The movement of topcoal can be described as preliminaty compressing,violent compressing,discrete crushing and bulk flowing processes.The deformation and movement of topcoal influencecl the outflow of gas considerably.

关 键 词：顶煤运移特征 瓦斯涌出 软煤层 

分 类 号：TD325.4[矿业工程—矿井建设] TD712.5