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 deeppoint observation of the movement feature of topcoal around №110 fullymechanized sublevel caving faee in Wei Jiadi Coal Mine,Jing Yuan Bureall.i.e.Topcoal′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 topcoal,which was from 40m ahead of the face,was increased.In 30～20m ahead of the face,the displacemont of topcoal was increased greatly and horizontal displacement was 21 time of vertical one.The movement of topcoal can be described as preliminaty compressing,violent compressing,discrete crushing and bulk flowing processes.The deformation and movement of topcoal influencecl the outflow of gas considerably.
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
关键词
顶煤运移特征
瓦斯涌出
软煤层
deeppoint observation movement feature of topcoal crevasse gas emission
