块体理论在坚硬特厚煤层综放开采中的应用探索.pdfVIP

学兔兔 第20卷第2期 (总第123期) 煤 矿 开 采 Vo1．20No．2(Series No．123) 2015年4月 COAL MINING TECHNOLOGY April 2015 块体理论在坚硬特厚煤层综放开采中的应用探索 赵铁林 ，王恩鹏 ，解兴智 ， (1．煤炭科学研究总院开采设计研究分院，北京100013；2．天地科技股份有限公司开采设计事业部，北京100013) [摘 要] 坚硬特厚煤层采用综放开采时，顶煤受到节理裂隙面的截割，将形成相互耦合的块 体，当顶煤下方形成临空面时，部分顶煤块体将首先出现垮落。针对此情况，结合现场钻孔窥视运用 块体理论研究方法，分析顶煤体受到的截割状况。从块体沿着单一节理面的垮落和双节理面的垮落类 型出发，分析其运动关系和动力关系，得到块体滑动垮落与节理面内摩擦角，及其与滑动垮落方向的 关系武，为坚硬特厚煤层顶煤垮落分析提供新的研究角度。 [关键词] 块体理论；坚硬煤层；特厚煤层；综放开采 [中图分类号]TD821 [文献标识码]A [文章编号]1006—6225(2015)02．0013—03 Application of Block Theory in Fllll-mechanized Caving Mining in Hard and Extremely．．thick Coa1．．seam ZHAO Tie．1inlI ．WANG En．pengI1 ．XIE Xing．zhi (1．Coal Mining＆Designing Research Branch，China Coal Research Institute，Beijing 100013，China； 2．Coal Mining＆Designing Department，Tiandi Science＆Technology Co．，Ltd．，Beijing 100013，China) Abstract：In full—mechanized caving mining hard and extremely—thick coal-seanl，top-coal was cut by joints and fissure and would form blocks which were interconnected．When free face occurred under top—coal，part top-coal blocks would firstly cave．Applying block theory and bore-hole imaging，cut status of top—coal was analyzed．The movement and dynamics relationship of blocks was analyzed from the form of block caving along single-joint and double-joint．Internal frictional angle of joint and the relational expression of the an— gle and slide direction was obtained．which provided new research view for top．coal caving in hard and extremely—thick coa1．sean1． Keywords：block theory；hard coal—seam；extremely—thick coalseam；full-mechanized caving mining 我国榆阳地区分布着煤质优良、埋藏浅、煤体 高度4m，放煤高度6．61nl，采放比1：1．65。为了 硬度大、节