块体理论在坚硬特厚煤层综放开采中的应用探索  

Application of Block Theory in Full-mechanized Caving Mining in Hard and Extremely-thick Coal-seam

作　　者：赵铁林[1,2] 王恩鹏[1,2] 解兴智[1,2] 

机构地区：[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

出　　处：《煤矿开采》2015年第2期13-15,共3页Coal Mining Technology

基　　金：天地科技股份有限公司科技创新基金项目:新疆巨厚煤层高强度开采关键技术研究(KJ-2014-TDKC-04);天地科技股份有限公司开采设计事业部青年创新基金项目:浅埋煤层综放工作面坚硬顶煤弱化技术研究(KCSJ-QNCX-2014-07)

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式,为坚硬特厚煤层顶煤垮落分析提供新的研究角度。In full-mechanized caving mining hard and extremely-thick coal-seam, 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 coal-seam.

关 键 词：块体理论 坚硬煤层 特厚煤层 综放开采 

分 类 号：TD821[矿业工程—煤矿开采]