CAJ | 학술논문

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。
견경특후매층채용종방개채시，정매수도절리렬극면적절할，장형성상호우합적괴체，당정매하방형성림공면시，부분정매괴체장수선출현과락。침대차정황，결합현장찬공규시운용괴체이론연구방법，분석정매체수도적절할상황。종괴체연착단일절리면적과락화쌍절리면적과락류형출발，분석기운동관계화동력관계，득도괴체활동과락여절리면내마찰각，급기여활동과락방향적관계식，위견경특후매층정매과락분석제공신적연구각도。
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.