采矿与安全工程学报2017，Vol.34Issue(3)：425-430,6.DOI:10.13545/j.cnki.jmse.2017.03.004
综放工作面端头区煤岩的冒放规律及合理工艺参数
Caving law of the coal and rock in the end zone of the fully mechanized caving face and its rational technological parameters
摘要
Abstract
To maximize the recovery of the top-coal from the end zone,with the consideration of the position of hydraulic support of the end zone in the working face,support type,and the geographical conditions and technological conditions of working face,the three-dimensional model for carving coal in end zone was established,and the influence of different region of coal carving and parameters on the law of coal and rock flow down as well as the top-coal recovery rate was analyzed.Research has found that with the increase of the number of end zone hydraulic support carving coal,the displacement vector and migration scope of coal gangue increase obviously,the stress transfers to the forward of working face,roadway and coal pillar,the coal-gangue separatrix becomes unclear,the coal carving ratio decreases and the refuse rate increases;based on the top-coal recovery rate and the influence of coal carving on the stability of the roadway,the end zone is further divided into three zones:zone of easy coal carving,zone of less easy coal carving,and zone of least easy coal carving,with the first two as the main zones for coal carving in the end zone.Based on the research results,the principle of coal carving in end zone is put forward,the techniques and related parameters of coal carving in end zone are decided,and the field application has achieved good technical and economic effect.关键词
综放开采/端头放煤/煤岩冒放规律/合理工艺参数Key words
full-mechanized caving mining/coal carving in end zone/coal and rock flow regulation/reasonable caving parameters分类
矿业与冶金引用本文复制引用
时成忠,刘长友,赵通..综放工作面端头区煤岩的冒放规律及合理工艺参数[J].采矿与安全工程学报,2017,34(3):425-430,6.基金项目
国家自然科学基金项目(51574220) （51574220）
