摘要
为实现邻近层穿层钻孔的优化设计,采用离散元数值模拟的方法研究了工作面采高对老顶断裂位置的影响规律。研究结果表明:老顶断裂位置深入煤壁的距离随工作面采高的增加而增大。建立了与工作面采高相关的老顶断裂位置力学模型,模型计算结果与模拟结果相吻合。提出了邻近层穿层钻孔的优化布置原则,并在阳泉矿区开元煤矿9404工作面得到应用,取得了较好的瓦斯抽采效果。
In order to optimize borehole layer design, a discrete element numerical simulation method was used to study the affect of fracture position in the upper roof working face in relation to mining height. The results showed that with increases in the mining height, the depth from the fracture position to the wall increased. A mechanical model of roof fracture position in rela- tion to mining height has been proposed. The calculated model results correlate with the numeri- cal simulation results. The optimum layout principles of borehole layer design have been pro- posed and implemented in the 9404 working face of Kaiyuan Coal Mine in Yangquan mining area. Good gas drainage effects were achieved.
出处
《中国煤炭》
北大核心
2013年第8期97-100,114,共5页
China Coal
关键词
工作面采高
老顶断裂
力学模型
穿层钻孔
瓦斯抽采
working face mining height, fracture position of the main roof, mechanical mod-el, layer-through borehole, gas drainage
