8101工作面开切眼掘进深孔预裂爆破顶板控制技术研究

Study on the Control Technology of Cutting Hole in 8101 Working Face into Deep Hole

采用FALC3D建立了王庄煤矿8101工作面数值计算模型,研究了开切眼掘进施工过程中工作面的围岩及其顶底板的应力变化和分布规律,提出并实施了对工作面提前采取深孔预裂爆破进行顶板弱化,降低工作面来压强度,解决了工作面坚硬顶板悬露且难以垮落的问题。

A numerical model of the work face of Wangzhuang Coal Mine 8101 was established by means of the FALC format 3D Preaching, and the stress changes and distribution laws of the surrounding rock and the top floor of the work face during the open-cut hole excavation construction were studied. The paper proposes and implements the method of weakening the roof by precrack blasting of deep hole in advance, reducing the pressure strength of the surface, and solving the problem that the hard roof of the surface is suspended and difficult to collapse.