Shanxi Huayang Group Xinneng Co., Ltd. No.1 Mine
School of Emergency Management and Safety Engineering, North China University of Science and Technology

放顶煤开采上覆巨厚砾岩层变形移动直接影响到综放工作面矿压显现。基于千秋煤矿综放面地质采矿条件,利用数值模拟方法研究综放开采上覆巨厚砾岩层变形移动特征。随着综放面的推进,煤层上覆岩层逐渐变形移动和垮落,造成巨厚砾岩层出现离层和水平位移,测点水平位移量L(x)为综放面推进距离C1和测点距开切眼水平距离x的非线性函数。相似模拟结果表明,当综放面推进度665m时,巨厚砾岩层发生初次垮落。研究结论为综放开采围岩控制提供了技术支撑。

The deformation and movement of the overlying super-thick conglomerate layer in top coal caving mining directly affect the manifestation of mine pressure in the fully mechanized mining face. Based on the geological and mining conditions of the fully mechanized caving face in Qianqiu Coal Mine, numerical simulation methods are used to study the deformation and movement characteristics of the overlying super-thick conglomerate layer in fully mechanized caving mining. As the fully mechanized caving face advances, the overlying rock of the coal seam gradually deform, move and collapse, causing layer separation and horizontal displacement of the super-thick conglomerate layer. The horizontal displacement amount L(x) at the measuring point is a nonlinear function of the advancing distance C1 of the fully mechanized caving face and the horizontal distance x from the measuring point to the open cut eye. Similar simulation results indicate that when the advancing degree of the fully mechanized caving face is 665 m, the first collapse of the super-thick conglomerate layer occurs. The research conclusion provides technical support for the control of surrounding rock in fully mechanized caving mining.