基于FLAC3D对某铜矿深部开采地压活动规律研究

介绍了地压活动规律对矿山深部开采的重要影响,通过应用FLAC~(3D)软件对某铜矿59#矿体开采过程中的两种工况进行数值模拟计算研究,发现59#矿体在开采至十五中段时,对围岩扰动较小,不会出现顶板大面积冒落的情况;开采对3#采空区稳定性影响最大,对2#采空区稳定性影响最小;废石充填对维护空区稳定有一定作用,但作用不大;随着59#矿体开采深度的不断增加,其对断层的影响程度也逐渐增加;废石充填对断层稳定性影响较小。从而得出随着开采深度的增加,对围岩扰动越来越大,围岩稳定性降低,顶板发生突然冒落的可能性较大,一旦顶板发生突然冒落,井下会出现较大响声和振动,但由于该铜矿采用崩落法开采,采场上部有大量冒落覆岩,顶板突然冒落不会形成冲击地压。

Research on Ground Pressure Activity Law of Deep Mining in a Copper Mine Based on FLAC3D

The article introduces the important influence of the law of ground pressure on the deep mining of the mine. Through the application of FLAC3D software to numerical simulation calculation of two working conditions in the mining process of a copper mine 59# ore body, it is found that the 59# ore body is mined to ten. In the middle of the fifth section, the disturbance to the surrounding rock is small, and there will be no large-scale collapse of the roof; mining has the greatest impact on the stability of the 3# goaf, and has the least impact on the stability of the 2# goaf; The stability of the empty area has a certain effect, but the effect is not great. With the increasing depth of the mining of the 59# ore body, the degree of influence on the fault is gradually increased; the waste rock filling has little effect on the stability of the fault. It is concluded that as the mining depth increases, the disturbance to the surrounding rock becomes larger and larger, the stability of the surrounding rock decreases, and the roof is likely to fall suddenly. Once the roof suddenly falls, there will be a loud noise in the well. Vibration, but because the copper mine is mined by caving, there is a large amount of overburden rock in the upper part of the stope, and the roof suddenly rises and does not form impact pressure.