基于FLAC^(3D)对赣南某钨矿采空区的研究及治理方案

Goaf Treatment on a Tungsten Ore in Gannan Based on FLAC^(3D)

研究运用FLAC3D数值模拟软件对赣南某钨矿采空区进行模拟、分析,并结合现场监测数据给出监测和治理方案。通过对赣南某钨矿的地质地形及地压活动情况调研,针对地压活动频繁的388中段西部的348采场进行数值模拟开挖,将空区上部的岩层通过载荷的形式加载到模型上,得出由于矿体回采导致顶板失去支撑,上覆岩层产生指向采空区的位移变化。通过对应力云图的分析研究,随着空区跨度的增加,出现了明显的应力集中现象,其分析结果与矿区现场滑尺和微震监测情况相符合,对采空区中变形和应力集中的区域进行及时的预警预报,为矿区安全防范提供依据,同时也对同类矿山具有相应的参考作用。

FLAC^(3D) numerical simulation software was used to simulate and analyze the gob area of a tungsten mine in southern Jiangxi Province. Based on the monitoring data, the monitoring and treatment plan was given. After investigating the geological topography and pressure-pressure activities of a tungsten mine in southern Jiangxi Province, excavation of 348 stopes in the western section of 388, where the pressure was frequent, was conducted.The rock formation above the empty area is loaded onto the model by the load. It is concluded that the displacement of the overburden to the goaf caused by the loss of roof support due to the mining of the ore body. Through the analysis of the stress cloud image, obvious stress concentration phenomenon appears with the increase of the span of the empty area. The analysis results are consistent with the field slide and microseismic monitoring in the mining area. A timely warning and forecasting of the deformation and stress concentration areas in the goaf provides a favorable basis for the mine safety precaution