黄山铜镍矿采空区顶板冒落规律研究

黄山铜镍矿30#矿体开采过程中存在采空区与32#矿体采空区贯通并塌至地表的安全隐患。为掌握30#矿体开采过程中采空区顶板冒落规律,基于微震监测技术,进行台网布置优化和波速校正,形成符合该矿山实际需求的在线监测系统。分析微震事件时空演化规律,观察微震事件异常变化,圈定微震事件空间分布范围,得出顶板冒落规律。微震事件有向32#塌陷区不断发展的趋势,现场显现与观测结果相一致,为后续隐患治理提供基础。

Investigation on Roof Caving Characteristic of Goaf in Huangshan Copper Nickel Mine

In the mining process of 30 # orebody in Huangshan copper nickel mine, there was a hidden danger that the overlying roof of the goaf was connected with the 32 # orebody goaf and collapsed to the surface. In order to grasp the Characteristic of roof caving in the goaf during the mining of 30 # orebody, the network layout optimization and wave velocity correction were carried out to form an online monitoring system that meted the actual needs of the mine based on the microseismic monitoring system. The temporal and spatial evolutions of microseismic events were analyzed and the abnormal changes of microseismic events were observed, the spatial distribution range of microseismic events was delineated, the roof caving characteristic was obtained. The microseismic events had a trend of continuous development to the 32 # collapse area, and the on-site appearance was consistent with the observation results, provided the basis for the follow-up hidden danger treatment.