中关铁矿岩溶地下水流场特征及其开采扰动机理分析

CHARACTERISTICS OF KARST GROUNDWATER FLOW FIELD AND ANALYSIS OF MINING DISTURBANCE MECHANISM IN ZHONGGUAN IRON MINE

随着采矿业的高速发展,大水矿山开采数量日益增多,在采矿安全生产中,岩溶地下水问题备受关注。为确保开矿工作的顺利进行,同时考虑到大水矿山岩溶水的成因与破坏力,从地下水扰动机理出发,依托中关铁矿岩溶疏干放水工程,对矿区内的地下水流场进行了研究。找到了铁矿开采导致地下水系统扰动的机理,揭示了开采条件下岩溶地下水流动系统的演化规律。利用Visual Modflow地下水模拟分析软件,结合水文地质调查资料、水位动态统计数据,确定了矿区内岩溶地下水流场特征。通过地下水水位监测系统,确定了帷幕外部水源的补给方式,定位水源的集中补给通道,为下一步矿区疏干放水提供了基础数据与技术支撑。

With the rapid development of the mining industry, the number of large water flow mine is increasing. The issue of karst groundwater has attracted much attention in mining safe production. In order to ensure the smooth development of mining work, considering the cause and destructive power of karst water in large water flow mines, based on the disturbance mechanism of groundwater, relying on the dewatering project of Zhongguan iron mine, the groundwater field in the mining area was studied. The mechanism of groundwater disturbance system caused by iron ore mining is found, and the evolution law of karst groundwater flow system under mining condition is revealed. The characteristics of karst groundwater flow field in mining area are determined by adopting groundwater simulation analysis software-Visual Modflow, hydro geological survey data and water level dynamic statistical data. Through the groundwater level monitoring system, the recharge mode of the external water source is determined, and the centralized recharge channel of the water source is located, which provides the basic data and technical support for the next mine dewatering.