Bao'an Coal Industry Co., Ltd., Shanxi Coal Transportation and Sales Group

保安煤矿15号煤层分布有2处采空积水区,且积水量较大,如果泄漏极易对环境造成严重影响。为明确采空区积水泄漏的可能性,基于风险分析、指标筛选、权重计算建立了采空区积水环境污染风险评价模型,阐述了不同影响因素对风险等级的影响。结果表明,矿井水水质复杂程度是引发环境污染的重要因素之一,权重值为14%,蒙特卡洛模拟确定了其对风险等级划分的贡献度和敏感度分别为61.24%和59.5%。风险评价结果表明采空区积水在无泄漏时对环境污染的弱风险等级超过60%,若采空区积水泄漏后风险等级迅速变为强风险,亟需结合矿区环境保护要求,实施长期采空区积水封存的工程治理方法。研究成果可为采空区积水区的风险控制管理以及绿色矿山建设提供理论依据。

There are two goaf water accumulation areas distributed in the No.15 coal seam of Bao'an Coal Mine, and the amount of water accumulation is relatively large. If there is leakage, it will easily cause serious impact on environment. In order to clarify the leakage possibility of goaf accumulated water, a risk evaluation model for goaf accumulated water environmental pollution is established based on risk analysis, indicator screening, and weight calculation, and the impact of different influencing factors on the risk level is explained. The results indicate that the complex degree of mine water quality is one of the important factors causing environmental pollution, with a weight value of 14%. Monte Carlo simulation determines its contribution degree and sensitivity degree to risk level classification to be 61.24% and 59.5%, respectively. The risk evaluation results show that the weak risk level of goaf accumulated water to environmental pollution exceeds 60% when there is no leakage. If the risk level rapidly changes to strong risk after the leakage of goaf accumulated water, it is urgent to implement the engineering governance method for long-term storage of goaf accumulated water combined with the environmental protection requirements of the mining area. The research results can provide theoretical basis for risk control management and green mine construction in goaf water accumulation areas.