采空区破碎煤岩体溶蚀作用及净水机理实验研究  

Experimental study on dissolution effect and water purification mechanism of broken coal and rock mass in goaf

作　　者：王方田[1] 郝文华 张村 孙暖 熊集兵[3] 范常浩 Wang Fangtian;Hao Wenhua;Zhang Cun;Sun Nuan;Xiong Jibing;Fan Changhao(School of Mines,China University of Mining&Technology,Xuzhou Jiangsu 221116,China;School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Environment and Spatial Informatics,China University of Mining&Technology,Xuzhou Jiangsu 221116,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学(北京)能源与矿业学院,北京100083 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《矿业科学学报》2023年第4期464-473,共10页Journal of Mining Science and Technology

基　　金：国家自然科学基金(51974297,52104155);北京市自然科学基金(8212032);徐州市重点研发计划(社会发展)-社会事业(KC22283)。

摘　　要：开展地下水库采空区破碎煤岩体溶蚀作用及净水机理研究,是实现矿井地下水库安全高效运行的关键。本文以锦界煤矿31409工作面开采形成的地下水库为工程背景,选取采空区破碎煤岩体及去离子水进行污染物释放规律实验研究,分析了采空区破碎煤岩体溶蚀作用规律,探究了破碎煤岩体对水体特征影响机理,获得了破碎煤岩体在不同温度、风化条件下污染物释放规律,并分析了地下水库净水过程中的沉淀溶蚀作用。溶蚀作用及岩体中黏土矿物表面对可溶性有机质的吸附、沉淀作用等水岩作用决定了地下水库净水特征,在不同的时间范围里,溶蚀作用和吸附沉淀作用各自占主导作用,影响矿井水质。Research on the dissolution effect and the water purification mechanism of fractured coal and rock mass in the goaf area of underground reservoir is the key to realizing the safe and efficient operation of underground reservoir in mine.This paper takes the underground water reservoir formed by the mining of 31409 working face in Jinjie coal mine as example,and selects the broken coal rock mass in the mining area and deionized water for the experimental study of pollutant release law.We analyse the law of dissolution action of broken coal rock mass in the mining area,and explore the mechanism of the influence broken coal rock mass exerts on the characteristics of the water body.We discover the law of pollutant release of broken coal rock mass under different temperature and weathering degrees,and analyse precipitation and dissolution that occurs during the water purification process in underground water reservoir.The water-rock interaction of dissolution,the adsorption and precipitation of clay mineral surfaces and soluble organic matter in the rock body constitute the water purification characteristics of the groundwater reservoir,with dissolution,adsorption and precipitation each playing a dominant role in influencing mine water quality at different time scales.

关 键 词：地下水库 破碎煤岩体 水岩作用 溶蚀作用 污染物释放 

分 类 号：TD745[矿业工程—矿井通风与安全]