布尔台煤矿采空区土地复垦对涌水量的影响及灌溉水回归系数研究  

Research on the influence of land reclamation on water inflow and the irrigation water regression coefficient in goaf of Buertai Coal Mine

作　　者：杨茂林 吴宝杨 汪定武 YANG Maolin;WU Baoyang;WANG Dingwu(China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719315,China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,China Energy Investment Group,Changpin,Beijing 102209,China)

机构地区：[1]国能神东煤炭集团有限责任公司,陕西省榆林市719315 [2]国家能源集团煤炭开采水资源保护与利用国家重点实验室,北京市昌平区102209

出　　处：《中国煤炭》2024年第8期223-234,共12页China Coal

基　　金：国能集团自研项目-神东矿区多煤层开采地下水库水源运移变化及水量预测研究(E210100258);煤炭开采水资源保护与利用国家重点实验室2021年开放基金课题(GJNY-21-41-06)。

摘　　要：矿山土地复垦是解决矿山生态环境问题的主要途径之一,土地复垦后大量灌溉水涌入采空区,增大的矿井涌水量影响矿井安全。为研究煤矿采空区上部土地复垦对矿井涌水量的影响,确定采空区灌溉水回归系数,协调矿区灌溉复垦与煤矿生产关系,采用室外试验、数值模拟的方法开展采空区灌溉水回归系数研究。研究结果表明,在多年平均气象条件下,研究区黄土和砂土地区灌溉水回归系数分别为30.30%和30.38%,灌溉水需要424 d到达采空区。灌溉水达到采空区所需时间受松散层厚度以及导水裂缝带发育高度的影响,所需时间与松散层的厚度呈正比,与导水裂缝带发育高度成反比。灌溉水入渗过程存在明显的滞后效应,即松散层越厚,滞后效应越明显、月灌溉水回归系数波动越小。Mine land reclamation is one of the primary approaches to address ecological environmental concerns in mining areas.However,the process leads to a substantial influx of irrigation water into the goaf,increasing mine water inflow and adversely affecting mine safety.Aiming at investigating the influence of land reclamation above the coal mine goaf on the mine water inflow,determining the irrigation water regression coefficient in the goaf,and coordinating the relationship between irrigation and reclamation in mining areas and coal mine production,the irrigation water regression coefficient in the goaf was studied by field experiment and numerical simulation.The results indicate that under multi-year average meteorological conditions,the irrigation water regression coefficient in the loess and sandy regions of the study area are 30.30% and 30.38%,respectively,and it takes 424 days for irrigation water to reach the goaf.The time required for irrigation water to reach the goaf is influenced by the thickness of the loose layer and the development height of the water flowing fractured zone,the required time is positively correlated with the thickness of the loose layer and inversely proportional to the development height of the water flowing fractured zone.The infiltration process of irrigation water exhibits a noticeable hysteretic effect,the thicker the loose layer,the more obvious the hysteretic effect and the smaller the monthly fluctuation of the irrigation water regression coefficient.

关 键 词：煤矿采空区 土地复垦 矿井涌水量 灌溉水回归系数 入渗过程 

分 类 号：TD325.3[矿业工程—矿井建设] X171.4[环境科学与工程—环境科学]