Analysis of water-filling process in goaf of closed mine
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摘要: 为研究闭坑矿井采空区积水问题，以岱河煤矿为研究对象，根据该煤矿矿井地质、水文地质条件及已有工作面采空区探放水资料，选用回采空间法计算了该煤矿闭坑后采空区积水体积，并分析了闭坑后采空区积水过程。分析结果表明：① 岱河煤矿闭坑后采空区积水体积共6 208 267.20 m3，包括4 808 923.58 m3的工作面采空区积水体积和1 399 343.62 m3的废弃巷道积水体积。假设单位涌水量为80 m3/h，预计3 233.47 d后积水充满矿井。② 岱河煤矿闭坑后积水高度H与时间td关系表达式为H=2×10-8t3d-7×10-5t2d+0.131 7td-415.29。Abstract: In order to research water-filling problem in goaf of closed mine, taking Daihe Coal Mine as research object， mining space method was used to calculate water-filling volume in goaf of the closed mine according to geological and hydrogeological conditions of the coal mine as well as exploration and drainage data of previous working face goaf, and water-filling process in goaf of the closed mine was analyzed. The analysis results are as follows: ① Total water-filling volume in goaf after Daihe Coal Mine being closed is 6 208 267.20 m3, which includes 4 808 923.58 m3 in working face goaf and 1 399 343.62 m3 in abandoned roadways. If water bursting speed is 80 m3/h, then the closed coal mine will fully filled with water after 3 233.47 days. ② Relationship expressionbetween water-filling height (H) and time (td) is H=2×10-8t3d-7×10-5t2d+0.131 7td-415.29.
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