采煤条件下地表水入渗特征研究  

Study on Infiltration Characteristics of Surface Water under Mining Conditions

作　　者：姚光华[1,2] 陈正华[2,3] 向喜琼[4] 

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),四川成都610059 [2]外生成矿与矿山环境重庆市重点实验室(重庆地质矿产研究院),重庆400042 [3]煤炭资源与安全开采国家重点实验室重庆研究中心,重庆400042 [4]喀斯特环境与地质灾害防治教育部重点实验室(贵州大学),贵州贵阳550003

出　　处：《矿业安全与环保》2012年第3期12-15,95,共4页Mining Safety & Environmental Protection

基　　金：重庆市国土资源和房屋管理局2010年科技计划项目;国土资源部公益性行业专项科研经费项目(200911036)

摘　　要：在采空区、采煤沉陷影响区以及影响区边界外,采用试坑渗水试验方法,结合地面水文地质调查和钻孔地下水位简易水文地质观测结果,综合分析了采煤条件下的地表水入渗特征。对比1955年与2011年两个时期的地下水位值及地表水入渗量,可以认为:采空区上方地表岩体破碎,隔水层失去隔水作用,与含水层融为统一含水体;采动影响范围以内,钻孔地下水位下降值最高达到86.30 m,地表水入渗量最高可达到未受采动影响时经验数值的31.61倍;采动影响范围以外,地表水入渗量基本不变,地下水位无明显下降。Comprehensive analysis was made on the infiltration characteristics of surface water under coal mining conditions through the seepage test in the percolation pit in the gob,the influence area of the mining subsidence and outside the boundary of the influence area and according to the hydro-geological investigation on the surface and the simple hydro-geological observation of the ground water level.Through the comparison of ground water level and surface water infiltration in 1955 and 2011,it came to the conclusions that the surface rock above the gob was broken,which caused the water-resisting layer to lose confining effect and become a water-bearing body;in the mining influence area,the ground water level in the borehole decreased up to 86.30 m and the infiltration capacity of surface water was 31.61 times of the empirical value;beyond the boundary of mining influence area,the infiltration capacity of surface water was essentially the same and ground water level had no significant decrease.

关 键 词：岩溶山区 采煤沉陷 地表水 入渗特征 

分 类 号：TD741[矿业工程—矿井通风与安全]