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前言 为查明小坝矿段的水文地质特征,在已有资料的基础上,采用群孔抽水试验取得各项水文地质参数,以阐明矿区主要充水含水层及断裂破碎带的富水性与导水性、河水与地下水的关系、抽水时产生地面塌陷的可能性,对岩溶矿区的水文地质评价具有实用意义,可供今后工作参考。 一、矿段水文地质概况 小坝矿段地面标高1169—1395米,属亚热带气候,温湿多雨,历年最大年降雨量1375.4毫米,多年平均降雨量1115.2毫米,最小年降雨量714.8毫米。最大年蒸发量1237.4毫米。年平均蒸发量1155.6毫米,最小年蒸发量1073.8毫米。相对湿度一般80%左右,最大100％,最小50％。
In order to find out the hydrogeological characteristics of small dam section, based on the existing data, we use the group hole pumping test to obtain various hydrogeological parameters to clarify the water-bearing capacity and conductivity of the main water-filled aquifer and fracture zone in the mining area The relationship between water quality, river water and groundwater, and the possibility of ground collapse when pumping water are of practical significance to the hydrogeological evaluation of karst mining area for future reference. First, the mining section of the hydrogeological profile Small dam section elevation of 1169-1395 meters, is a subtropical climate, warm and humid, the annual rainfall of 1375.4 mm, the annual average rainfall of 1115.2 mm, the minimum annual rainfall of 714.8 mm. Maximum annual evaporation 1237.4 mm. The average annual evaporation of 1155.6 mm, the minimum annual evaporation of 1073.8 mm. Relative humidity is generally about 80%, maximum 100%, minimum 50%.