贵州省大方县五凤井田水文地质特征初探

五风井田位于贵州省大方县城东侧，面积89.22km^2，含煤地层为二叠系上统龙潭组，主要可采煤层为6中、26、33号煤层，煤炭总资源量26 130万t。井田内主要含水层为三叠系茅草铺组岩溶溶洞含水层（T1m），夜郎组玉龙山灰岩岩溶裂隙含水层T1y2），二叠系中统长兴组岩溶裂隙含水层（P3c）、茅口组岩溶溶洞-暗河含水层（P2m）。矿床属于以岩溶充水为主，水文地质条件中等的矿床。井田的充水水源为地表水、地下水和小煤矿、采空区的老窑积水，充水通道为断裂破碎带及采矿冒落裂隙带。

An Elementary Discussion on Hydrogeological Features in Wufeng Minefield, Dafang County, Guizhou Province

The Wufeng minefield is locating to the east of the Dafang county seat with an area of 89.22km^2, coal-bearing strata is Upper Permian Longtan Formation, main mineable coal seams have Nos.6m, 26 and 33, total coal resources 261.3 million tons. Main aquifers have Lower Triassic Maocaopu Formation karstic cave aquifer （T1m）, Yelang Formation Yulongshan limestone karstie fissure aquifer （T1y2）, Upper Permian Changxing Formation karstic fissure aquifer （P3c） and Middle Permian Maokou Formation karstic cave-sunken stream aquifer （P2m）, the coalmine belongs to mainly karstic water filling, moderate hydrogeological condition coalmine. Minefield water filling sources have surface water, underground water and small mine worked-out area gob water, water filling channels have shattered fault zones and mining caving zones.