荥巩煤田分布在巩县、荥阳、新郑三县范围内,煤田外有陇海和京广两大铁路干线横穿,交通十分方便,矿区开采石炭系一_1煤(炭煤)及二迭系二_1煤(黄煤)。现有市县矿四对(大峪沟、新中、王河、徐庄),1987年生产原煤131.7万吨,该煤田保有地质储量8.7亿吨,可以建成240～300万吨/年的生产能力。 一、底板水的危害和防治意义 Gonggong coalfields are distributed within the scope of Gongxian, Xingyang and Xinzheng counties. There are two major railway lines Longhai and Jingguang outside the coalfield. Traffic is very convenient. Department of two _1 coal (yellow coal). There are four pairs of cities and counties (Dayugou, Xinzhong, Wanghe and Xuzhuang), producing 1.137 million tons of raw coal in 1987. The coalfield reserves 870 million tons of geological reserves and can produce between 2.4 and 3 million tons / year of production ability. First, the floor water hazards and prevention and treatment