摘要
孙庄矿井田位于黑龙洞泉域的西南部强径流带上,受水文地质条件影响,深部开采表现出了与浅部开采不同的水文地质规律,深部开采受双重水害威胁。目前,矿井经过近50 a的开采,剩余可采储量为332.3万t,其中受大青灰岩水和奥灰水威胁的深部山青煤为247.2万t,占全矿井可采储量的74.4%,如不解放受水威胁的深部山青煤,矿井将面临关闭的严峻局面。为解决防治水技术难题,通过对矿井水文地质条件进行分析,决定采用地面区域治理的方法对大青灰岩含水层进行注浆加固,使其改造为弱含水层或相对隔水层,阻断了奥灰含水层对上伏薄层灰岩的补给通道,增强了煤层底板的阻隔水能力,来解决矿井深部山青煤层开采受“双重”水害威胁的难题。
Sunzhuang mine field is located in the strong runoff zone in the southwest of Heilongdong spring area.Affected by hydrogeological conditions,deep mining shows different hydrogeological laws from shallow mining,and deep mining is threatened by double water damage.At present,after nearly 50 years of mining,the remaining recoverable reserves of the mine are 3.323 million tons,of which the deep Shanqing coal threatened by Daqing limestone water and Ordovician limestone water is 2.472 million tons,accounting for 74.4%of the total mine recoverable reserves.If the deep Shanqing coal threatened by water is not liberated,the mine will face a severe situation of closure.In order to solve the technical problem of water prevention and control,through the analysis of the hydrogeological conditions of the mine,it was decided to use the method of surface regional control to grout and reinforce the Daqing limestone aquifer,so that it could be transformed into a weak aquifer or a relative aquiclude,which blocked the supply channel of the Ordovician limestone aquifer to the overlying thin limestone,and enhanced the water barrier capacity of the coal seam floor,so as to solve the problem that the mining of deep Shanqing coal seam was threatened by'double'water damage.
作者
武文清
Wu Wenqing(Jizhong Energy Fengfeng Group Co.,Ltd.,Handan 056200,China)
出处
《煤炭与化工》
CAS
2023年第8期50-53,共4页
Coal and Chemical Industry
关键词
强径流带
深部
阻断
加固
治理
strong runoff zone
deep
blocking
reinforcement
control
