关键词: 底板含水层, 灰岩含水层, 首采面, 疏水降压, 水文地质参数

Abstract: In order to study the feasibility of drainage and decreasing water for aquifer of the upper limestone of Taiyuan Formation at the bottom of the first mining face in the deep mining area in Shunhe Coal Mine, based on the systematic analysis of the geology, hydrogeology and mining conditions of the first working face 2401, a new idea is put forward to prevent and control the limestone water in the bottom floor of the first working face by means of drainage and reduction water pressure. Therefore, the design implementation of the three drainage bore hole and two monitoring of underground drainage water test, the draw down water - time matching method and the line graphic method were used to match and calculate for drainage water phase and water level recovery phase , integrated to obtain the hydrogeological parameters of aquifer, the relative error basic meets the actual needs. Based on the results of drainage test, it is determined that the aquifer of the upper limestone of Taiyuan Formation at the bottom of the first wording face can be drained and lowered. Two kinds of drainage water schemes were designed and 8 drainage holes and 4 monitoring holes were designed. Through the verification of 7 actual drainage holes in the the transport roadway of 2401 working face, it was found that the water pressure drops obviously, and the drainage effect reaches the expected target. The results show that the aquifer of the upper limestone of Taiyuan Formation at the bottom of the working face has the ability of drainage. The research methods and ideas have a good reference value for the control of limestone water at the bottom of other working face under similar geological and mining conditions.