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由于矿井释出水时流量大,降深大,地下水不稳定状态是普遍存在的,边界对涌水量的影响也越来越显著。本文以白泉矿为例,试就边界附近的非稳定井流试验采用综合井函数法,定量评价矿井涌水量。一、矿区水文地质条件矿区主要含水层有下二叠系茅口灰岩,上二叠系长兴灰岩及白垩系底砾岩。龙潭煤系夹于茅口灰岩与长兴灰岩之间。 (一)茅口灰岩含水层(P_1m) 岩性以厚层灰岩为主,硅质灰岩次之,厚200米左
As the mine discharge water flow, a large decline, the instability of groundwater is ubiquitous, the impact of the border on the water is also more and more significant. Taking Baiquan Mine as an example, the integrated well function method is applied to test the unsteady well flow in the vicinity of the boundary to quantitatively evaluate the mine water inflow. I. Hydrogeological conditions in the mining area The main aquifers in the mine area include the Lower Permian Maokou limestone, Upper Permian Changxing limestone and Cretaceous base conglomerate. Longtan coal sandwiched between Maokou limestone and Changxing limestone. (A) The Maokou limestone aquifer (P_1m) is dominated by thick limestone, followed by siliceous limestone with a thickness of 200 meters