Three-drop distance non-steady flow dewatering test method for probing mine hydrogeology

Abstract

The invention relates to a three-drop distance non-steady flow dewatering test method for probing mine hydrogeology. According to the technical scheme of the invention for solving the problem, steady flow and non-steady flow dewatering tests are combined for a three-drop distance non-steady flow dewatering test; by implementing the dewatering test, the water storage property of a drainage water-bearing layer of a mine is evaluated based on the falling rate of water level of observation holes according to acquired test information; the watery property of the drainage water-bearing layer is evaluated by virtue of unit inflow of each drop distance and the draining property of the drainage water-bearing layer is evaluated according to a ratio of drawdown and the water inflow. The method not only can probe hydrogeological conditions of the mine in multiscales, but also can acquire abundant test data, and provides probability of establishing a mine inflow prediction model and predicting the mine inflow under a drainage water condition in the future by various methods such as a flow-drawdown correlation curve method, a steady flow analytical method, a non-steady flow analytical method and a numerical simulation method, thereby providing guarantee for correctly evaluating hydrogeological conditions of the mine.

Description

technical field [0001] The invention relates to a three-fall unsteady discharge water test method for exploring mine hydrogeological conditions, belonging to the field of mine geological exploration. Background technique [0002] Water release test is one of the effective methods to detect mine hydrogeological conditions. It makes use of the fact that the elevation of the underground roadway or the elevation of the water discharge borehole is lower than the water level of the aquifer, so that the confined water flows into the mine by itself, forming a certain scale of water level drop funnel in the aquifer, and revealing the hydrogeological characteristics of the mine. phenomenon, so as to detect the hydrogeological conditions of the mine and predict the water inflow of the mine. Most of the current water release tests are unsteady flow with single drop, which may not be able to comprehensively and multi-scalely explore the hydrogeological conditions of the mine due to the ...

AI Technical Summary

Problems solved by technology

Most of the current water release tests are unsteady flow with single drop, which may not be able to comprehensively and multi-scalely explore the hydrogeological conditions of the mine due to the limited scope of influence (especially for the karst fracture aquifer); on the other hand, it can only Using unsteady analytical method or numerical simulation method to predict water inflow and reverse hydrogeological parameters may face the problem that the hydrogeological boundary conditions do not meet the unsteady well flow conditions, or the process of establishing numerical models is complicated, making calculation difficult