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

A technology of hydrogeology and water release test, applied in drainage, mining equipment, earthwork drilling, etc., can solve the problems of limited influence range, difficult calculation, multi-scale exploration of mine hydrogeological conditions, etc.

Inactive Publication Date: 2015-05-06
HENAN POLYTECHNIC UNIV
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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

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Embodiment Construction

[0012] In the following text, the invention will now be described more fully, illustrating various embodiments. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0013] The invention combines the steady flow and the unsteady flow water discharge test to carry out the three-fall unsteady flow water discharge test.

[0014] 1. Set the water discharge volume of each drop according to the requirements, and the sum of the maximum water discharge volume and the water inflow of the mine cannot exceed the drainage capacity of the mine;

[0015] 2. The sequence of water discharge should be small flow water first, and then increase the water discharge step by step. The amount of water released should be Q 3 =Q max , Q 2 =2...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N33/24E21F16/00
Inventor 潘国营武亚遵林云蔡二贝秦永泰
Owner HENAN POLYTECHNIC UNIV
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