Optimization method for underground single-hole drainage of high-pressure coal seam floor water

Abstract

An optimization method for underground single-hole drainage of high-pressure coal seam floor water is provided, and is suitable for drainage of water in a high-pressure coal seam floor water-containing layer by a single borehole in mining. The method comprises: conceptually converting a tunnel in which a candidate drainage borehole position is located into a straight line segment, wherein an optimum drainage borehole position is a point that is within the straight line segment and that satisfies that a peak value of a drainage flow required by all control points during falling to a safe water level is minimum; when a to-be-drained water-containing layer is a homogenizing isotropic water-containing layer, the point is a point that a farthest distance away from each control point in a roadway straight line segment is minimum; when the to-be-drained water-containing layer is a homogenizing anisotropic water-containing layer, the point is a point that a peak value of the drainage flow required by each control point in the roadway straight line segment is minimum; and by using a genetic algorithm, solving and obtaining a coordinate of the optimum drainage borehole position and the optimum drainage flow. The method optimizes a high-pressure coal seam floor water single-hole drainage project, with mining be safe, underground water resources are protected at maximum extent, realizing an optimum balance between safety, economy and environmental protection.

Description

technical field [0001] The invention relates to a dredging optimization method, and is especially suitable for a single-hole dredging optimization method for dredging water in a highly confined aquifer on a coal seam floor through a single borehole. Background technique [0002] During the mining of coal resources, due to the high head pressure of the aquifer under the coal seam floor, under mining conditions, highly pressurized water can easily break into the mine and cause water inrush disasters. As the mining depth gradually increases, the water pressure on the coal seam floor The higher the pressure, the higher the risk of water inrush. Drainage and depressurization is one of the main measures to prevent water inrush from the mine floor. The water in the main water-filled aquifer that threatens mine safety production is drained under artificially controlled conditions through drilling or other drainage facilities to reduce the water level. Below the pre-designed safety ...

AI Technical Summary

Problems solved by technology

The essence of this method is to discretize the roadway space into several points, and search for the best well position in the set of discrete points, but the roadway itself is a continuous space, and the traditional model is essentially an approximate optimization, especially in single-hole dredging projects. In the optimization, the precise coordinates of the best position of the borehole are directly related to the size of the total drainage volume, and the solution obtained by the discrete point set search is likely to be inferior to the optimal solution obtained by the continuous model, so that the total drainage volume is still high, reaching For the real optimization purpose, there is no optimization method and model for searching in the restricted continuous space of roadway

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