An optimization method for dredging and dredging of single holes under high pressure water wells on the coal seam floor

Abstract

The invention discloses an optimization method for single-hole dredging of coal seam floors under highly confined water wells, which is suitable for dredging water in highly confined aquifers of coal seam floors through a single borehole in mining. Including the generalization of the roadway where the candidate location of the dredging drilling is located into a straight line segment, the optimal dredging drilling position is the point in the straight line segment where the maximum dredging flow required to meet the safe water level drawdown at each control point reaches the minimum. When the degraded aquifer is a homogeneous and isotropic aquifer, this point is the point on the straight section of the roadway where the distance from each control point reaches the minimum; when the aquifer to be degraded is homogeneous and anisotropic, this point is On the straight line section of the roadway, the point at which the maximum value of the drainage flow required by each control point reaches the minimum, is solved by genetic algorithm to obtain the precise coordinates of the best drilling position and the best drainage flow. This method optimizes the dredging project of high confined water single hole in the coal seam floor, and under the premise of safe mining, it can maximize the protection of groundwater resources and achieve the best balance of 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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