Method for determining floor water inrush danger level of coal mining working faces in personalized manner

Abstract

The invention discloses a method for determining floor water inrush danger level of coal mining working faces in a personalized manner, and belongs to the field of coal safety mining. Factors such as water pressures of floors of the coal mining working faces, the thicknesses of water-insulation layers, destruction phenomena of floors of coal seams due to mine pressures, lithological combinations of rock strata of water-insulation sections and original guide rise and development phenomena of floor confined underground water are comprehensively considered, implicit functional dependency relationships between the influence factors and the water inrush danger level are established, and comprehensive evaluation index systems for evaluating the floor water inrush danger level can be established by means of interpolation analysis on sudden change points of implicit functions. The method has the advantages that the various factors which can affect coal mining floor water inrush thread are comprehensively considered, the functional dependency relationships between the various influence factors and water inrush coefficients are established, accordingly, the difficult problem that only water pressures and the thicknesses of water-insulation layers are considered in the traditional method or functional dependency relationships between influence factors and water inrush coefficients cannot be established is solved, and the novel method can be provided for computing the water inrush coefficients.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety mining, and in particular relates to a method for individually determining the risk level of water inrush from the floor of a coal mining working face. Background technique [0002] At present, the water inrush coefficient method is mainly used to evaluate the risk of floor water inrush in coal mine safety mining. The formula for calculating the water inrush coefficient T=p / M was proposed by the Hungarian engineer Wegflens on the concept of water-repelling thickness (T=M / p) during the 1964 Jiaozuo Hydrogeological Conference in my country. In the formula, p is the water content of the coal seam floor layer hydraulic pressure, and M is the thickness of the coal seam floor water-resisting layer. After the formula was put forward, based on the floor water inrush cases and basic data in Jiaozuo, Fengfeng, Jingxing, Handan, Feicheng, Zibo and other Dashui mining areas, it was calculated that T≤...

AI Technical Summary

Problems solved by technology

[0005] 1. Factors affecting the risk of water inrush are not fully considered

[0006] The calculation formula of the water inrush coefficient only considers the water pressure and the thickness of the water-resisting layer, and does not consider the relevant factors such as the damage degree of the coal seam floor pressure, the rock formation lithology combination of the water-resisting section, the groundwater conduction height of the floor under pressure, and the water-rich index of the aquifer.

[0007] 2. No machine learning method was used to establish the functional dependence between the risk of water inrush and its influencing factors

[0010] It can be seen from the calculation formula T=p / M that the current water inrush coefficient only considers the water pressure of the coal seam floor aquifer, the thickness of the coal seam floor water-resisting layer and other factors, and has nothing to do with the actual water inrush volume

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