A Personalized Method for Determining the Risk Level of Floor Water Inrush in Coal Mining Faces

Abstract

The invention discloses a method for individually determining the danger level of water inrush from the floor of a coal mining face, belonging to the field of coal safety mining. This method comprehensively considers the factors such as the water pressure of the coal mining face floor, the thickness of the water-resisting layer, the damage phenomenon of the coal seam floor pressure, the lithology combination of the rock strata in the water-resisting section, and the development of the original conduction of groundwater under pressure on the floor, and establishes the relationship between these influencing factors and the outburst. The implicit function dependence of the water inrush hazard level is analyzed through interpolation to establish a comprehensive evaluation index system for evaluating the water inrush hazard level of the floor. This method comprehensively considers various factors that affect the threat of water inrush from the coal mining floor, and establishes the functional dependence relationship between each influencing factor and the water inrush coefficient. The problem of functional dependence of water coefficient provides a new method for calculating water inrush coefficient.

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≤...

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