Filling mining overlying rock fault zone height determining method based on plate and shell theory

Abstract

The invention belongs to the field of coal mine filling mining rock layer control, and particularly relates to a filling mining overlying rock fault zone height determining method based on a plate and shell theory. The method comprises the following steps of firstly, judging the position of a hard rock layer; then, obtaining the critical load and the limit displacement of the hard rock layer; next, obtaining the free space height under the hard rock layer and the overlying load on the hard rock layer; and judging whether the fault zone develops or not by comparing the critical load with the overlying load on the hard rock layer and comparing the limit displacement with the free space height under the hard rock layer. Various basic parameters related in the method can be obtained after working face mining design completion by methods such as geological data and experiment tests. The method has the advantages that the theoretical and data basis can be provided for the overlying rock damage prevention and treatment measures adopted in the filling mining process; and the disaster due to filling mining working face overlying rock damage is reduced. The method provided by the invention has wide practicability on the analysis of the filling mining overlying rock activity rule.

Description

technical field [0001] The invention belongs to the field of rock formation control in coal mine filling mining, and in particular relates to a method for determining the height of a fault zone in filling mining based on the plate shell theory. Background technique [0002] The overlying rock activity is caused by the mining of the underground coal seam; when the coal seam is mined, the stress balance of the underground original rock is destroyed, and the rock layer begins to move and deform, and this phenomenon will continue to pass upward until a new equilibrium state is reached ; For a long time, various related theories in the field of rock formation control have emerged in an endless stream, such as: the former Soviet Union's Hyprut and Awelshin proposed the roof "arch" structure; Polish scholar Litvenishin and others applied granular mechanics A stochastic medium theory method for predicting rock formation and surface subsidence was established; Liu Changyou, a Chinese...

AI Technical Summary

Problems solved by technology

However, the previous theories cannot provide systematic and complete analysis methods and data support for the development degree and stop development position of the overlying rock fault zone under the condition of filling mining, which restricts the prevention and control of overlying rock failure disasters under the condition of filling mining

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