Classification Method of Mined Rock and Soil Mass Equilibrium Structure under Thick Loose Layer Condition

Abstract

The invention discloses a rock-soil mass mining balance structure classifying method under thick unconsolidated formation condition. The rock-soil mass mining balance structure classifying method comprises the following specific steps that (1) a geological survey is conducted in a mining area, (2) mining factors of the mining area are determined; (3) the critical arch height h0 of a main rock arch and the critical arch height h'0 of an auxiliary rock arch of an overlaying rock-soil layer mining balance arched structure are determined; (4) the forming or fracture condition of a rock-soil arch is judged according to the critical arch height h0 of the main rock arch, the critical arch height h'0 of the auxiliary rock arch, the comparison between the thickness of base rock and the thickness of the unconsolidated formation and the water containing conditions of the base rock and the unconsolidated formation; and (5) according to the formation or fracture condition of the rock-soil arch, the type of the overlaying rock-soil layer mining balance arched structure is determined, and mining balance arch structure models of the overlaying rock-soil layer under different mining states are determined. The two modes of ground surface movement evaluation based on transverse mining adequacy and evaluation of three rock layer moving zones in the vertical direction are integrated, and a novel evaluation system for rock-soil mass mining subsidence under the thick unconsolidated formation condition is built.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a method for classifying the balance structure of mining rock and soil under the condition of thick loose layers. Background technique [0002] Mining subsidence is related to more than 10 geological and mining change factors, which are complex and difficult to study. There are still some problems in the description of the relationship between mining subsidence and geological mining conditions: 1) The description of rock formation failure is out of touch with the law of surface movement, and the description of continuous basins in surface movement is out of touch with the description of surface cracks and steps; 2) The "three zones" of rock formation movement describe deformation The degree of zoning characteristics, some conditions are described as "three zones" but incomplete and inappropriate; 3) The adequacy of mining is a description of the degree of lateral mining on the surface,...

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Problems solved by technology

[0002] Mining subsidence is related to more than 10 geological and mining change factors, and the problems are complex and difficult to study

There are still some problems in the description of the relationship between mining subsidence and geological and mining conditions: 1) The description of rock formation failure is out of touch with the law of surface movement, and the description of continuous basins in surface movement is out of touch with surface cracks and steps; 2) The "three zones" of rock formation movement describe deformation The degree of zoning characteristics, some conditions are described as "three zones" but incomplete and inappropriate; 3) The adequacy of mining is the description of the degree of lateral mining on the surface, and the relationship between the adequacy of mining and the movement of rock formations is rarely studied. Few studies have been conducted on the influence of vertical mining degree and the interaction between vertical and horizontal mining degree on rock formation and surface

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