Advancing treating method for high phreatic water level coal mining subsidence area

Abstract

The invention provided an advancing treating method for a high phreatic water level coal mining subsidence area. The advancing treating method is suitable for geological environment treating of a highphreatic water level mine subsidence waterlogged area. The advancing treating method comprises the following steps that mine geological mining data are collected; the earth surface subsidence condition is predicted through a probability integral predicting method, and an earth surface subsidence contour map is drawn; the 'digging deep to fill shallow' boundary is determined; the filling-digging earth volume of a 'digging deep to fill shallow' area and the final elevation of a 'digging deep' area are calculated; and according to the calculated h<digging> and the 'digging deep to fill shallow'boundary, the high phreatic water level subsidence waterlogged area is transformed, and advancing treating for the high phreatic water level coal mining subsidence area is achieved. The process is simple, the cost is low, the area 'digging deep' area of the subsidence waterlogged area is effectively reduced, secondary soil taking from peripheral soil is not needed, soil fertility can be guaranteed, secondary pollution is avoided, and the soil use ratio in the subsidence is greatly increased.

Description

technical field [0001] The invention mainly relates to an advanced treatment method for high-water-level coal mining subsidence areas, and is especially applicable to the advanced treatment method for high-water-level coal mining subsidence areas used in the management of geological environment in high-water-level mining subsidence water areas. Background technique [0002] Coal mining subsidence water accumulation area is a typical geological disaster caused by mining subsidence in the eastern high water level mining area. The eastern mining area generally has the characteristics of large reserves, multiple coal seams, high phreatic water level, and superimposed subsidence of the surface. Mining has caused the loss of a large amount of land resources on the surface, the destruction of the original cultivated land, and the formation of large-scale subsidence pits on the surface. Due to the comprehensive impact, water accumulated in the subsidence pit all the year round, and ...

AI Technical Summary

Problems solved by technology

In order to ensure the construction of the national economy, while a large amount of coal resources are being mined, coal mining subsidence has caused a large amount of cultivated land and villages to be lost. Taking the Lianghuai mining area as an example, by the end of 2015, the area of ​​the subsidence area that had formed reached 508km 2 , and at 20km 2 The speed per year is increasing, and at the same time, due to the comprehensive influence of high water level and surface precipitation, a large number of water areas are formed in the subsidence area, and the original terrestrial ecosystem undergoes subversive changes, transforming into an aquatic ecosystem and a water-terrestrial composite ecosystem, and dynamic subsidence forms The service function of the ecosystem is low, leading to the deterioration of the ecological environment, a large number of land in the subsidence area is abandoned, and social problems are prominent, which seriously affects the sustainable development of the subsidence area.

[0003] Conventional land reclamation and geological environment control methods in subsidence areas generally wait for the coal mining subsidence area to be completely stabilized before reconstruction. The disadvantage of this method is that it takes a long time for the coal mining subsidence area to settle. The land has been abandoned for a long time and has not been effectively used, causing a lot of economic losses

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