Advanced treatment method based on boundary optimization and for digging deep to fill shallow, and used for high-groundwater-level mining subsidence area

Abstract

The invention provides an advanced treatment method based on boundary optimization and for digging deep to fill shallow, and used for a high-groundwater-level mining subsidence area. The advanced treatment method is appliable to geological environment treatment for a subsidence waterlogged area of a high-groundwater-level mining area. The advanced treatment method comprises the following steps: collecting the geological parameters of the mining area at first, and designing elevations after digging deep to fill shallow, of surface points above a main strike section of an underground mining working face; evaluating the boundary points of digging deep to fill shallow, on the main strike section, and the boundary lines of digging deep to fill shallow, for a subsidence basin according to the subsidence values of the surface points above the main strike section of the underground mining working face and the elevation values after digging deep to fill shallow; and designing an elevation of excavation and filling soil of an area for digging deep to fill shallow and a shallow-filled area in the subsidence basin, and a final elevation after treatment, and completing filling construction forthe subsidence area. The advanced treatment method is simple in process and low in cost; a subsidence area is effectively reduced; and soil does not need to be taken from the surrounding land, so thatthe fertility of covering soil can be guaranteed, and the risk of secondary pollution is lowered.

Description

technical field [0001] The invention mainly relates to an advanced treatment method, and is especially suitable for a shallow advanced treatment method for digging deep pads in high-water-level coal mining subsidence areas based on boundary optimization used in high-water-level mining 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 after decades of repeated mining, surface subsidence p...

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] In the conventional subsidence area, the excavation depth is shallow, and the reconstruction is generally carried out after the coal mining subsidence area is completely stable, and only the engineering needs are used to distinguish the excavation depth area from the filling area. The disadvantage of this method is that the settlement time of the coal mining subsidence area After the environmental governance is completed, a large amount of land in the subsidence area has been abandoned for a long time and has not been effectively used; the rough excavation and filling has not designed a reasonable boundary for water and soil conservation, and the division between the deep excavation area and the shallow pad area is not clear, and it needs to be obtained from the outside world. Soil, causing secondary disturbance to the environment

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