A Boundary Optimization Based Shallow-Advance Control Method of Digging Deep Pad in Subsidence Area of ​​High Water Level Coal Mining

Abstract

The invention provides a boundary optimization-based method for the treatment of the subsidence area of ​​the high water level coal mining subsidence area, which is suitable for the management of the geological environment of the subsidence water area of ​​the high water level mining area. Firstly, the geological parameters of the mining area are collected, and the elevation of each surface point directly above the main section of the underground coal mining face is designed; Elevation value, calculate the boundary point of excavation depth and shallow cushion on the main cross section of the trend and the boundary line of excavation depth and cushion shallow in the subsidence basin; design the excavation and fill elevation of the excavation depth and cushion shallow area and shallow cushion area in the subsidence basin and the final result after treatment elevation, and complete the filling construction of the subsidence area. The process is simple, the cost is low, and the subsidence area is effectively reduced. There is no need to take soil from the surrounding land for a second time, which can not only ensure the fertility of the covering soil, but also reduce the risk of secondary pollution.

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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