Optimization method of simultaneous harvest and reclamation opportunity based on mining subsidence simulation and second ploughing rate

Abstract

The invention discloses an optimization method of simultaneous harvest and reclamation opportunity of single coal layer based on mining subsidence simulation and second ploughing rate, relates to dynamic mining subsidence prediction and GIS (Geographic Information System) analysis processing, and belongs to the field of mining technology, land utilization and land rehabilitation, and the method is used for solving the problem of unstable mining subsidence land reclamation and realizing the simultaneous harvest and reclamation of underground coal mine regions. The method comprises the steps of: considering the subsidence visual simulation of landform before mining, the ground subsidence scene simulation of time domain and the optimization of the simultaneous harvest and reclamation opportunity based on the second ploughing rate on the basis of onsite file collection and analysis and based on a probability integral method and a mining subsidence predict of Knothe time function. The method disclosed by the invention performs dynamic scene simulation and reclamation opportunity optimization on the subsidence to determine the optimal reclamation opportunity under special mining conditions and natural conditions, thereby rescuing the precious surface soil resources of plain mining areas to the uttermost and planning, protecting and treating the lands to be suffered from subsidence damage in advance, so as to improve the reclamation rate, reduce the reclamation cost, promote the sustainable utilization and sustainable development of mining area land resources, and guarantee the coordination and synchronous development of coal resource mining and cultivated land protection.

Description

technical field [0001] The invention belongs to the fields of mining technology, land utilization and land reclamation, and particularly relates to dynamic prediction analysis, scenario simulation and land reclamation in the process of coal mining in plain high-water level mining areas. The timing of reclamation is optimized. Background technique [0002] China's coal resources have a large area of ​​mineral-grain composite areas, and the intensity of underground mining is high. Especially in the eastern high-water level mining areas, due to land subsidence, the damage is mainly caused by accumulated water, and a large amount of fertile soil sinks into the water, causing serious soil loss. According to years of reclamation experience in this type of area, the reclamation rate is only about 30% at the current technical level, which is very low. Large areas of high-quality farmland have been turned into water areas, which directly affects the amount of cultivated land. Reclam...

AI Technical Summary

Problems solved by technology

Because this method is carried out after the mining is completed and the subsidence is basically stable, it has the following disadvantages: (1) The soil source for reclamation is not guaranteed. Precious topsoil resources are lost and difficult to rescue; (2) The rate of reclaimed cultivated land is low. Considering passive reclamation, that is, no external solid fill, the solid fill in the study area is limited, so the rate of reclaimed cultivated land is difficult. be guaranteed

(3) The construction is difficult, involving drainage and underwater construction

(4) The quality of the reclamation project is low, and the physical and chemical indicators of the soil decrease after water accumulation, and the nutrients decrease

[0006] 1) It is difficult to grasp the dynamic process of land subsidence caused by coal mining;

[0007] 2) There are few researches on the visualization technology of landform development in the case of underground mining;

[0008] 2) During the mining process, it is difficult to effectively quantify and analyze the efficiency of reclamation at different periods

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