Determining the Timing of Stripping Topsoil While Mining and Recovering Based on Element Method

Abstract

The invention relates to a unit method based mined and reclaimed topsoil stripping time determining method, belonging to the fields of mining technology, land utilization and land reclamation. The unit method based mined and reclaimed topsoil stripping time determining method comprises the following steps: acquiring the natural condition, geological condition and mining plan information of the area with a coal bed, and dividing the coal bed to be mined into a plurality of mining units along the mining direction according to time or mining length; obtaining the sinking isolines at each mining period of the mining units by adopting the probability integral method; determining the topsoil stripping start distance; and determining the real-time topsoil stripping start angle, topsoil stripping end angel and topsoil stripping segment. The precious topsoil resources in the mining area of the plain can be rescued reasonably and timely, and the soil resource on the land to be subjected to subsidence damage can be protected in advance, thus the later-stage land reclamation can be guaranteed, the land reclamation rate can be improved, and the sustainable use and development of the land resources in the mining area can be promoted.

Description

technical field [0001] The invention belongs to the technical field of mining technology, land utilization and land reclamation, and particularly relates to the surface soil rescue technology of coal mining subsidence land in the coal mining process of high water level-plain mining area. , termination angle) these two parameters are constrained, and the time and range of surface soil stripping are determined differentially under the influence of different mining units. Background technique [0002] There are many people and little land, and the arable land resources are very scarce. This is the basic national condition of China. With the rapid development of the economy, the demand for energy is increasing day by day. As China's most important energy source, coal accounts for about 70% of the primary energy consumption. Since more than 90% of China's coal production comes from underground mining, and most of them use longwall The whole caving mining method will inevitably l...

AI Technical Summary

Problems solved by technology

Since the service life of the working face or the mining area is long or short, and the service life of the larger working face even reaches one or two years, the premature stripping of the topsoil will affect the normal agricultural production activities, and it is difficult to implement , the topsoil stripping time is too late, it will cause the stripping efficiency to decrease, the salvaged topsoil resources will decrease, and the replanting rate will be affected

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