Method for confirming coal mining sunken surface soil peeling space time based on geographic information system (GIS) grid unit

Abstract

The invention relates to a method for confirming a coal mining sunken surface soil peeling space time based on a geographic information system (GIS) grid unit, belonging to the fields of mining technology, soil utilization and soil rehabilitation. The method comprises the following steps: classifying ground units, obtaining ground elevation information of every ground unit before exploring, predicting sunken by stages; obtaining the elevation property at every predict stage of every ground unit, and confirming the water accumulation time of every ground unit, thereby confirming the time of peeling surface soil of every ground unit. Through classifying the ground unit and combining the underground exploring stage, the water accumulating time of any ground unit and the time of surface soil peeling time are determined, thus the time and place of performing the surface soil peeling activity can be confirmed clearly; the method is simple and easy to understand and convenient to perform the actual construction operation, thus the surface soil protection work of a high diving water level mine zone can be specifically carried out at a fixed quantity; the method provides the guarantee for the soil rehabilitation at the later period and is beneficial to improve the rehabilitation plowing rate, and accelerate the sustainable utilization and development of the soil resource in the mine lot.

Description

technical field [0001] The invention belongs to the fields of mining technology, land utilization and land reclamation, and in particular relates to the surface soil protection work of subsidence land under coal mining in high water level-plain mining areas. The technical problem of topsoil stripping work. Background technique [0002] There are many people and little land, and arable land resources are very scarce. This is the basic national condition of our country. With the rapid development of the economy, the demand for energy is increasing day by day. Coal, as the most important energy source in my country, accounts for about 70% of the primary energy consumption. Since more than 90% of my country's coal production comes from underground mining, and most of them use longwall The whole caving mining method will inevitably lead to subsidence of the land, resulting in the subsidence and damage of a large amount of land. High water level mining areas are mainly distribute...

AI Technical Summary

Problems solved by technology

Since the service life of the working face or the mining area is long and 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 recovery rate will be affected

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