Coal mining ground fissure moisture damage detection method taking space-time difference and rainfall impact into consideration

Abstract

The invention relates to a coal mining ground fissure moisture damage detection method taking space-time difference and rainfall impact into consideration, and belongs to the technical field of environmental monitoring. The method comprises the following steps: establishing a spatial coordinate system for ground and underground comparison, and selecting an undisturbed area at the front end of the working plane mining progress as a moisture monitoring area; determining moisture background value and moisture spatial distribution of the monitoring area; acquiring fissure position located in a moisture contour line, of the monitoring area; determining soil moisture background value around a fissure; actually measuring the soil moisture background value around the fissure in the whole ground fissure development cycle; correcting moisture content in which rainfall impact is excluded; and obtaining moisture content in which spatial variability impact is removed. By adopting the method provided by the invention, the moisture damage impact of ground fissure on the surrounding soil can be more fully and scientifically grasped to provide data information for regional land reclamation and ecological environment.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a monitoring method for ground fissure water damage in an underground coal mining area. Background technique [0002] Desertification and potential desertification are serious in windy and sandy areas. The thin topsoil particles overlying the sand layer are relatively loose, and human disturbance or inclement weather will cause them to disperse rapidly and cause soil erosion. These conditions and factors ultimately lead to a very fragile ecological environment in this area. Relevant studies have shown that coal mining has a corresponding negative impact on the ecological environment of the region, and its main damage forms are subsidence caused by surface movement and deformation, surface cracks, and soil quality damage caused by this. China's underground coal mines mostly adopt long-arm mining and caving roof management methods, and the overlying s...

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Problems solved by technology

[0004] The above research conclusions are not the same. There is no unified conclusion on the degree of impact of coal mining subsidence on water in windy and sandy areas. The reason may be that the water loss in the sandy area has a specific evolution process. It is bound to have an impact

Therefore, it is necessary to study the dynamic evolution law from the perspective of the whole process of mining damage, and the previous research mainly focused on sampling and analyzing the land after subsidence, and lacked dynamic monitoring of water damage.

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