A method for classifying the hazard degree of phreatic leakage in shallow-buried coal seam mining

Abstract

The invention relates to a method for classifying the hazard degree of phreatic leakage in shallow-buried coal seam mining, belonging to the field of coal mining protection, and is used to solve the problem that the hazard degree of leakage and leakage of the overlying phreatic layer in the coal mining area cannot be accurately judged at present. The present invention includes the following steps: S1. arranging monitoring points on the coal mine working face and burying a telemetry water level gauge to monitor the water level; S2. monitoring the ground elevation, calculating the ground subsidence and collecting footage data; S3. using the monitoring data to calculate the distance from the footage to the monitoring point - The relationship curve of land subsidence and water level change; S4. Compare the curve made with the submerged non-missing map, micro-loss map and large-scale leakage map and divide the degree of leakage; S5. Further divide the study area into an environmental disaster area or a friendly area. The classification method of the invention is simple and practical, and from the perspective of ecological protection, it makes targeted judgments on the leakage of water resources in the shallow layer of the northwest coalfield and environmental disasters, provides a basis for the selection of the mining mode in the mining area, and has the advantages of ecological protection in the mining process of the northwest coalfield. important meaning.

Description

technical field [0001] The invention relates to the technical field of ecological protection, in particular to a method for dividing the degree of disaster caused by diving leakage in shallow coal seam mining. Background technique [0002] Due to the gradual depletion of coal resources in the eastern region of my country, the westward shift of coal production strategy will continue to accelerate, so the coal mining volume in the west will increase year by year. It is estimated that the coal production in the west will account for more than 70% of the country's total coal production in the future. Northern Shaanxi has huge reserves of coal resources, and the quality of the coal is good, so the prospect of mining is broad. At the same time, northern Shaanxi is an arid-semi-arid area, with a serious shortage of water resources and a fragile ecological and geological environment, which seriously restricts and affects regional economic and social development. The phreatic water ...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a method for dividing the disaster-causing degree of phreatic leakage in shallow coal seam mining, so as to solve the problem that it is impossible to accurately judge the leakage degree and disaster-causing situation of the overlying phreatic layer in the coal mining area; According to the level of layer leakage and disaster-caused division, formulate corresponding water conservation mining plans, so as to minimize the ecological environment damage caused by mining

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