Five diagrams-three zones-two zones water conservation coal mining method

Abstract

Provided is a "five maps-three zones-two sub-areas" water-preserved coal mining method. The method comprises: analyzing data indexes in mining area engineering and hydrogeological data; determining an overlying strata type sub-area map, a bedrock thickness contour map, an aquifer water yield property sub-area map, an aquifuge thickness contour map and a coal seam thickness contour map (referred to as "five maps" for short); according to the "five maps", calculating the height of a caving zone, a water flowing fractured zone and a protection zone (referred to as "three zones" for short) under the condition of completely mining coal seams in different overlying strata type sub-areas; and also determining, in combination with the bedrock thickness, the aquifuge thickness and the aquifer water yield property, a sub-area for the degree of influence of coal mining on underground water, and a sub-area for the applicability of a water-preserved coal mining technique (referred to as "two sub-areas" for short). The method provides a new, comprehensive and systematic research method for water-preserved coal mining, and the method makes a water-preserved coal mining research process more standard, has strong practicability, and is simple and convenient to operate, and is easy to understand and popularize.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a coal seam water conservation mining method. Background technique [0002] Northwest China is the main production area of ​​coal resources in China. However, the northwest region has a dry climate and water shortages, accounting for only 3.9% of the country's water resources. The soil structure is loose, the vegetation coverage is low, the wind and sand activities are strong, and the land desertification is serious. Shallow groundwater, as an important water source for vegetation in Northwest China, is prone to seepage due to coal mining, further deteriorating the fragile local ecological environment. Therefore, environmental protection must be paid attention to while mining coal, especially the protection of water resources. [0003] The concept of water-retaining coal mining was formed at the end of the last century. After years of research, water-retaining coal mining h...

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Problems solved by technology

However, because the experts and scholars who study water-conservation coal mining come from different professional fields such as mining, mechanics, and environmental ecology, their research methods and emphases are different. Therefore, there is no comprehensive, systematic and standardized research method in the field of water-retaining coal mining research.

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