'Five maps-three zones-two partition regions' water-preserved coal mining method

Abstract

The invention discloses a 'five maps-three zones-two partition regions' water-preserved coal mining method. The method comprises the following steps: determining an overlying strata type partition map, a bed rock thickness contour map, an aquifer watery partition map, an aquiclude thickness contour map and a coal seam thickness contour map (five maps for short) by analyzing data indexes in engineering of mining areas and hydrogeological data; calculating the heights of a caving zone, a diversion fissure zone and a protection zone (three zones for short) under cleaning mining conditions of overlying strata type partition coal seam; and meanwhile, determining the partition regions of influence degree of underwater caused by coal mining and the partition region of applicability of a water-preserved mining technology (two partition regions for short). The method provides a novel, comprehensive and systematic research method for water-preserved coal mining, the water-preserved coal mining research flow is more standard, the practicability is strong, the operation is simple and convenient, and the method is easy to understand and promote.

Description

Technical field [0001] The invention relates to the technical field of coal mining, in particular to a coal seam water-preserving mining method. Background technique [0002] Northwest China is the main producing area of ​​coal resources in China. However, the northwestern region has a dry climate and a shortage of water resources, accounting for only 3.9% of the country’s water resources. The soil structure is loose, vegetation coverage is low, sandstorm activities are intense, and land desertification is serious. As an important water source for vegetation in Northwest China, shallow groundwater is prone to seepage due to coal mining, which further deteriorates the fragile ecological environment in the region. Therefore, we must pay attention to environmental protection while mining coal, especially the protection of water resources. [0003] The concept of water-preserving coal mining was formed at the end of the last century. After years of research, water-preserving coal min...

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