Shallow surface ecological water protection method based on the hysteresis effect of the key layer of mining space

Abstract

The invention discloses a shallow surface ecological water protection method based on the stagnation effect of key layers in mining space, utilizes the development and closure of hard rock layers (key layers) to separate layers and has a certain delay time, and according to the theory of key layers and the mechanical strength of rock layers, finds out-of-surface layers One or more key layers that are nearest and have a certain development delay time, drill holes in the key layer in advance, and set up a monitoring system in the hole; when the separation layer develops below the key layer, the monitoring system automatically recognizes and starts The grouting pump performs rapid grouting, and fills the separation space with grout before the key layer is broken and bent to block the upwardly conductive mining space, so as to prevent the mining from damaging the shallow rock formation and shallow surface water, and at the same time increase the The strength of the rock mass structure forms a "protective circle" for the shallow surface rock formation, prevents the loss of shallow surface water and surface subsidence, and protects the surface ecological water level, which is beneficial to the ecological protection of the ecologically fragile areas in the west.

Description

technical field [0001] The invention relates to the technical field of shallow ecological water protection. Specifically, it is a shallow ecological water protection method based on the stagnation effect of key layers in mining space. Background technique [0002] In recent years, with the long-term continuous high-intensity mining of coal resources and the gradual depletion of coal resources in the eastern region, the western region has gradually become the main producing area of ​​coal resources in my country. The total coal resources account for 78% of the country's total coal. However, the western region has arid climate and low vegetation coverage. At the same time, this region is also seriously deficient in water resources, accounting for only about 3.9% of the country's water resources. As an important water source for vegetation in this area, shallow water (surface water and Quaternary diving) is prone to seepage and water level drop due to coal mining, further dete...

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Problems solved by technology

[0007] However, due to factors such as the complexity of the research object and the limited technical means, the theoretical research on the damage mechanism of the rock structure, the temporal and spatial evolution law and mechanism of the mined rock layer is not deep enough and detailed; the technical cost of water conservation technology is also too high , serious waste of resources, poor technical effectiveness and other problems have made it difficult to popularize and apply the implemented water conservation technical measures, resulting in frequent damage to water resources in mining areas, and the ecological environment damage situation in western mining areas is still very severe

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