Water and soil conservation method promoting recovery of vegetation in mining area exploration ground surface crack

Abstract

The invention belongs to the technical field of water and soil conservation and concretely discloses a water and soil conservation method promoting recovery of vegetation in a mining area exploration ground surface crack belt. The method comprises the following steps of (1) filling the crack, (2) measuring degraded area of two sides of the crack, (3) determining cutting branch numbers according to the area measured in the step (2) and trimming the branches, (4) immersing the branches trimmed in the step (3), and (5) cutting the branches immersed in the step (4) on two sides of the crack to form a grid. The water and soil conservation method promoting recovery of vegetation in the mining area exploration ground surface crack requires simple steps and has obvious effect and low cost.

Description

technical field [0001] The invention belongs to the technical field of water and soil conservation, and relates to a soil and water conservation method for vegetation recovery in fractured zones, in particular to a soil and water conservation method for promoting vegetation recovery in fractured zones on the mining surface in mining areas. Background technique [0002] As an important coal base in my country, Northwest China has about 4 trillion tons of coal resource reserves, accounting for about 75% of the country's existing reserves. This area has stable coal seam occurrence, thin bedrock, thick coal seam, shallow buried depth, and simple geological conditions, so it is very suitable for modern high-intensity mining. In the process of high-intensity mining, due to the large size of the coal mining face (about 200m), the comprehensive mechanized primary mining full-height (large mining height support or caving coal) is fast (the daily advancing speed is about 13m), resulti...

AI Technical Summary

Problems solved by technology

Grass grid technology is simple and easy to operate, and the main problem to be solved is windbreak and sand fixation in sandy areas. Although it also has a certain effect on soil moisture retention, this technology has two obvious shortcomings: (1) 1m×1m It has been proved that the grass grid has the best windproof and sand-fixing effect, but it is still difficult to avoid the disturbance of the eddy wind field in the center of the grass grid of this size, resulting in strong evaporation of soil moisture in the center of the grid and limited vegetation growth; (2) for making The material of the grass grid has high requirements, and it must be selected high-quality long wheat grass, and this material is not the main plant in the sandstorm area. High input cost

However, with the adjustment of my country's energy structure, the profitability of coal enterprises continues to slump, and the use of high-cost grass grid technology to restore vegetation in the mining crack zone in the northwest mining area on a large scale may be affected by the investment in the current period and the investment in material replacement in the later period. limit

[0007] The limitations of horizontal stage technology in vegetation restoration in windy and sandy areas are mainly as follows: it is difficult to solve the problem of soil wind erosion, and in northwest windy sandy landform mining areas with very little rainfall but strong evaporation, the soil moisture stored by this technology will evaporate quickly. Unable to guarantee continuous water supply during revegetation

[0008] For the mycorrhizal mycorrhizal fungus inoculation technology, its main limitations are: strong technical requirements, high cost, and no ability to improve soil moisture retention. Currently, it is difficult to promote in northwest mining areas where water resources are scarce.

Images