Treatment method of coal mining subsidence in loess hilly gully area

Abstract

The invention discloses a coal mining subsidence area administration method for a loess hilly-gully region. The method comprises the following steps: 1, measuring the width of a crack opening; 2, determining a crack administration scheme, wherein the crack administration scheme is an on-site filling method or a combined crack filling and micro-slope reconstruction administration method; 3, performing crack administration, wherein a crack to be administrated is filled with a soil body when the on-site filling method is adopted; the combined crack filling and micro-slope reconstruction administration method for administration comprises the following steps: 301, measuring an inclination angle of the crack; 302, judging an inclination angle value of the crack; 303, performing cross slope crack administration; 304, along-slope crack administration; 4, repeating step 1 to step 3 for many times until all subsided cracks in a loess slope of a coal mining subsidence area are administrated. The steps are simple, the method is reasonable in design, convenient to implement and construct and shorter in construction cycle, and has good administration effects, and the coal mining subsidence area of the loess hilly-gully region can be effectively administrated.

Description

technical field [0001] The invention belongs to the technical field of coal mining subsidence control, and in particular relates to a method for controlling coal mining subsidence in loess hilly gully areas. Background technique [0002] Coal is the most important energy in our country. With the implementation of the "strategic westward advancement" of coal development in our country, the western region has become an important energy base in our country. At present, a total of 13 large-scale coal bases have been planned across the country, of which 7 are located in the western regions such as Northwest Shaanxi, Gansu and Mongolia. Most of the mining areas in western China are located in arid and semi-arid areas, especially the typical landforms of loess hills and ravines. The loess hilly and gully area refers to the low loess loess mountainous area where the surface is cut and broken, the density of gullies is high, the vegetation coverage is low, and the water and soil ero...

AI Technical Summary

Problems solved by technology

[0003] Nowadays, there are still relatively few domestic and foreign researches on the comprehensive control technology of coal mining subsidence in loess hilly and gully areas

Especially for subsidence cracks with a width greater than 20cm, the ecological damage is serious, and some cracks lead directly to the mine. If these cracks are simply filled with existing common methods, the problem of crack recurrence often occurs, and the treatment effect is not ideal.

In this way, it not only poses a threat to underground safety production, but also is not conducive to the restoration of the ecological environment on the surface, and aggravates soil erosion. In order to promote the restoration of farmland ecology and vegetation in the collapsed crack area, comprehensive measures must be taken for governance

Therefore, there is a lack of a method for the treatment of coal mining subsidence in loess hilly and gully areas with simple steps, reasonable design, convenient implementation, and good treatment effect, which can effectively control coal mining subsidence in loess hilly and gully areas, and the construction is simple , shorter construction period

Images