Rock-soil body crack comprehensive treatment method

Abstract

The invention relates to a rock-soil body crack comprehensive treatment method. For an upper earth surface mining-induced crack area, the method mainly comprises the steps of cleaning, soil stripping, crack filling, impermeable layer laying, leveling layer backfilling and overlying soil layer construction. Fine sand and soil are matched to fill mining-induced deep fractures on the earth surface, a deep part is filled by utilizing the fluidity of the fine sand, a shallow part is filled by utilizing the cohesiveness of the soil, and the fine sand and the surrounding soil body are tightly connected into a whole under the pressure of a road roller. For a fracture area of a stope, a grouting scheme of sequentially forming rings from inside to outside is adopted, and meanwhile, a water pumping hole is formed in an insufficient mining area, so that the diffusion radius of grouting slurry is increased. A drilling floral tube is provided with spiral ribs so that the drilling floral tube can be conveniently drilled into a caving zone to break rock mass, and the balance of the amount of grout injected into each layer position is improved through evenly-formed grout outlet holes. A section of cast-in-place pile steel pipe is lengthened at the top end of the steel sleeve, and a steel bar pile of a building is directly connected with the cast-in-place pile steel pipe to serve as a building supporting pile, so that the stability of a pile foundation is greatly improved.

Description

technical field [0001] The invention relates to the field of mining fissure treatment, in particular to a method for comprehensive treatment of rock and soil fissures. Background technique [0002] Rock and soil fissures restrict the use of land resources. Many existing lands are directly abandoned due to the impact of rock and soil fissures. Under the erosion of rainwater, these lands will become worse and even cause adverse effects on groundwater resources. Mining fissures are the most common rock and soil fissures. Mining fissures generally include deep stope fissures and surface fissures. In the prior art, the treatment of mined rock and soil fissures is mainly to bury new Soil is used as farmland after reclamation, but this method requires a lot of soil, and the source of soil is few, and with the passage of time, the cracks in the deep stope are gradually compressed, causing the surface to subside into depressions again, and it is easy to cause accumulation in the rain...

AI Technical Summary

Problems solved by technology

[0002] Rock and soil cracks restrict the use of land resources. Many existing lands are directly abandoned due to the impact of rock and soil cracks. Under the erosion of rainwater, these lands will become worse and even have a negative impact on groundwater resources.

Mining fissures are the most common rock and soil fissures. Mining fissures generally include deep stope fissures and surface fissures. In the prior art, the treatment of mined rock and soil fissures is mainly to bury new Soil is used as farmland after reclamation, but this method requires a large amount of soil, and the sources of soil are few, and with the passage of time, the cracks in the deep stope are gradually compressed, causing the surface to subside into depressions again, and it is easy to cause accumulation during the rainy season. Water, difficult to continue to use, or need to continue to fill with new soil for reclamation

Using this area as a foundation makes it even more difficult to construct structures on the ground. For this, in the prior art, a method of grouting the stope cracks to improve the stability of the ground surface has also been proposed, but the stope cracks It is an invisible and inaccessible area, so the quality of the grouting reinforcement scheme has a great influence on whether the ground can be used as a foundation

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