Steel tube truss grouting reinforcing and supporting structure for high-stress weak broken surrounding rocks

Abstract

The invention discloses a steel tube truss grouting reinforcing and supporting structure for high-stress weak broken surrounding rocks. The steel tube truss grouting reinforcing and supporting structure comprise five-way connectors, mandrels, assisting rods, shoulder rods and grouting anchor rods. Each five-way connector comprises five communicated ports, and the mandrels, the assisting rods, the shoulder rods and the grouting anchor rods are installed on the five ports and form supports with the five-way connectors as the center. The four supports are connected together to form a square framework structures with the four five-way connector as the top points. Each square framework is provided with a square framework having the same structure with the square framework along two sides of the axial direction of the first ports of the five-way connectors. Every two adjacent square frameworks are integrally connected through the shoulder rods to form a multi-connection structure with the single square frameworks as the base. The steel tube truss grouting reinforcing and supporting structure has the advantages of being large in initial supporting force, high in supporting strength, good in integrity, large in the supporting top control area, strong in surface protection strength, simple and convenient to construct, safe and reliable, and being capable of greatly improving the stability of loose surrounding rocks.

Description

technical field [0001] The invention relates to the field of underground mining, in particular to a steel pipe truss grouting reinforcement and support structure for high-stress weak and broken surrounding rock. Background technique [0002] There are many goafs caused by the early mining of underground mining, and with the deepening of the mine, the mining environment will become more and more complex. Loose and broken surrounding rock masses are often encountered in the excavated roadways. The overall performance of this loose surrounding rock mass Poor, limited bearing capacity, under the action of high ground stress and disturbance stress, it may lead to the phenomenon of collapse or large deformation with excavation. [0003] At present, when excavating and maintaining roadways with loose surrounding rock masses, pile wedges, advanced anti-bottom arches are generally used to fix anchor rods and pipe sheds, and pre-grouting are used for advanced support. It has played a...

AI Technical Summary

Problems solved by technology

[0002] There are many goafs caused by the early mining of underground mining, and with the deepening of the mine, the mining environment will become more and more complex. Loose and broken surrounding rock masses are often encountered in the excavated roadways. The overall performance of this loose surrounding rock mass Poor, limited bearing capacity, under the action of high ground stress and disturbance stress, it may lead to the phenomenon of collapse or large deformation with excavation

[0003] At present, when excavating and maintaining roadways with loose surrounding rock masses, pile wedges, advanced anti-bottom arches are generally used to fix anchor rods and pipe sheds, and pre-grouting are used for advanced support. It has played an important role in maintaining and ensuring the construction safety of workers, but the shortcomings of these technologies, such as complex operation, small scope of application and high cost, make it difficult to be widely used in coal mine fracture zones, and after tunneling and support Due to the high loosening pressure, it is easy to make the surrounding rock unstable or the roof fall, especially in the high-stress broken rock mass. Very easy to generate a lot of kick drum

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