A grouting system for extremely fragile roadway surrounding rock and its fire prevention and extinguishing method

Abstract

The invention discloses a slurry injection system for roadway surrounding rocks easy to smash and a fire prevention and extinguishing method thereof. The slurry injection system for the roadway surrounding rocks easy to smash comprises a slurry preparation device, wherein the slurry preparation device comprises a slurry preparation container, a stirring shaft, a pneumatic motor and a slurry pump,an air inlet end of the pneumatic motor communicates with a ventilating pipeline through a gas pipeline and a three-way connector I, a slurry outlet of the slurry preparation container communicates with an inlet of the slurry pump through a pipeline, an outlet of the slurry pump communicates with a three-way connector II through a slurry injection pipeline, an air inlet end of a foaming tank communicates with the ventilating pipeline through a gas pipeline and a three-way connector III, a discharging end of the foaming tank communicates with a first feeding port of a mixing device through a pipeline, a second feeding port of the mixing device communicates with the slurry outlet of the slurry preparation container, a discharging end of the mixing device is connected with a mixed material output pipe, and a plurality of mixing blades arranged in a stagger mode are arranged in the mixing device. The slurry injection system for the roadway surrounding rocks easy to smash can block gaps ofthe roadway surrounding rocks easy to smash, and simultaneously can reinforce the roadway surrounding rocks, and finally guarantees that the roadway surrounding rocks have good structure stability andgood fire prevention and extinguishing ability.

Description

technical field [0001] The invention relates to a roadway grouting system and a fire prevention and extinguishing method thereof, in particular to a grouting system for easily broken roadway surrounding rock and a fire prevention and extinguishing method thereof. Background technique [0002] my country's coal resource reserves are abundant, as the main energy used in our country, it occupies an important position in the energy structure system. Due to a large amount of mining, the shallow coal seam has been completely mined. In order to ensure the supply of coal, it can only be mined deep. With the increase of mining depth, the stress level of the surrounding rock of the roadway increases continuously, and at the same time, the deep "three highs and one disturbance" environment has an increasing impact on the stability of the surrounding rock of the roadway, resulting in the occurrence of the extremely fragile situation of the surrounding rock of the roadway. The current r...

AI Technical Summary

Problems solved by technology

Using grouting technology, its coverage area is small, it cannot be piled up, and it is easy to form a "dripping" phenomenon after grouting; using gel technology, the gel will release toxic and harmful gases after being heated to seal the cracks in the surrounding rock; using nitrogen injection technology, The diffusion speed of nitrogen gas is fast, and it cannot form a good long-term fire extinguishing and cooling effect; finally, the expansion cement technology is used. Due to the high consistency of the expansion cement, it is easy to block the grouting pipe. In addition, it cannot achieve the required plugging for small gaps due to the high consistency. Effect

Therefore, at present, there is no one in the industry that can not only seal the cracks in the extremely fragile roadway surrounding rock, but also reinforce the roadway surrounding rock, and finally ensure that the roadway surrounding rock has better structural stability and fire-fighting capabilities

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