A fully pneumatic mine roadway spraying system and method

Abstract

The invention discloses a fully-pneumatic mine roadway spraying system and method and belongs to the technical field of mine coal and rock roadway wall closure. The system comprises a spray head (1), a conveying pipe (2), a feeding device (5), a stock bin (6), a water supply system (8), a pressure air system I (9); the water supply system (8) is connected with a helical structure (1-2) of the spray head (1); one end of the conveying pipe (2) is communicated with a spray head body (1-1), the other end of the conveying pipe (2) is connected with the feeding device (5) and the pressure air system I (9); an air inlet of the feeding device (5) is connected with the pressure air system I (9), and a feeding port is communicated with the stock bin (6); materials are sucked by the feeding device (5) into a system pipeline, conveyed by the pressure air system I (9) to the spray head (1) and sprayed to an operation wall after being mixed with water. According to the fully-pneumatic mine roadway spraying system and method disclosed by the invention, the quantity of dust on the operation site can be reduced, so that the occurrence of occupational diseases is reduced; the system is small in occupied space, simple and convenient to operate, high in material utilization rate and good in construction stability.

Description

technical field [0001] The invention relates to a spraying system and method, in particular to an all-pneumatic mine roadway spraying system and method, belonging to the technical field of mine coal and rock roadway wall sealing. Background technique [0002] At present, the dry (tidal) spraying process is the main method of grouting for anchor nets in underground coal mine roadways, that is, the sprayed materials (cement, sand, etc.) added to the hopper are dry, and the dry materials are sent to To the nozzle, there is a water inlet pipe at the nozzle, and the dry material is mixed with water at the nozzle and then sprayed out. There are following problems in this dry (tide) formula spraying construction method: [0003] (1) Excessive dust content in the air at the site seriously damages the health of the miners: during the construction process, on the one hand, the high rebound rate makes the air at the construction site full of dust; The process adopts the rotor piston ...

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Problems solved by technology

[0003] (1) Excessive dust content in the air at the site seriously damages the health of the miners: during the construction process, on the one hand, the high rebound rate makes the air at the construction site full of dust; The process adopts the rotor piston type jet machine and high-pressure air feeding, and the air leakage during the mixing and conveying process is inevitable, causing dust to fly around the machine

[0004] (2) Serious waste of resources: in the current dry (wet) spraying process, the rebound rate of sprayed materials during the construction process is as high as 40%, which is a serious waste of resources

This wet spraying construction method has problems such as large equipment occupation space, complicated process and low spraying efficiency.

[0006] The Chinese patent application with the patent number ZL86100660.7 basically adopts the pneumatic roadway spraying process, but the system described in the patent includes a variety of large equipment, the system is relatively complicated, and requires an electric mine fan, which occupies a lot of space It is huge and inconvenient to operate (for example, it needs to be transported to the work site by car after loading is completed), and it is difficult to take away the spraying material efficiently in a large tank directly by wind flow, and the stability needs to be verified

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