A high-pressure water-air jet fine water mist dust reduction and gas control device at the fully-mechanized mining coal outlet

Abstract

The invention provides a fully mechanized coal caving outlet high-pressure hydrosphere jet water mist dust suppression and gas control device. Each hydraulic support is additionally provided with a coal caving linkage valve, a self-suction hydrosphere jet water mist assembly is additionally arranged on a back link of each support, an outlet of each self-suction hydrosphere jet water mist assembly points to a coal caving mechanism, the coal caving linkage valve and a self-suction hydrosphere jet water mist generator on each support are combined, coal caving control plate valves and coal caving control cylinders are connected through pipelines, the coal caving linkage valves on the two adjacent supports are connected, and the coal caving linkage valves are all connected with a main water inlet pipeline. Accordingly, on one hand, the opportunity of capturing dust through water mist is increased, the time of capturing the dust through the water mist is prolonged, dust blocking, collision and agglutination are achieved, and the dust suppression effect is improved; on the other hand, the self-suction hydrosphere jet water mist assemblies suck main airflow air of a working surface to the coal caving side, local airflow of the guide goaf side is formed, high-concentration gas at a coal caving outlet is transported from inside to outside gradually, timely diffusion of the gas at the coal caving outlet is promoted, the coal caving outlet air pressure is increased, and gas effusion is blocked.

Description

Technical field [0001] The invention relates to the field of coal mine dust prevention, in particular to a device for reducing dust and controlling gas at a fully mechanized coal caving mouth. Background technique [0002] Gas and dust are one of the main disasters in coal production. In the process of coal production, almost all operations may generate dust, especially the high-yield and efficient fully mechanized fully mechanized caving face, which makes the air in the underground operation site The dust concentration reaches a very high level. The main sources of dust in the production of fully mechanized caving face are: coal cutting process of the shearer, the process of moving the frame, and the coal falling in the caving mouth. Among them, the dust output during the coal cutting process of the shearer accounts for 6.0%, and the coal falling The amount of dust produced in coal is 48%, and the amount of dust produced during the transfer process accounts for 42%. Since full...

AI Technical Summary

Problems solved by technology

From the point of view of the use effect, it is generally unsatisfactory. The working faces of all mines use low-pressure spraying, the water supply pressure is seriously insufficient, the flow rate is too small, coupled with poor management and use, and workers' awareness of dust prevention is weak. Reluctance to operate the spray switch, making the coal outlet useless despite having a spray device

Therefore, the high-concentration dust in the coal outlet of most fully mechanized caving faces has not been effectively controlled, and it is imperative to effectively control the dust and gas at the coal outlet of the fully mechanized caving support

Images