Down coal face goaf water dredging structure and dredging method thereof

Abstract

The invention relates to a down coal face goaf water dredging structure. The structure includes a fish scale net covering a collapsed top plate, after top plate gangue collapses, a goaf is no longer filled freely, and the fish scale net is used for covering to achieve the effects of protecting the top plate and catching the gangue; a nog shaped like a Chinese character 'Jing' is erected below the collapsed top plate and used for supporting the collapsed top plate; a water-retaining wall is built at the lower side of the nog shaped like a Chinese character 'Jing', and the goaf and the water-retaining wall are used for building a weir to form a water sump. The structure further includes a water discharge pipe, the water-retaining wall is provided with at least one water discharge pipe to connect space outside the water-retaining wall and the water sump. The invention further provides a down coal face goaf water dredging method. The down coal face goaf water dredging structure has the advantages that water dredging is conducted from a source, water and coal are separated, water blasting of a tunnel is avoided, and the production security hidden danger is eliminated; the discharged water is few in impurity, damage to a drainage system is reduced, and the electric charge is saved; the dredging project is reduced, manpower is reduced, and the work efficiency is improved; the operating environment is purified, and the production efficiency and the quality standardization level are improved.

Description

technical field [0001] The invention relates to a coal mine old empty water drainage structure and a coal mine old empty water treatment method, in particular to an overhead mining working face old empty water drainage structure and a dredging method. Background technique [0002] Coal mine water damage is one of the five natural disasters that plague coal mine safety production, and its degree of harm is second only to gas outburst and explosion. Once a water damage accident occurs in a mine, it may at least submerge the working face, damage electromechanical equipment and facilities, affect the physical and mental health of employees, and reduce production efficiency. However, it is more difficult to control the old empty water in the mine water disaster, especially during the production of the down mining face, the old empty water flows along the groove to the lower part due to its own gravity, and a large amount of old empty water can wash away the roadway and supports, ...

AI Technical Summary

Problems solved by technology

Once a water damage accident occurs in a mine, it may at least submerge the working face, damage electromechanical equipment and facilities, affect the physical and mental health of employees, and reduce production efficiency, and at most it may cause mass casualties and well flooding accidents.

However, it is more difficult to control the old empty water in the mine water disaster, especially during the production of the down mining face, the old empty water flows along the groove to the lower part due to its own gravity, and a large amount of old empty water can wash away the roadway and supports, and silt the roadway. Soaking equipment, after entering the coal transportation system, it will cause coal water discharge, coal sprinkling, reduce coal quality, and cause warehouse collapse and other accidents

The previous practice was to excavate a drainage alley, which required high investment costs, or passive treatment. Only a pump was installed at the lowest point to drain out, which required timely dredging, occupied a large number of people, and hidden dangers could not be treated, leading to accidents

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