Method for filling goaf by gangue

Abstract

The invention relates to a method for using stone to fill the worked-out section under the coal well, which arranges a stone bin (10) outside the working surface to transfer the under-well stone or the ground stone to the stone bin (10) to be broken by the breaker; and using the stone belt machine (20) on the producing surface to transfer them to the upper end of producing surface (1); the producing surface (1) is supported by the filling brackets or the brackets whose back have extending beams; when the bracket is self-motion type, suspending a small belt device (16) on the extending beam and moving ahead with the bracket; when the bracket is not self-motion type, the small belt device (15) is arranged at the bottom plate under the extending beam and using slide device to move ahead; the small belt device (16) is mounted with a self-motion stone unload cart (15); transferring the small belt device (16) to the upper end of producing surface to unload the stone to the worked-out section. The invention can reduce the earth sink, effectively treat the stone, and reduce the accommodation area of stone and the pollution, with simple device and lower cost.

Description

Technical field [0001] The invention relates to a method for processing gangue in coal mines, in particular to a method suitable for directly filling the goaf of the mining face with the gangue of the excavation working face underground. Background technique [0002] Gangue is solid waste associated with coal production and processing. A large amount of gangue has been stored for a long time, occupying land, causing spontaneous combustion, and polluting the air and groundwater. The mined-out area of ​​the mining face is the largest underground space, and it is the most economical and reasonable solution to dispose of gangue in the mined-out area. Backfilling the goaf can not only realize that gangue backfilling does not go into the well, does not occupy land, reduces environmental pollution, but also reduces surface subsidence and greatly liberates coal reserves. At present, there are two filling methods: hydraulic and wind, but hydraulic filling mainly uses sand. [0003]...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of large investment, many equipments, complex technology and high cost in existing filling methods, the present invention provides a method for filling gobs with gangue. In addition to reducing ground subsidence and effectively treating In addition to the advantages of reducing the land occupation and pollution of waste rock, it also has the characteristics of simple system, less equipment, simple technology, small investment and low cost.

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