Large vertical depth solid feeding system and large vertical depth solid feeding process for filling extracted coal

Abstract

The invention relates to a large vertical depth solid feeding system and a large vertical depth solid feeding process for filling extracted coal. The system comprises a ground control console, a feeding pipeline and a well-type storage bin, wherein the upper part of the storage bin is provided with an underground observation chamber which is communicated with a crossheading and also provided with a conical buffer for reducing the impact force; the bottom of the conical buffer is provided with a signal sensor for monitoring the bulk height of monitored materials; the lower part of the well-type storage bin has the shape of a semi-oblique cone; a well wall cleaning device is arranged on the well-type storage bin; and the bottom of the well-type storage bin is provided with a bottom bin feeder which is communicated with a material conveying roadway. Solid filling materials with different compositions are continuously fed into a main channel from a branch pipe through the ground control console, mixed materials are subjected to pressure reduction through the conical buffer on the upper part of the well-type storage bin first, enter the well-type storage bin with the shape of the semi-oblique cone, slide off and are stacked, and feeding is stopped by the ground control console after the bin is full. The invention has the advantages of simple structure, convenient and fast process, convenient implementation, time and labor conservation, and high efficiency and safety.

Description

technical field [0001] The invention relates to a large vertical depth solid feeding system and process for filling coal mining, in particular to a solid feeding system and process for sending ground solid filling materials to the goaf of an underground coal mining face for filling. Background technique [0002] With the continuous mining of coal resources, the state has issued a series of policies to urge enterprises to change the past "predatory" mining methods, forcing enterprises to increase resource recovery rate and utilization rate of associated resources. The "three-down" coal mining has always been an issue worthy of attention. According to incomplete statistics, at present, the "three-down" coal pressing in the production mines of the unified coal mines in my country has reached 13.79 billion tons, of which 9.468 billion tons have been built, accounting for the total 69% of coal pressure. At the same time, coal mines emit a large amount of solid waste gangue during...

AI Technical Summary

Problems solved by technology

The massive stacking of coal gangue and fly ash has seriously affected the normal production of the mining area, brought great threats and harm to the living environment of human beings, and brought a series of social and environmental problems, mainly manifested in: Occupy a large area of ​​farmland and forest land, and emit a large amount of toxic and harmful gases when spontaneously ignited, polluting the environment and endangering human safety

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