Pneumatic filling system and process for open-air side coal goaf

Abstract

The invention relates to a pneumatic filling system and process for an open-air side wall coal goaf. The filling system mainly is composed of a gangue bin, a feeding vibrating screen, a feeding belt conveyor, a crawler crusher and a pneumatic filling device, and the pneumatic filling device comprises a pneumatic filling pump, a pushing hydraulic cylinder, a pneumatic filling pipe, a high-pressurepneumatic inlet, a first-section filling pipe and a feeding hopper. The filling process comprises pipe connecting operation, gangue filling operation and continuous pneumatic filling operation. The filling requirements of the goaf of a drilling and production method can be met, the mining safety of the drilling and production method is enhanced, and safety accidents such as collapse of the goaf are prevented. The device has the advantages that parallel operation is easy to achieve, the occupied space is small, material transportation and configuration of various devices are convenient, the recovery rate of coal resources is increased, and the filling cost is reduced.

Description

technical field [0001] The invention relates to a pneumatic filling system and process for open-pit side coal goafs, which are suitable for backfilling operation of side coal goafs in open-pit coal mines. Background technique [0002] Gangue is a derivative of underground coal mining. Using gangue to fill underground gobs can reduce the cost of raising gangue and underground filling. However, how to carry out filling operations in a small space is another key point for the popularization and application of drilling and mining in thin coal seams. an obstacle. There are still some problems in traditional filling methods, such as low efficiency and poor continuity of overlying rock separation layer grouting, large water consumption of sand filling will pollute groundwater, high filling cost of paste (like paste), and self-slipping of gangue Filling is prone to insufficient filling, mechanized gangue filling takes up a lot of underground space, artificial gangue filling is labo...

AI Technical Summary

Problems solved by technology

[0002] Gangue is a derivative of underground coal mining. Using gangue to fill underground gobs can reduce the cost of raising gangue and underground filling. However, how to carry out filling operations in a small space is another key point for the popularization and application of drilling and mining in thin coal seams. an obstacle

There are still some problems in traditional filling methods, such as low efficiency and poor continuity of overlying rock separation layer grouting, large water consumption of sand filling will pollute groundwater, high filling cost of paste (like paste), and self-slipping of gangue Filling is prone to insufficient filling, mechanized gangue filling takes up a lot of underground space, artificial gangue filling is laborious and labor-intensive, and has poor safety. It is difficult for filling equipment to enter the goaf, resulting in incomplete filling operations and potential safety hazards

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