Filling drill bit for drilling type coal mining machine

Abstract

The invention discloses a filling drill bit for a drilling type coal mining machine. The filling drill bit comprises five drill bits, a transmission box, a ventilation box, a conveying pipe, a ventilation pipe and a matched connecting device, wherein the five drill bits are connected in parallel onto the drilling type coal mining machine; the drill bit connected with the ventilation box comprises a drill bit, a filing pipe and a hollow gear shaft; according to the actual work condition of an underground thin coal seam, a filling device is applied to the five-drill-bit drilling type coal mining machine, the drill bit cutting tooth distribution and the spiral blade installation are similar to those of a drill bit of the original drilling type coal mining machine, and the mining operation of the drill bit is not influenced; in addition, gangues generated in the thin coal seam mining and roadway construction process are filled into a goaf of the drilling type coal mining machine, so the tight connection of the mining operation and the filling operation of the drilling type coal mining machine can be realized; the occurrence of accidents such as goaf collapse and equipment damage in the rod withdrawal process of the drilling type coal mining machine due to mining span and depth increase is avoided; the safety and the efficiency of the thin and ultra-thin coal seam mining are favorably improved; and further, economic benefits and social benefits of coal mine enterprises are improved.

Description

technical field [0001] The invention relates to a drill bit, in particular to a drilling type coal mining machine filling drill bit suitable for backfilling of thin and extremely thin coal seams. Background technique [0002] The backfill mining method is a rock control method in the goaf, which fills the goaf with fillers and reduces roof sinking and caving with the support of the fillers. The filling methods currently used in production in China include dumping machine dumping filling, scraper conveyor unloading filling, pneumatic dumping filling, paste-like self-flowing filling and gangue pumping filling. However, the above filling equipment cannot be used in goafs with thin and extremely thin coal seams due to problems such as excessive volume and heavy equipment. Contents of the invention [0003] Technical problem: The object of the present invention is to solve the problems existing in the prior art, and to provide a filling drill bit for drilling shearer with simp...

AI Technical Summary

Problems solved by technology

However, the above filling equipment cannot be used in goafs with thin and extremely thin coal seams due to problems such as excessive volume and heavy equipment.

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