Automatic tamper type waste filling hydraulic support

Abstract

The invention discloses an automatic tamper type waste filling hydraulic support which comprises a base and a top beam, wherein the base and the top beam are connected by uprights, the front end of the top beam is provided with a forepole, the rear end of the top beam is provided with a scraper conveyor and further connected with an internally-telescopic extrusion scraping plate by a retractable jack which is arranged horizontally; the rear side of the base is provided with the extrusion scraping plate by a first and a second extrusion jacks, and the first extrusion jack is horizontally arranged. The automatic tamper type waste filling hydraulic support solves the problems that conventional cut and fill hydraulic support equipment can not ensure top filling of filler and has poor tamper intensity; in addition, the automatic tamper type waste filling hydraulic support realizes the high-strength supporting for a gob roof by virtue of waste fillers, effectively eliminates the defect of ground subsidence, realizes safe recovery for part of permanent coal pillars, corner coals and coal under buildings on the premise of not destroying factories and relocating villages, and improves the recovery of the coal resources. The invention is also suitable for various solid fillers such as coal ash, river sand, loess and the like.

Description

technical field [0001] The invention relates to the field of support equipment for underground fully-mechanized mining working faces in coal mines, in particular to a gangue-filling hydraulic support for directly filling underground gangue into goafs of fully-mechanized mining working faces and compacting the gangue. Background technique [0002] The coal industry is a major industry that discharges pollutants and consumes energy, and has been listed as a key industry for energy conservation and emission reduction by the state. The implementation of gangue filling and mining can backfill all the gangue generated in the coal mine production process into the goaf, reduce the cost of gangue discharge, solve the problem of land occupation and treatment of gangue hills on the ground, and eliminate the pollution source of gangue hills that spontaneously combust and release harmful gases to pollute the atmospheric environment . At the same time, it can minimize land subsidence, pr...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent ZL200510043629.5 "Hydraulic support for filling gangue" proposes a hydraulic support for filling gangue. The chute of the scraper conveyor is suspended under the tail beam of the hydraulic support. The gangue is transported in the goaf area, relying on the natural accumulation of gangue to fill the goaf, but due to the limitation of the mechanical structure of the filling gangue hydraulic support in the height direction, there is a large gap between the goaf roof and the filling body, and the gangue filling The body cannot touch the roof, and the loose coefficient of the gangue filling body is large, the filling effect is not ideal, and the ground will still have a large subsidence

Since the filler falls from the blanking hole of the conveyor chute and accumulates naturally, there is a large gap between the goaf roof and the filling body. When using the shovel of the filling mining hydraulic support for tamping, the shovel must be used first. Push the filler to the gap in the direction of the roof above the gob obliquely. When the filler is pushed to the upper slope, the filler will touch the roof and be compacted. Return to the original position in the opposite direction, the filler will fall back under its own gravity, a gap will appear between the top plate and the filler, and the effect of compaction will disappear

When the filling in the middle is tamped, under the action of the shovel, due to the gap at the top of the goaf, the filling arches upwards, but as the shovel retracts, the filling falls back under its own gravity , the effect of tamping is not obvious, only the filling at the bottom of the goaf can achieve a certain tamping effect

Therefore, the hydraulic support for filling mining does not solve the technical problems of the patent ZL200510043629.5. The looseness coefficient of the filling body in the goaf and at the top is still relatively large, and there is still a certain gap between the goaf roof and the filling body. The filling effect is still unsatisfactory, and the ground will still have a large subsidence

[0006] Since the currently designed and developed hydraulic supports for filling mining have the above-mentioned problems that cannot guarantee the roof connection and poor compaction strength, this limits the application of filling mining technology in "three-down" mining, and a large number of "three-down" pressure Coal cannot be mined, resulting in a serious waste of resources

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