Drilling robot for coal protective layer mining

Abstract

The invention discloses a drilling robot for mining a coal protective layer. The drilling robot is characterized in that during working, a crawler travelling mechanism reaches a preset position, and a supporting column is controlled to enable the robot to reach a stable state; an installing column moves on a guide rail seat, a rotary moving mechanism moves on the installing column and rotates by itself, and two hole drilling and hole-expanding mechanisms are aligned to coal rock needing to be drilled; a plunger water pump and the drilling and hole-expanding mechanisms are started, low-pressure water formed by a plunger water pump is ejected from a high-pressure nozzle through a sealing swivel joint and a flow channel, a thrust oil cylinder I is controlled to enable a multifunctional drill bit to form a coal rock drill hole under the assistance of the low-pressure water and drill in a coal seam reaches the set depth; and finally, the low-pressure water is changed into the high-pressure water, a multifunctional drill rod drives the multifunctional drill bit to retract, a high-pressure water jet flow rotates to impact and crush the coal seam for hole expanding to form pulverized coal slurry, the pulverized coal slurry flows into a material collecting vehicle on a working face for retreatment, and then coal seam hydraulic hole expanding is completed. According to the drilling robot, hydraulic driving is adopted, the structure is compact, moving is flexible, the water jet coal rock smashing technology is combined, and coal protective layer mining can be achieved.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a drilling robot for mining a coal protective layer, which is suitable for equipment for mining an underground protective layer in a coal mine, and provides guarantee for safe mining of a gas outburst coal seam. Background technique [0002] At present, the regional measures adopted to prevent and control coal and gas outburst in my country mainly fall into two categories: mining protection layer and pre-pumping coal seam gas. Exploitation of protection layer is the most effective and economical regional measure to prevent outburst. According to the "Coal Mine Safety Regulations", the protection layer must be mined in the prominent dangerous area that has the conditions for mining the protection layer. When exploiting the protective layer, the gas in the protected layer and the adjacent layer should be extracted at the same time. However, the protective layer often has poor...

AI Technical Summary

Problems solved by technology

In order to solve the problems of small influence range of borehole drainage radius and poor drainage effect in low-permeability and medium-hard coal seams, the invention incorporates hydraulic reaming technology

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