Forward-type full-automatic controllable variable-diameter pressure relief connecting rod drilling bit device and using method thereof

Abstract

The invention discloses a forward-type full-automatic controllable variable-diameter pressure relief connecting rod drilling bit device and a using method thereof, and relates to the field of large-diameter drilling for pressure relief in metal mine mining or coal mining. The forward-type full-automatic controllable variable-diameter pressure relief connecting rod drilling bit device comprises a drilling bit, a pressure relief connecting rod and a connecting rod end head, the pressure relief connecting rod comprises a pressure relief connecting rod main body, a diameter-expanding cutting head,a fixed cutter head, a supporting diameter-expanding rod, a sliding connecting wedge, a trigger piston, a spring, a sliding fixed plate and a limiter, the diameter-expanding cutting head, the fixed cutter head and the supporting diameter-expanding rod are connected with one another, and the fact that each part reciprocates in a rail under the action of water pressure/air pressure through the trigger piston is achieved, so that the expansion and retraction of the diameter-expanding cutting head are achieved. The forward-type full-automatic controllable variable-diameter pressure relief connecting rod drilling bit device effectively realizes full-automatic diameter change, controllable hole expanding diameter and whole process powder discharge in the process of drilling, and the device andthe using method thereof can meet the pressure relief effect, meanwhile, reduces the damage of pressure relief drilling to the surrounding rock at a certain depth on the roadway surface and further improves the construction efficiency.

Description

technical field [0001] The invention relates to the field of large-diameter drilling pressure relief in coal mining or metal mining, in particular to a forward-type fully automatic controllable variable-diameter pressure relief connecting rod drill device and a method of use thereof. Background technique [0002] my country is a large coal mining country. According to the statistics of the National Energy Administration, by the end of 2015, the total scale of coal mines in the country was 5.7 billion tons, and coal consumption accounted for 64.0% of the total energy consumption. With the increase of mining intensity and depth, coupled with the complexity of coalfield geological conditions, my country's coal mines are increasingly threatened by dynamic disasters such as rock bursts. In response to this problem, many scholars have made considerable progress in the current research on rock burst monitoring and early warning and comprehensive prevention and control, providing gu...

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Problems solved by technology

[0008] CN207212272U discloses a kind of reaming device, mainly adopts connecting rod to realize diameter reaming, and this device can't accurately control the diameter of the reaming hole that the bottom leaves, and the drill rod speed affects the diameter of reaming; Can't carry out the reaming of drilling process , can't discharge powder

[0009] CN108915686A discloses a drilling axis-diameter two-way pressure relief method in the impact danger zone of a coal roadway. The main method is to use expandable blades on both sides of the reaming bit end to realize reaming. Realize powder discharge during the whole drilling process, while the reaming diameter is fixed, and controllable diameter reaming cannot be realized

[0010] CN107503688A discloses a roadway pressure relief structure, manufacturing

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