Advance fully automatic controllable variable diameter pressure relief connecting rod drill device and its use method

Abstract

The invention discloses a forward-type fully automatic controllable variable-diameter pressure-relief connecting rod drill device and a use method thereof, which relate to the field of large-diameter drilling pressure-relief in coal mining or metal mining. It includes a drilling bit, a pressure relief connecting rod, and a connecting rod end. The pressure relief connecting rod includes a pressure relief connecting rod main body, an expanding cutting head, a fixed cutter head, a supporting expanding diameter rod, a sliding connection wedge, a trigger piston, a spring, Sliding fixed plate, limiter; expansion cutting head, fixed cutter head and supporting expansion rod are connected to each other, and the reciprocating movement of each part in the track under the action of water pressure / air pressure is realized by triggering the piston, and then the diameter expansion is realized Extension and retraction of the cutting head. The invention effectively realizes automatic diameter change, controllable hole expansion diameter, and powder discharge in the whole process of drilling. The damage of the surrounding rock at a certain depth on the surface can also improve 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 use method thereof. Background technique [0002] my country is a large coal mining country. According to the statistics of the National Energy Administration, as of 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 great progress in the current research on monitoring and early warning of rock burst and comprehensive prevention and control, providing guaran...

AI Technical Summary

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 diameter of drilling rod speed influences 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. This device cannot realize drill-in drilling and cannot 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 method and hole reaming device, wherein the reaming device is an oil-controlled hole reaming cutter for drilling and diameter expansion. This method requires an additional hydraulic oil control system, which increases cost and The workload, and the device cannot realize forward reaming and controllable diameter reaming. At the same time, due to the use of oil control device, the dust in the hole cannot be discharged, causing blockage and reducing construction efficiency.

It also has the defect that the dust in the hole cannot be discharged

[0012] To sum up, the test devices in the prior art have not solved the technical problems of fully automatic diameter reduction, controllable reaming diameter, and powder discharge in the whole process in the target area during the pressure relief drilling process.

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