Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool

A dual-channel, soft coal-rock technology, applied to drilling equipment and methods, drilling tools, percussion drilling, etc., can solve the problems of easy blockage, damage, and low drilling efficiency of drilling holes, and achieve the effect of heat dissipation
CN103556940AActive Publication Date: 2014-02-05HENAN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN POLYTECHNIC UNIV
Publication Date
2014-02-05

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Abstract

The invention discloses a dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and a construction method of the drilling tool. The drilling tool comprises a drilling tail rotating slag tapping device, a dual-channel porous turbulence pressure relief drilling rod and a dual-channel drilling bit, wherein the drilling tail rotating slag tapping device is connected with the dual-channel porous turbulence pressure relief drilling rod on a drilling machine, and the dual-channel drilling bit is mounted at the front end of the dual-channel porous turbulence pressure relief drilling rod. The drilling tool is mainly used for easy-to-shrink and broken soft coal rock drilling. The construction method of the drilling tool comprises the steps that the drilling machine and an air supply system are started; an air flow enters an inner channel of the dual-channel porous turbulence pressure relief drilling rod and reaches the bottom of a drilling hole; and the air flow carries drilling cuttings to reverse out along an outer channel of the dual-channel porous turbulence pressure relief drilling rod to enter a dust collector connected with the drilling tail rotating slag tapping device. The drilling tool is novel in design; deslagging is accomplished in an annular space in the drilling rod, so that influences of drilling hole shrinkage and drilling hole damage on a drilling hole deslagging space can be avoided effectively; and due to the porous characteristic of the surface of the drilling rod, stress between a rod body in a drilling hole blocking area and coal slag can be released effectively, the stacked drilling cuttings can be evacuated, and heat gathering on the surface of the drilling rod can be prevented.
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Description

technical field

[0001] The invention belongs to the technical fields of gas drainage drilling construction in outburst coal seams of coal mines and soft rock drilling construction, and in particular relates to a dual-channel porous turbulent flow pressure relief drilling tool for drilling soft coal rocks and a construction method thereof. Background technique

[0002] At present, underground gas drainage is the main technical means of mine gas control. Underground gas drainage is premised on drilling construction, which mainly includes gas drainage drilling in the coal seam and gas drainage drilling through layers. For geological conditions In complex weak coal and rock mass, during drilling construction, the hole wall shrinks and is severely damaged. In addition, gas-containing coal jet holes occur frequently, and blockages are easily formed in the borehole, resulting in loss of slag discharge space, drill sticking, and drill breakage. Frequent, resulting in shallow drillin...

Claims

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