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High-stress floppy protruding thick coal seam large-diameter drilling device

A drilling device, high-stress technology, applied in the direction of safety devices, drilling equipment and methods, earthwork drilling and mining, etc.

Inactive Publication Date: 2014-07-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large-diameter drilling that can be carried out in high-stress soft and protruding thick coal seams, and can solve the high-stress softness that occurs in the drilling process, such as buried drill, clamped drill, spray hole, stuck drill and drill stuck. Large-diameter drilling device for outburst thick coal seam

Method used

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  • High-stress floppy protruding thick coal seam large-diameter drilling device

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[0021] like figure 1 , figure 2 , image 3 As shown, the present invention first analyzes the characteristics of the soft coal seam, develops the double-arc groove three-edged drill pipe, and then analyzes the force of the double-arc grooved three-edged drill pipe with different diameters, and determines the double-arc grooved three-edged drill pipe with different diameters. The required torque of the rod, and then select the drill car according to the torque, and finally use the selected double-arc groove triangular drill rod and the drill car to complete the large-diameter drilling of the soft coal seam.

[0022] The high-torque new type drilling rig uses a hydraulic motor to drive the crawler and the drilling tool, and adopts a variable system, so that the no-load speed is fast, and the torque gradually increases as the speed decreases with the load change.

[0023] The large-diameter triangular drill rod is a double-arc groove triangular drill rod.

[0024] The six fac...

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Abstract

The invention discloses a high-stress floppy protruding thick coal seam large-diameter drilling device which comprises a drill carriage and a drill stem. The horizontal section of the drill stem is in a three-edge shape. Two arc grooves are formed in the side wall of the drill stem. The arc grooves go up in a spiral shape along the surface of the drill stem. The diameter of the circumcircle of the drill stem is larger than or equal to 100 mm. The drill carriage is provided with a variable driving system of the drill stem, a hydraulic motor driving crawler walking device and a drill stem automatic detaching device. According to the drilling device, during drilling construction, wind power powder discharging is used, and a powder discharging channel is formed during rotating of the arc grooves. Large-diameter drilling can be carried out in a high-stress floppy protruding thick coal seam, and the technical problems that under the condition that coal seam floppy breathability is low, extracting drilling implementation is hard, drilling depth is not enough, and the phenomena of drill burying, drill clamping, hole spraying, drill blocking and drill holding during a drilling process happen are solved.

Description

technical field [0001] The invention relates to a mine safety mining technology, in particular to a large-diameter drilling device for high-stress soft and protruding thick coal seams. Background technique [0002] Coal is an important basic industry in my country. For a long time, coal has accounted for more than 2 / 3 of my country's primary energy production and consumption, but the safety situation of coal mines is severe. More than 95% of my country's coal is mined underground. Due to the complex and changeable geological conditions of coal occurrence, the gas content in coal seams is generally high. More than 30% of the mines currently mined are high-gas mines. Since the founding of the People's Republic of China, there have been 23 accidents that killed more than 100 people at one time, of which 21 were gas (or gas and coal dust) explosion accidents, accounting for 91.3%. Gas is a kind of gas that exists in coal seams and coal-measure formations in two states of adsorp...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21F7/00
Inventor 聂百胜李祥春孟筠青
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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