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A gas control method for soft and outburst coal seams in large mining and long working faces in underground coal mines

A technology for protruding coal seams and working faces, applied in the direction of gas discharge, ground mining, mining equipment, etc., can solve problems affecting the normal succession of mining working faces, large amount of gas control engineering, unfavorable mines, etc., to shorten the time of gas drainage, Reduced economic burden and small accident damage

Active Publication Date: 2022-02-15
PINGDINGSHAN TIANAN COAL MINING +2
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the gas control project of the long working face in the prior art is huge, the cost is high, and the cycle is long, and the balance of "pumping, mining and excavation" of the mine is not used and the problem of affecting the normal replacement of the working face is solved. For the above problems, the present invention provides a gas control method for soft and protruding coal seams in large mining length working faces in underground coal mines

Method used

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  • A gas control method for soft and outburst coal seams in large mining and long working faces in underground coal mines
  • A gas control method for soft and outburst coal seams in large mining and long working faces in underground coal mines

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Embodiment 1

[0030] To this end, the first embodiment of the coal mining work surface of the coal mine well is softly protruding the coal seam gas treatment method, including the following steps:

[0031] The first step: the directional drill is drilled in the coal seam or the bottom plate rock drawing in the laneway, and the directional drill is driven by the designated trajectory by orientation drilling direction, and the coal seam top or the bottom plate is arranged to remove the coal seam;

[0032]Step 2: When the directional penetration drill hole in the first step enters the coal seam, exit the directional drilling rig in the direction of the direction of the drilling, and switch the conventional rotary drill drill pipe with hydraulic punching equipment. Inside the wearing layer, the drilling coal hole segment is applied in the coal seam in a winding method until the drilling is constructed to the design position; the directional penetration drilling is a wearing drilling hole for the co...

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Abstract

The invention provides a method for controlling gas in a soft and protruding coal seam in a large mining length working face in an underground coal mine. After the directional drilling in the first step enters the coal seam, the third step: when the drilling in the second step is in place according to the drilling trajectory, the fourth step: exit the conventional rotary drilling tool in the drilling hole, Carry out networked negative pressure drainage for the sealing holes; step 5: during the drainage process, according to the monitoring results of the regional gas drainage online monitoring and metering device described in the fourth step; step 6: according to the The metering results of the regional gas drainage on-line monitoring metering device, through the drilling method combining the directional drilling rig technology and the conventional rotary drilling technology, give full play to the respective advantages of the directional drilling rig and the conventional rotary drilling rig, and effectively avoid drilling holes during the construction of the conventional rotary drilling rig It is easy to string holes, and the drill pipe is difficult to enter the coal seam due to the influence of its own weight.

Description

Technical field [0001] The present invention relates to the field of highlighted coal seam gas treatment under the coal mine, and in particular, there is a coal mine underground long working surface and striking method. Background technique [0002] Gas governance in a single coal seam retracted working surface under the coal mine, generally passed through the coal seam of Gas to the work face coal seam gas gassation. The pre-saving layer gas borehole includes two categories of the coal seam inlay borehole and the wearing drilled hole construction from gas extractive alley. Due to the problem of the drilling trajectory and the end hole position, the drilling trajectory is unclear, and the drilling is not deep, and the drilling is not smashed, and it is easy to leave the blank belt, so some local coal The Supervision Bureau provides to prohibit the pre-saving seam gas in the coal seam in the coal seam as regional anti-proof measures. [0003] like figure 1 As shown, wearing a laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F7/00
CPCE21C41/18E21F7/00
Inventor 张建国吕有厂陶云奇张廷伟李喜员张鹏伟焦继红寇建新符辉仝艳军高建成孙景阁
Owner PINGDINGSHAN TIANAN COAL MINING
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