Concentrated Strip Gas Drainage Method for Thousand-meter Drilling Rig
A 1,000-meter drilling rig, strip-type technology, applied in the direction of gas discharge, earthwork drilling, safety devices, etc., can solve the problems of long gas drainage technology cycle, poor drainage effect, etc., achieve good drainage effect and reduce the possibility of High precision and high effect
Active Publication Date: 2016-03-02
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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Problems solved by technology
[0006] In order to solve the problems of long period and poor drainage effect in the existing gas drainage technology, the present invention provides a concentrated strip-type gas drainage method for a thousand-meter drilling rig
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Embodiment Construction
[0019] The present invention will be further described below in conjunction with the accompanying drawings.
[0020] In March 2011, gas drainage was carried out in Sihe Mine of Shanxi Jinmei Group. figure 1 Designed for the drilling of a thousand-meter drilling rig, the design and construction footage is 9,600 meters; figure 2 Designed for ordinary drilling rigs, the design and construction footage is 24,600 meters; image 3 It is the actual construction drawing of the thousand-meter drilling rig, and the actual construction footage is 11,388 meters.
[0021] During construction, use a thousand-meter drilling rig to drill holes. For the first drilling hole, branches are opened every 70-90 meters for top and bottom exploration. When drilling, the spacing in the drilling holes is kept at 3-5 meters. The distance between areas with good coal body is 3 meters, and the distance between areas with bad coal body is 5 meters. After the drilling is completed, the opening of the dril...
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The invention discloses a concentrated stripe type gas pumping and discharging method for a kilometer drill machine, and relates to a coal-mine gas pumping and discharging method, aiming at solving the problem that the existing gas pumping and discharging technology is long in period and bad in a pumping and discharging effect. The concentrated stripe type gas pumping and discharging method for the kilometer drill machine comprises the following steps of drilling by the kilometer drill machine, and exploring the top and the bottom of a firstly-constructed drill hole in a branching way every 70-90 meters; during drilling, keeping the distance of 3-5m within the drill hole; and after drilling, tightly sealing the opening of the drill hole, and carrying out gas pumping and discharging by high negative pressure. The method is good in the pumping and discharging effect, so that the possibility that gas is powered off in advance can be greatly reduced; the situation that the short drill hole constructing and the tunneling are influenced with each other can be solved; and the drilling construction is high in precision and safety.
Description
technical field [0001] The invention relates to a gas drainage method in a coal mine, in particular to a centralized strip type gas drainage method for a thousand-meter drilling rig. Background technique [0002] Due to the high gas content in the coal body of the mine, the roadway excavation is seriously restricted by gas, resulting in a tense connection between the roadway excavation and the mining of the working face. [0003] The traditional coal mine gas drainage is carried out by drilling fan-shaped drainage channels, which not only takes a long time, restricts the efficiency of coal mining, but also has a poor drainage effect in some places. [0004] The more advanced ones use the kilometer drilling design as a modular progressive drainage mode. The drilling distance is longer and the drainage coverage is wider, which makes the required drainage time relatively long, generally more than half a year; however, half a year After the roadway excavation, the gas content i...
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IPC IPC(8): E21F7/00
Inventor赵卫旗翟慧兵赵彬冯强靳伟郭青芦伟
OwnerSHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD