Centralized Strip Drainage Method for Thousand-meter Drilling Rig
A kilometer drilling rig, strip technology, applied in gas discharge, earthwork drilling, mining equipment, etc., can solve problems such as poor gas drainage efficiency, achieve early drainage, reduce coal body tile content, and advance drainage The effect of reducing the content of coal body tiles
Active Publication Date: 2018-12-11
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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Problems solved by technology
like figure 1 As shown, in the current general strip drainage method of a thousand-meter drilling rig, 17 boreholes are constructed in the working face, and the construction length of all the boreholes is 400 meters, and the distance between the drill holes is 3-5 meters. However, the gas after construction Poor pumping efficiency
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[0011] A kind of centralized strip-type pumping method for a thousand-meter drilling rig, such as figure 2 As shown, using the kilometer drilling rig, 17 drilling holes are arranged in the working face, such as image 3 As shown, the 5-13# boreholes are arranged in the areas at both ends of Yingtou and Hengchuan, of which two (5#, 6#) are constructed at the left end of Yingtou 2, and two (7#, 8#) are constructed at the left end of Hengchuan 3 #), two constructions (9#, 10#) at the head-on 4 on the right side, and three constructions (11#, 12#, 13#) at the right side of Hengchuan 3; m, 1#-4# will be constructed at drilling site 1 on the left side of Hengchuan, and 14#-17# will be constructed at drilling site 5 on the right side of Hengchuan, such as Figure 4 As shown, the distance between the final holes of the drilled hole is 5 meters, the length of the drilled hole is not less than 720 meters, and the azimuth angle of the drilled hole: 1#-70°, 2#-75°, 3#-80°, 4#-85° , 5#-...
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The invention relates to a coal mine underground gas processing method, in particular to a kilometer rig concentrated stripe type drainage method. The method solves the problem of overranging drainage of a working face. A kilometer rig is used at the working face; 17 drill holes are formed in the working face, wherein 5# to 13# drill holes are used for construction in regions at two ends of mine heads and short roadways; two left mine heads are constructed; two short roadways at the left side end are constructed; two right mine heads are constructed; three short roadways at the right side end are constructed; 1# to 4# drill holes are constructed at a left side drill site; and 14# to 18# drill holes are constructed at a right site drill site. Compared with the prior art, the kilometer rig concentrated stripe type drainage method has the advantages that by adopting the scheme, the concentrated stripe type drainage mode is improved; the distance of eight drill holes of the kilometer drill sites at the two sides is lengthened to 720m; the construction length of coal pillars and mine head drill holes are 400m short holes; after the construction completion, high-negative-pressure and high-concentration concentrated mode drainage is formed; the gas content of coal bodies in a 400m range in front of a crossheading roadway can be lowered to a value no greater than 8m<3> / t in a short time; the roadway construction is enabled not to be restricted by the gas; and the smooth roadway construction can be realized.
Description
technical field [0001] The invention relates to an underground gas treatment method in a coal mine, in particular to a centralized strip drainage method for a thousand-meter drilling rig. Background technique [0002] Since the Sihe Mine, which belongs to the Shanxi Coal Group, is a high-gas mine, but the production connection is extremely tight, the gas content measurement of the underground excavation face often exceeds the standard. In order to solve this problem, the centralized strip drainage of the thousand-meter drilling rig was born, which is to use the thousand-meter drilling rig to construct short-distance, long-distance, strip-type drilling. During the construction process, no branches or fewer branches are opened. Concentrated drainage of these boreholes with high negative pressure forms a high negative pressure and high concentration centralized mode of drainage, which reduces the gas content of the coal body within 400 meters in front of the tunnel roadway to l...
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IPC IPC(8): E21F7/00
Inventor 孙新华冯强郭青
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD