Method for determining spatial position of horizontal well for gas drainage in worked-out area
A technology of spatial location and gas drainage, which is applied in the direction of gas discharge, safety devices, mining equipment, etc., can solve problems such as unfavorable gas drainage effects, and achieve the effect of simple methods and clear steps
Inactive Publication Date: 2014-06-11
NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU
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Problems solved by technology
But at present, there are few studies on this, and many cases rely on construction experience, which is not conducive to ensuring the effect of gas drainage
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] see figure 2 , which is a flow chart of a method for determining the spatial position of a horizontal well in a goaf gas drainage provided by the present invention, which includes the following steps: the first step S21, determining the direction of the horizontal well: combining the direction of the horizontal well with The trend of the coal seam in the specific mining working face is consistent; the second step S22, the determination of the position of the horizontal well above the working face, that is, the determination of the height of the horizontal section of the horizontal well from...
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The invention discloses a method for determining spatial position of a horizontal well for gas drainage in a worked-out area, comprising the following steps: step one of enabling running directions of the horizontal well to be the same as running direction of a coal bed in a specific mining face; step two of dividing a mining area into a caving zone, a fissure zone and a bending subsidence zone from bottom to top along a vertical direction; and arranging the horizontal well in the fissure zone rather than the caving zone and the bending subsidence zone; step three of arranging the horizontal well in a gas gathering area; step four of enabling a horizontal section of the horizontal well to tilt to a coal face; and step five of determining spatial position of a straight hole section and a deflecting section of the horizontal well according to a design of spatial position of the horizontal section of the horizontal well. The method provided by the invention has the advantages as follows: spatial position of the horizontal well is determined when gas drainage is carried out in the worked-out area by taking running direction, height apart from coal face and distance of inner interlocked wind roads of the horizontal section of the horizontal well as main content, so that method is simple, and steps are clear.
Description
technical field [0001] The invention belongs to the field of mining, in particular to a method for determining the spatial position of a horizontal well in a goaf for gas drainage. Background technique [0002] Horizontal well technology has not only been widely valued and developed rapidly in oil and natural gas extraction, but also gradually extended to other fields and played an important role, such as in pipeline laying and municipal engineering. At present, horizontal well technology It has also been paid more and more attention to gas drainage and has shown application prospects. Gas drainage is of great significance to the safety of coal mine production and the utilization of methane resources; at present, gas drainage in gobs is one of the methods of gas drainage in coal mines. Applying horizontal well technology to gas drainage in gobs can realize gas drainage with roof horizontal wells; roof horizontal wells replace high-level drainage roadways or other methods of...
Claims
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IPC IPC(8): E21F7/00
Inventor 孙家应吴松贵余大有赵志根
Owner NO 1 SURVEYING TEAM OF ANHUI CHARCOAL FIELD & GEOLOGY BUREAU