Ground drilling coal extraction auxiliary outburst elimination method for deep well high-gas-pressure coal uncovering area
A gas pressure and ground drilling technology, which is applied in gas discharge, directional drilling, wellbore/well components, etc., can solve problems such as strong blowholes, and achieve the effect of improving construction progress, improving drainage effect, and improving drainage effect.
Inactive Publication Date: 2021-06-04
HUAINAN MINING IND GRP
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is: how to solve the problem that the phenomenon of strong spray holes occurs repeatedly during the construction process of the pre-detection pressure drilling and the regional measure hole
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[0031] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention will be further described in conjunction with the accompanying drawings.
[0032] The terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.
[0033] This embodiment discloses an auxiliary outburst elimination method for surface drilling and coal removal in a deep well with high gas pressure and coal mining area, including the following steps:
[0034] Such as figure 1 As shown, S1, at -730 ~ -960m contact inclined roadway (lower...
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The invention discloses a ground drilling coal extraction auxiliary outburst elimination method for a deep well high-gas-pressure coal uncovering area. The method comprises the following steps that S1, an one-opening multi-bottom directional well construction process is constructed, specifically, coal extraction drilling is performed on the ground of the deep well high-gas-pressure coal uncovering area, one opening is a main well section, and the multi-bottom directional well comprises six branch well sections; S2, gas extraction is conducted, specifically, the six branch well sections are connected with a ground negative pressure system, and coal seam gas is extracted to the maximum extent; S3, after gas extraction is finished, cement hole sealing is conducted on the six branch well sections, and then cement hole sealing is conducted on the main well section; and S4, underground verification is conducted, specifically, seven verification holes are formed in the peripheries of the six branch well sections, and the maximum gas content is measured. After the method of one-opening multi-bottom directional well and six branch well sections is adopted, the drilling construction progress is accelerated, the extraction effect is improved, the drilling and extraction time is shortened, and therefore safe, rapid and efficient coal uncovering in the deep well high-gas-pressure coal uncovering area is achieved.
Description
technical field [0001] The invention relates to the technical field of deep well coal mining in underground coal seams, in particular to an auxiliary outburst elimination method for surface drilling and coal mining in deep well high gas pressure coal mining areas. Background technique [0002] Most coal mines consist of multiple horizontal coal seams, which need to be mined using group mining techniques. Specifically, in engineering, a vertical shaft is generally excavated earlier, and then each coal seam of the multi-horizontal coal seam is "exposed coal" one by one, and then the roadway is set up to carry out the mining of the coal seam. The so-called "uncovering coal" refers to the process of exposing the coal seam originally covered under the rock formation during the shaft excavation process. [0003] When the vertical shaft is dug down to a certain depth (especially when it exceeds 1,000 meters), the coal seam to be "exposed" generally has the characteristics of high ...
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IPC IPC(8): E21F7/00E21F17/00E21F17/18E21B7/04E21B43/00
CPCE21B7/04E21B43/006E21F7/00E21F17/00E21F17/18
Inventor 董瑞刚程邦楷陈勇董善保赵勇陈梅勇朱传记李军舰
Owner HUAINAN MINING IND GRP