Directional drilling method for cross-border mined-out area

A goaf and area technology, applied in the field of advanced detection, can solve the problems of high construction frequency, large number of holes, and high cost, and achieve the effect of reducing the number of holes, improving construction efficiency, and reducing costs.

Inactive Publication Date: 2018-07-10
CHINA SHENHUA ENERGY CO LTD +1
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Problems solved by technology

[0004] The head of roadway excavation is 200m away from the boundary of the minefield or the goaf. In order to ensure that the detection side distance reaches 20m, the horizontal distance between the final hole of a single hole is not greater than 3m. 14 holes need to be constructed each time, and the depth of a single hole is 70m. , the allowable excavation distance is 40m, and a total of 70 boreholes nee

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  • Directional drilling method for cross-border mined-out area
  • Directional drilling method for cross-border mined-out area

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[0037] The specific embodiments of the present invention will be further described below in conjunction with the drawings.

[0038] It is easy to understand that, according to the technical solution of the present invention, there are multiple structural modes and implementation modes that can be replaced by one of ordinary skill in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solutions of the present invention, and should not be regarded as all of the present invention or as a limitation or limitation to the technical solutions of the present invention.

[0039] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc., mentioned or may be mentioned in this specification are defined relative to the structure shown in the drawings, and they are The concept of relative, therefore, may change accordingly accordin...

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Abstract

The invention discloses a directional drilling method for a cross-border mined-out area. The directional drilling method for the cross-border mined-out area comprises the following steps that S101, data of a mine drilling area and the cross-border mined-out area are collected; S102, a drilling scheme is determined according to the collected data; S103, drilling operation is carried out between thecross-border mined-out area and the mine drilling area according to the drilling scheme to form an arc-shaped drilling track, and the drilling track circles the cross-border mined-out area. Accordingto the directional drilling method for the cross-border mined-out area, the cross-border mined-out area is circled by the arc-shaped drilling track, the number of drill holes is reduced, the construction efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of advanced detection, in particular to a directional drilling method aiming at cross-boundary mined-out areas. Background technique [0002] There are abandoned goafs and small coal kilns in the shallow part of many mining areas in my country. Old empty water is formed after these abandoned goafs and small coal kilns accumulate water. The geometric shape of these old empty water is irregular, and the water volume can reach Millions of cubic meters, once the mining face is close to or exposed, it often causes water inrush and flooding and personal casualties, which poses a great threat to the safety of coal mine production. [0003] There are 11 local small coal mines around the mine of Halagou Coal Mine, most of which have cross-border mining, which poses a major threat to the safety of mine roadway excavation. When excavating close to the boundary of the mine field, in order to prevent accidents in the goaf crossing...

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Application Information

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IPC IPC(8): E21B7/04E21B49/00
CPCE21B7/04E21B49/00
Inventor 王庆雄魏光荣宋立兵张志杰张光辉蔚保宁胡建平张彦磊
Owner CHINA SHENHUA ENERGY CO LTD
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