Panel gas treatment method based on treelike oriented long drilled holes gradually increased step by step in zones

A step-by-step, long-drilling technology, applied in gas discharge, earthwork drilling, safety devices, etc., can solve the problems of plane and profile drainage blind areas, low drilling utilization rate, unbalanced drainage, etc., to improve Governance efficiency, the effect of non-blind area extraction

Active Publication Date: 2020-01-14
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0006] The purpose of the present invention is to provide a panel gas control method based on step-by-step incremental tree-shaped directional long drilling, which can solve the problem of low efficiency of panel gas control and easy existence of planes existing in the current coal mine underground using progressive gas control mode And section drainage blind area, unbalanced drainage, low utilization rate of boreholes, easy clogging and other insufficient technical problems

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  • Panel gas treatment method based on treelike oriented long drilled holes gradually increased step by step in zones
  • Panel gas treatment method based on treelike oriented long drilled holes gradually increased step by step in zones
  • Panel gas treatment method based on treelike oriented long drilled holes gradually increased step by step in zones

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Embodiment Construction

[0043] see figure 1 and 2 , shows the panel gas control method based on the partition step by step tree-like directional long drilling of the present invention.

[0044] The panel gas control method based on step-by-step incremental tree-like directional long drilling includes the following working steps:

[0045] Step 1: Set up the panel area and the mining face. Specifically, the width of the panel area 1 can be determined in the direction perpendicular to the direction of the coal seam according to the mine boundary; The strike direction determines the length of the panel 1; a plurality of mining working faces 3 are arranged in the panel 1 parallel to the strike direction of the coal seam.

[0046] Step 2: Carry out the excavation of the main roadway of the panel and the layout of the drilling site. The main tunnel 4 of the panel 1 is excavated at the edge of the panel 1 along the width direction of the panel 1 , and a plurality of drilling sites 5 are arranged at interval...

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Abstract

The invention discloses a panel gas treatment method based on treelike oriented long drilled holes gradually increased step by step in zones. The treelike oriented long drilled holes are arranged in the length direction of a panel, and the whole panel is covered by using main holes; planar branch holes are arranged by adopting a partition step-by-step gradual increasing mode and used for coveringplanar extracting blind areas caused by the drilling trajectory control precision, and the drilled holes are encrypted; section extracting blind areas caused by parting layers are covered by upper-layer branch holes and lower-layer branch holes; and the method not only can perform the overall ahead pre-extraction treatment on gas in the panel, but also can perform extraction treatment on extractedpressure relief gas during coal seam recovery, so that such difficulties as low progressive extraction efficiency, easy generation of extraction blind areas by the drilling trajectory control precision and the parting layers and unbalanced extraction due to arrangement of the drilled holes at equal intervals, the no-blind-area overall balanced extraction of the panel is realized, the coal mine gas treatment efficiency and effect are improved, and the safe and efficiency mining is guaranteed.

Description

technical field [0001] The invention relates to the technical field of coal mine gas control, in particular to a panel gas control method based on step-by-step incremental tree-shaped directional long drilling. Background technique [0002] Gas accidents are the disaster type with the largest number of occurrences and the greatest harm in coal mines. In order to avoid gas accidents, it is necessary to pre-drain the coal seam gas in advance to reduce it to the allowable range; it is also necessary to carry out mining and pumping of the pressure relief gas during the coal seam recovery process of the working face, so as to ensure the production of the coal mine. Safety. [0003] At present, coal mines mainly adopt a progressive gas control mode. For details, see the Chinese patent application number 201010252165.X and publication number CN101915118A. Long boreholes are constructed in the groove in advance to the next adjacent working face, and the length of the drill holes r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 李泉新董书宁石智军方俊许超刘桂芹王鲜姜磊
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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