Deep well coal uncovering method under strong outburst coal seam complicated geological condition

A technology for complex geological conditions and coal seams, applied in underground mining, surface mining, earthwork drilling, etc., can solve problems such as difficulty in excavating coal in coal seam groups, and achieve the effect of significant drainage effect, high drainage concentration, and improved safety.

Active Publication Date: 2020-07-03
HUAINAN MINING IND GRP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: how to solve the difficult problem of unraveling coal in coal seam groups under complex geological conditions of strong outburst coal seam

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  • Deep well coal uncovering method under strong outburst coal seam complicated geological condition
  • Deep well coal uncovering method under strong outburst coal seam complicated geological condition
  • Deep well coal uncovering method under strong outburst coal seam complicated geological condition

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Embodiment Construction

[0057] 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.

[0058] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "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.

[0059] This embodiment discloses a method for uncovering coal in deep wells under complex geological conditions in strong outburst coal seams, including the following steps:

[0060] participate figure 1 and figure 2 , S1.1 added geological prospecting; during the construction period of -73...

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Abstract

The invention discloses a deep well coal uncovering method under the strong outburst coal seam complicated geological condition. The deep well coal uncovering method includes the following steps thatS1.1, geological advanced exploration is additionally set; during underground connection roadway construction, multiple geological advanced exploration drilled holes are constructed, the trend of thefault is proved, and the possibility of avoiding the complicated coal seam and penetrating through the fault plane is analyzed; S1.2, gas pressure and gas content are measured; by constructing two sets of pressure measurement holes in an underground connection roadway and combining electronic automatic pressure measurement with mechanical pressure measurement, the gas content of the coal seam is measured; S1.3, an underground connection inclined roadway is horizontally moved, and the roadway dip angle is adjusted; S1.4, the roadway construction structure is changed, and the roadway is cut through in advance; and the roadway construction sequence is changed, a shaft bottom first-line connection roadway and a main transformer station at the same depth are constructed in advance and made to communicate with the underground connection inclined roadway in advance, and a full negative pressure ventilation system roadway is formed. By means of the deep well coal uncovering method, repeated coal uncovering is avoided, the coal uncovering safety risk is lowered, and the construction period is shortened; and the number of the drilled holes is decreased, and the hole drilling burden is reduced.

Description

technical field [0001] The invention relates to the technical field of uncovering coal in deep wells of underground coal seams, in particular to a method for uncovering coal in deep wells under complex geological conditions of strongly outburst coal seams. Background technique [0002] The deep air inlet shaft of a mine and the connecting inclined roadway of -730~-960m are in the affected area of ​​F47, ∠30~58°, H=15~20m to uncover the coal seam group of group B, and the coal seam elevation is -830m~-915m, 8 coal Gas pressure 3.1MPa, gas content 7.6m 3 / t, 4-1 coal gas pressure 3.1MPa, gas content 9.2m 3 / t, which belongs to coal seam group exposing coal under complex geological conditions of strong outburst coal seam in deep well. [0003] -730~-960m connecting inclined roadway with 279° azimuth and 22° downhill construction, successively expose 8 coal, 7-2 coal, 7-1 coal, 6-1 coal, 5-2 coal, 4-2 coal, 4- 1 After the coal is connected with the deep air inlet shaft; the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 陈建董瑞刚董善保程邦楷陈勇赵勇陈梅勇朱传记李涛李军舰
Owner HUAINAN MINING IND GRP
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