Gas drainage drill hole arrangement method for large-section tunnel passing through small-included-angle coal seam
A technology for coal seam gas drainage and drilling holes, which is applied in the fields of gas discharge, safety device, earth-moving drilling, etc., can solve the problems of low coal seam gas drainage efficiency, etc., so as to improve the gas drainage efficiency, save time, and reduce difficulty. Effect
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[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Please refer to the attached figure 2 , This embodiment provides a method for arranging boreholes for gas drainage of large-section tunnels passing through coal seams with small angles.
[0027] A large-section tunnel through a small angle coal seam gas drainage drilling arrangement method, including:
[0028] Open the main hole 1 of the tunnel;
[0029] Set up a flat guide tunnel 2 on the side of the main tunnel face 11 farther away from...
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