Method for controlling laneway floor heave through deep-hole section blasting
A roadway and deep hole technology, which is applied in blasting, tunneling, earthwork drilling, etc., can solve problems such as deterioration, insufficient depth, mechanical properties of the roadway floor and unobvious improvement of the stress environment, etc., to maintain stability and reduce the amount of bottom sag Effect
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[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0023] In this embodiment, a working face with a coal seam thickness of 3 m is taken as an example to introduce the treatment method for roadway undercut.
[0024] Such as figure 1 As shown, firstly, in the underground mining area, roadways such as inlet air entry 1, incision 6 and return air entry 7 are excavated in the underground mining area; Lay diamond-shaped metal mesh 4 on the top plate and the two sides of the return air alley 7, and the lap length between the nets is 100mm; the roof and the two sides after the netting are installed with an anchor rod 5 with a length of 2.5m, and the anchor rod The row spacing between 5 is 600mm×800mm.
[0025] After completing ...
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