Water-rich fault fracture zone collapsed roadway repairing method based on angle-variable umbrella-shaped advancing grouting
A technology of advanced grouting and broken zone, which is applied in the direction of tunnel, earthwork drilling, tunnel lining, etc., can solve the problems of enlarging the broken area of surrounding rock, difficult roadway maintenance, and difficulty in controlling surrounding rock, so as to ensure long-term stability, The effect of reducing blindness
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[0030] The present invention will be further described below with reference to the drawings and embodiments.
[0031] Such as figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 As shown, the present invention includes the following steps:
[0032] 1) Water exploration and water diversion are carried out in the inclined well 8-10m behind the roadway deformation zone 1. When drilling, the positions of the hanging holes between the rows are arranged in a plum blossom pattern, and the adjacent drilling rows are arranged in different ways. The grouting range between rows is complementary. All odd-numbered rows are drilled in one-ring hole mode, and all even-numbered rows are drilled in two-ring hole mode. The one-ring hole pattern is to arrange holes at intervals of the arch base line 6 and above at an angle α of 30°, the bottom angle is to arrange the holes along the arch base line 6 below the angle β of 32°, and the bottom plate is below the unilateral center line Holes are ...
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