None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening
A freezing method and non-full-depth technology, which is applied in sinking, shaft equipment, earthwork drilling and mining, etc., can solve the problems of long construction period, affecting mine production time, and high engineering cost, so as to reduce water damage, save water gushing treatment costs, Guarantee the effect of safe construction
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Embodiment 1
[0058] image 3 , Figure 4 As shown in Fig. 1, a method of excavating a vertical shaft through extremely thick water-rich bedrock without full deep freezing. Go through the topsoil and water-rich bedrock in turn, and go deep into the aquifer 10~20m. The main freezing pipes are arranged in a ring with the center of the wellbore as the center, 2m away from the outer wall of the wellbore; The frozen pipes are arranged in a ring with the center of the wellbore as the center, 1m away from the outer wall of the wellbore. The mine shaft is composed of a main shaft and an auxiliary shaft. Among them, the depth of the main shaft is 418.2m, and the net diameter of the shaft is φ7.5m; φ8.5m, the above non-full-depth shaft freezing method is carried out according to the following steps:
[0059] (1) Freezing method
[0060] According to the construction requirement that the comprehensive speed of excavation and laying of the shaft shall not be less than 65 meters per month, in order t...
Embodiment 2
[0106] Figure 5 , Image 6 As shown, the depth of the auxiliary shaft is 403.3m, the net diameter of the wellbore is φ8.5m, the depth of the freezing holes in the auxiliary shaft is 250m, the number of freezing holes is 36 holes, and the number of anti-slab holes is 16 holes; between the centerlines of two adjacent freezing holes The distance between the centerlines of two adjacent anti-slab freezing holes is 2478mm; the radius Υ between the centerline of the auxiliary wellbore and the inner diameter of the wellbore is 4250mm; the centerline of the auxiliary wellbore and the inner diameter of the wellbore The radius Υ between the outer diameters of the well wall is 5350㎜; the radius Υ between the centerline of the auxiliary wellbore and the centerline of the anti-slab freezing hole is 6350㎜; the radius between the centerline of the auxiliary wellbore and the centerline of the main well freezing hole The radius Υ is 7350mm; the distance between the centerline of the auxiliary...
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