None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening

A freezing method and bedrock technology, used in well drilling, shaft equipment, earthwork drilling, etc., can solve the problems of long construction period, high engineering cost, affecting the mine production time, etc., to reduce water hazards, ensure safe construction, and save money. The effect of water inrush treatment costs

Inactive Publication Date: 2013-09-04
陕西彬长矿业集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the full deep freezing method has defects such as long construction perio

Method used

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  • None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening
  • None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening
  • None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening

Examples

Experimental program
Comparison scheme
Effect test

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 , Figure 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 auxiliar...

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Abstract

The invention discloses a none-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening. According to the method, a shaft penetrates through surface soil, the water-rich bed rock, a water-resisting layer and low-permeability bed rock sequentially from top to bottom, and main freezing pipes penetrate through the surface soil and the water-rich bed rock sequentially from top to bottom, penetrate into the water-resisting layer by 10m-20m and stop in a low-permeability rock stratum; a none-full-depth freezing depth is 240m-260m and a wall-caving-preventing freezing depth is 40m-45m; the main freezing pipes are annularly arranged with the circle center of the shaft as a circle center and the distance between the main freezing pipes and the outer wall of the shaft is 2m; wall-caving-preventing freezing pipes penetrate into the surface soil only by 43m and are annularly arranged with the circle center of the shaft as a circle center, and the distance between the wall-caving-preventing freezing pipes and the outer wall of the shaft is 1m. The method is fast in construction, safe and efficient and capable of preventing water damage caused when underground water damages a horsehead and related chamber rock mass along annular water diversion channels during construction of the horsehead after a full-depth freezing shaft is frozen, wherein the annular water diversion channels are formed by the freezing pipes and temperature measuring pipes; therefore, cost for treating water burst is saved, and safety construction of the horsehead and a chamber is guaranteed.

Description

technical field [0001] The invention relates to a vertical shaft digging and freezing construction method, in particular to a non-full-depth freezing method for shaft digging through extremely thick water-rich bedrock. Background technique [0002] Many mine constructions in recent years have been carried out in areas with complex geological conditions. Most of these mines need to pass through 400-700m (a few nearly 1000m) deep soil or rock layers. Under such circumstances, mine construction will face underground high-stress rocks and For extremely harsh engineering environmental conditions such as long-term over-consolidated soil, more complex hydrogeological conditions, gas and high temperature, it will be very difficult or even impossible to use conventional sinking methods. When encountering water-rich rock formations, the conventional drilling method is adopted. Due to the large amount of water inflow, the quality of grouting is not good, and the water inflow after grou...

Claims

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Application Information

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IPC IPC(8): E21D1/12
Inventor 王蓬马忙利任建喜谢冬季张琨冯晓光刘沛林奚家米韩拴祥刘朝科冯喜存陈海安
Owner 陕西彬长矿业集团有限公司
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