Yielding adaptor of well wall in frozen well, and construction method
A technology of freezing well and shrinkage, applied in well sinking, shaft equipment, earthwork drilling, etc., can solve problems such as damage and insufficient strength of the well wall, and achieve the prevention of well wall damage, good vertical shrinkability, and high reliability. Effects of Pressure Relief Capability
Active Publication Date: 2007-02-21
HUAINAN MINING IND GRP +1
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Problems solved by technology
The existing research results show that: the main reason for the failure of these well shafts is that the bottom aquifers in these mining areas are directly covered on the coal measure strata. Melting settlement, the effective stress in the soil gradually increases, which causes the soil layer around the wellbore to consolidate and settle, and a considerable vertical additional force is applied to the wellbore. The wall fails due to insufficient strength
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[0020] see figure 1 , figure 2 , set a circular cylindrical body with a cross-section in the shape of "I", the top is the upper flange 1, the bottom is the lower flange 2, and the upper flange 1 and the lower flange 2 are used for There are at least two circles of ring-shaped vertical plates 3 carrying longitudinal force. On the outer periphery of the ring-shaped cylindrical body, an arc-shaped plate 4 bearing horizontal pressure is bridged between the upper flange 1 and the lower flange 2. An asphalt injection port 6 is provided on the inner vertical plate 5 on the inner periphery of the annular cylinder, and through asphalt injection holes 7 are provided on each ring-shaped vertical plate 3 respectively.
[0021] In specific implementation, figure 1 , image 3 As shown, the steel backing plate 8 is fixedly connected to the bottom of the lower flange 2. The outer edge of the steel backing plate 8 is tooth-shaped, and the space reserved between adjacent tooth shapes can be...
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The present invention relates to a frozen well retractability wall joint and its construction method. It is characterized by that a circular ring-shaped cylinder body whose section is made into 'H'-shaped structure is set, its top portion is upper flange, its bottom portion is lower flange, between the upper flange and lower flange at least two turns of ring-shaped vertical plate are set and used for bearing longitudinal pressure; on the periphery of said circular ring-shaped cylinder body, between the upper flange and lower flange an arc-like plate for bearing horizontal pressure is cross-connected; on the internal circumferential surface of said circular ring-shaped cylinder body an asphalt injection hole is cut on the inner layer vertical plate. On all the ring-shaped vertical plates the through asphalt injection holes are respectively cut; several the invented joints are vertically set along the well wall of said frozen well, said joints can effectively reduce the additional force vertically acted on the well wall so as to ensure wellbore safety and effectively prevent well wall from cracking.
Description
Technical field: [0001] The invention relates to a shaft wall joint of a frozen well, more specifically a coal mine vertical shaft shaft used for construction in a deep alluvial layer using a freezing method. The joints of well wall structure and the construction method of joints. Background technique: [0002] Since 1987, there have been more than 70 coal mine vertical shaft rupture accidents in Huaibei, Xuzhou, Datun, Yanzhou, Yongxia and Dongrong mining areas, mainly shaft shafts constructed by freezing method. The existing research results show that: the main reason for the failure of these well shafts is that the bottom aquifers in these mining areas are directly covered on the coal measure strata. Melting settlement, the effective stress in the soil gradually increases, which causes the soil layer around the wellbore to consolidate and settle, and a considerable vertical additional force is applied to the wellbore. The wall fails due to insufficient strength. Inven...
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IPC IPC(8): E21D5/11E21D1/12
Inventor 袁亮程桦唐永志刘树彪姚直书徐华生荣传新蔡海兵
Owner HUAINAN MINING IND GRP