Method for preventing well wall fracture through active protection blocking ring
An active protection, well wall technology, applied in drilling equipment and methods, earthwork drilling, shaft equipment and other directions, can solve the problems of short duration of treatment effect, multiple damage of shaft shaft, and increased treatment cost, and achieve prevention and control. The effect of controlling the fracture of the shaft wall, improving the stress condition of the shaft wall and reducing the strength of passive support
Active Publication Date: 2022-08-09
CHINA UNIV OF MINING & TECH
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However, these methods have limitations. After the shaft wall rupture accident occurs, the treatment effect will be maintained for a short time or the treatment effect will not be good after the above-mentioned methods are used, and the shaft shaft will be damaged again or even repeatedly. Multiple treatments are required. The required treatment cost is greatly increased, so the present invention proposes a method for fundamentally treating shaft wall rupture, which plays an active role in protecting the shaft shaft
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[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0029] like Figure 1-Figure 4 As shown, a method for preventing and controlling well wall rupture through active protection blocking ring of the present invention comprises the following steps:
[0030]Step 1: According to the actual situation and site conditions, determine the position of the mine shaft shaft 1 that needs to implement the active protection blocking ring 2, and pre-mark the construction of the active protection blocking ring 2 around the mine shaft shaft 1, that is, in the mine The position of the top of the active protection blocking ring 2 is marked around the shaft shaft 1; the thickness of the rock and soil stratum left between the active protection blocking ring 2 and the mine shaft shaft 1 is not more than 30 meters, that is, the edge of the mine shaft shaft 1 The straight-line distance from the inside of the active prote...
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The invention discloses a method for preventing well wall fracture through an active protection blocking ring, and belongs to the technical field of underground engineering structure protection. An active protection blocking ring which is prone to generating longitudinal shear deformation and can insulate water is constructed on the surrounding stratum of the shaft of the mine shaft, and the influence of surrounding stratum settlement on the shaft can be blocked. The active protection blocking ring can prevent vertical additional force generated by settlement of the stratum on the outer side of the active protection blocking ring from acting on the well wall, the water pressure acting on the well wall is reduced, and the stress condition of the well wall is improved. The reason for the fracture disaster of the well wall is that vertical additional force which is generated by stratum settlement and acts on the outer side of the well wall can cause overlarge vertical pressure on the well wall, and the existence of the active protection blocking ring fundamentally eliminates the vertical additional force which is generated by stratum settlement on the outer side of the active protection blocking ring and acts on the outer side of the well wall. Therefore, the purpose of preventing and treating well wall fracture is achieved.
Description
technical field [0001] The invention relates to a method for preventing and controlling shaft wall rupture, which is applicable to a method for preventing and controlling shaft wall rupture through an active protection blocking ring implemented under special stratum conditions of deep topsoil layer, and belongs to the technical field of underground engineering structure protection. Background technique [0002] Since the 1980s, the shaft wall of the Lianghuai mining area, Yongxia mining area, Yanzhou mining area, Datun mining area and other mining areas in China has ruptured. So far, more than 130 shafts have been ruptured, seriously endangering the safety of mine production. The research believes that the root cause of the wellbore rupture is that due to the subsidence of the stratum around the wellbore, a vertical downward "additional force" is generated at the interface between the stratum and the outer side of the wellbore. The additional force continues to increase, ca...
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IPC IPC(8): E21D8/00E21B7/00
CPCE21D8/00E21B7/00
Inventor 任彦龙时晓菲张磊杨维好黄家会李海鹏王衍森
Owner CHINA UNIV OF MINING & TECH