Type Ⅲ resistance-increasing deformation anchor cable for deep yielding support and its assembly and working method
A working method and anchor cable technology, which is applied in the direction of earth drilling, installation of bolts, mining equipment, etc., can solve the problems of prolonging the service life of the support structure, instability, etc., and achieve extensive practical value and economic value, low cost, good adaptability
Active Publication Date: 2021-11-09
新汶矿业集团有限责任公司华丰煤矿 +1
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Problems solved by technology
The resistance-increasing deformation anchor cable can effectively solve the problem of instability, discontinuity and nonlinear large deformation of deep support surrounding rock, which is conducive to the coordinated stability of the roadway, alleviates the damage of key positions caused by uneven load of surrounding rock, and prolongs the service life of the support structure. Guarantee the long-term stability of the support structure under the action of strong rheology and disturbance load, suitable for deep support and deep mining support
Method used
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[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0040] The front and rear in the embodiment are based on the drilling direction of the borehole.
[0041] Such as figure 1 As shown, the Type III resistance-increasing deformation anchor cable of the present invention includes a tensile casing 5, a front end anchor cable 6, a tail anchor cable 4, a compression ring 5-2 and a resistance-increasing hoop, wherein:
[0042]The tensile casing 5 is arranged in the borehole, and the inner wall of the tensile casing 5 is processed with an internal thread 7; the outer wall of the tensile casing 5 is provided with four-stage resistance-increasing hoops at intervals, which are respectively one-stage resista...
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The invention discloses a Type III resistance-increasing deformed anchor cable for deep yielding support and its assembly and working method. It comprises two anchor cables, the front anchor cable and the rear anchor cable, which are arranged at intervals in a tension casing. After the outer ends are respectively exposed from both ends of the tensile casing, they are respectively anchored at the bottom of the hole and the opening; the tail of the front anchor cable is provided with a wedge-shaped extrusion anchor sliding body, and the front end of the tail anchor cable is provided with a The extruded anchor fixed body of the external thread is provided with a serrated inner wall at the position of the anchor cable at the front end of the inner wall of the tensile casing. The supporting force of the resistance-increasing deformed anchor cable of the present invention gradually increases with the elongation and deformation of the overall structure to resist higher surrounding rock loads. When the surrounding rock load accumulation exceeds the existing supporting force, the anchor cable will continue to stretch Long deformation, at the same time the support force increases again, and the deformation of the surrounding rock is always within the control deformation range during this process.
Description
technical field [0001] The invention belongs to the field of underground engineering support, and in particular relates to a resistance-increasing deformation anchor cable for deep yielding support and a construction method thereof. Background technique [0002] With the depletion of front resources, deep mining is an inevitable trend. After entering the deep part, the surrounding rock is affected by high ground pressure, strong rheology and easy disturbance, etc. The difficulty of deep roadway support, especially the roadway support of a kilometer deep well, is significantly increased. Conventional support methods cannot keep the roadway stable, and frequent repairs lead to Maintenance costs are increasing. Practice has shown that deep roadway support should not only increase the bearing capacity but also moderately give way, so as to achieve stable and economical support. The load acting on the support body will be reduced by artificially controlling the deformation of t...
Claims
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IPC IPC(8): E21D21/00E21D20/00
CPCE21D20/003E21D21/0033E21D21/0046E21D21/008E21D21/0093
Inventor 胡兆锋王涛王军张庆林漆寒冬马洪涛李鑫赵春鑫张洪伟张士强王凯郭清虎
Owner 新汶矿业集团有限责任公司华丰煤矿