A large deformation shear anchor and its installation method
A large deformation and bolt technology, which is used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve the problems of inability to improve the shear strength of the interface of the bolt and anchoring section, and achieve improved shear resistance and large support resistance. , to avoid the effect of continuous extension
Active Publication Date: 2018-05-08
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0006] In order to avoid the shortcomings of the prior art, the present invention provides a large deformation shear anchor and its installation method to solve the problem that the existing large deformation anchor cannot improve the shear strength of the anchor itself and the interface of the anchor section
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[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.
[0037] Such as Figure 1 to Figure 7 As shown, a large deformation shear anchor includes a rod body, an upper sleeve 2 and a lower sleeve 10. The rod body includes an upper rod body segment 1 and a lower rod body segment 11 connected to each other. The length of the upper rod body segment 1 is longer than that of the lower rod body segment 11, the rod diameter of the upper rod body section 1 is smaller than the rod diameter of the lower rod body segment 11, the upper rod body segment 1 traverses the upper sleeve 2, the lower rod body segment 11 is placed in the lower sleeve 10 and the length of the lower rod body segment 11 is less than The length of the lower sleeve 10; the upper and lower rod body sections are solid threaded steel, the upper and lower sleeves are hollow ...
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The invention discloses a large deformation shear anchor, which comprises a rod body, an upper sleeve and a lower sleeve. The rod body includes an upper rod body section and a lower rod body section. Inside the cylinder, the upper and lower sleeves are connected by steel ropes or strong springs. The upper inner side of the lower rod body section is provided with a rod body limiter for preventing the lower rod body section from jumping out of the lower sleeve. The upper inner circumference of the lower sleeve Inner concavo-convex segments are provided. The invention also discloses a method for installing a large-deformation shear anchor rod, which includes the steps of: inserting the upper rod body section together with the lower rod body section from the bottom of the lower sleeve; Wrap around the upper rod body in a state; anchor the part from the bottom of the upper rod body to the upper sleeve; install the tray and sleeve plug, and tighten the pre-tightening nut until the pre-tightening force reaches the set requirement. The bolt in the invention can extend with the deformation of the surrounding rock, can adapt to the large deformation of the surrounding rock of the roadway, and ensures the stability of the surrounding rock of the roadway.
Description
technical field [0001] The invention belongs to the technical field of underground engineering safety support, and in particular relates to a large-deformation shear-resistant anchor rod and an installation method thereof. Background technique [0002] In the field of underground engineering support, bolt support has become the most widely used support method, especially in coal mine roadway support. In recent years, with the continuous increase of mining depth, rock mass mechanical disasters are increasing, which are manifested in the increase of intensity and frequency of rock burst, large deformation of roadway surrounding rock, large deformation of unstable rheology, coal and gas outburst large deformation etc. Therefore, in this case, it is required that the anchor rod can produce a large elongation rate, and no damage will occur when the surrounding rock undergoes stable or unstable large deformation. [0003] Aiming at the low elongation rate of bolts commonly used ...
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IPC IPC(8): E21D21/00E21D20/00
CPCE21D20/00E21D21/0033
Inventor 赵同彬郭伟耀谭云亮于凤海尹延春邹建超程康康郭磊刘晓明
Owner SHANDONG UNIV OF SCI & TECH