Tubular base plate and anchor rod assembly using same
A tubular and backing plate technology, which is used in the installation of bolts, mining equipment, earth-moving drilling, etc., can solve the problems of deformation of bolts, weak axial pressure yielding ability, weak radial support ability of rock holes, etc. Radial support strength, strong axial prestress, and the effect of improving radial support capacity
Pending Publication Date: 2022-08-05
洛阳工岩科技有限公司
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Problems solved by technology
Due to the plate-like structure of the backing plate, its own structural strength is high, so its axial yielding capacity is weak, and it does not have the radial support capacity for rock holes, which is easy to cause tension in areas with large deformation of rock and soil or high ground stress. Under the action, the anchor rod is deformed or even broken, making the rigid support and anchoring effect invalid
In addition, in the prior art, the structure that can generally achieve a large axial pressure relief is generally a casing structure embedded in the rock hole. This type of casing structure and the backing plate are separated, which not only leads to an increase in the number of parts, but also Moreover, the radial support ability of the casing structure to the rock hole is weak, and it cannot have strong radial and axial support capabilities to the rock hole at the same time.
Method used
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[0025] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.
[0026] Examples of tubular backing plates:
[0027] like image 3 , The tubular backing plate tube has a hollow tubular structure, and the entire tubular backing plate 2 is integrally formed into a metal tubular structure with high structural strength. The rear end of the tubular backing plate expands in diameter and forms a stop section 21 that is matched with the rock hole entrance. The radially inwardly shrinks to form a closing section 22, the tubular backing plate between the blocking section and the closing section is the radial support section 23, the outer diameter of the radial support section is larger than the inner diameter of the rock hole 4, and the radial support section The guard section is forcibly installed inside the rock hole, so that the radial support section of the tubular backing plate...
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The invention relates to a tubular base plate and an anchor rod assembly using the tubular base plate, the tubular base plate is of a hollow tubular structure, the rear end of the tubular base plate expands outwards and forms a stop section matched with a rock hole inlet in a stop mode, and the outer wall of the stop section is provided with an inclined face matched with the inner wall of the rock hole inlet; the front end of the tubular base plate shrinks inwards in the radial direction to form a closing-in section, the portion, between the blocking section and the closing-in section, of the tubular base plate is a radial supporting section, the outer diameter of the radial supporting section is larger than the inner diameter of the rock hole, and the radial supporting section is forcibly installed in the rock hole, so that the radial supporting section of the tubular base plate plays a radial supporting role in the rock hole. A spring slot is formed in the tubular base plate and extends in the front-back direction, one end of the spring slot is located on the stopping section, and the other end of the spring slot is located at the joint of the radial supporting section and the closing-in section. The designed tubular base plate not only plays a role of an existing base plate, but also can be matched with a female core and an anchor rod to achieve the effects of axial yielding and / or radial supporting and the like.
Description
technical field [0001] The invention belongs to the technical field of geotechnical support, in particular to a tubular backing plate and an anchor rod assembly using the tubular backing plate. Background technique [0002] During construction in the surrounding rock area, it is necessary to use bolt assemblies to support the surrounding rock. In the prior art, a backing plate is generally used to match the bolt; during installation, the bolt is inserted into the corresponding rock hole, and then the backing plate is sleeved on the end of the bolt close to the entrance of the rock hole, and then a locking member such as a nut is used to connect with the bolt. The bolts are threaded to press the top of the backing plate against the outer surface of the surrounding rock at the entrance area of the rock hole. Due to the plate-like structure of the backing plate, its structural strength is high, so its axial pressure yielding ability is weak, and it does not have the radial s...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21D21/00
CPCE21D21/0086E21D21/0093E21D21/00E21D21/0026
Inventor李战敏
Owner洛阳工岩科技有限公司