A new type of high-strength bolt support equipment for coal mines
A bolt support and high-strength technology, which is used in mining equipment, bolt installation, earthwork drilling, etc., can solve problems such as affecting the support capacity, bolt breakage, and easy loosening, so as to ensure the anchoring effect and guarantee The effect of supporting capacity and improving connection performance
Active Publication Date: 2021-06-08
HENAN POLYTECHNIC UNIV
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Problems solved by technology
[0002] At present, the bolt support equipment for coal mines on the market generally has a single structure. Generally, an anchor rod similar to a steel bar is used to extend into the anchor hole for anchoring. This method has insufficient protective support performance. After anchoring, the anchor rod and the rock formation There is no good connection force, and the two are fastened only by the expansion of the grouting. This method can easily cause the anchor rod and the grouting fluid to fall off or crack, and it is easy to loosen, and it is impossible to realize the axial direction of the anchor rod. Effective anchoring in the radial and radial directions affects the support capacity. After encountering excessive stress and displacement in the rock formation, because the anchor rod and the rock formation are not an integral structure, it is easy to cause problems such as fracture of the anchor rod and affect the support capacity. , greatly reducing the support effect of the anchor rod
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[0028] see Figure 1-9 , in an embodiment of the present invention, a new type of high-strength bolt support equipment for coal mines includes a support bolt mechanism, grouting equipment and a support anchor mesh 2 that are matched with the support bolt mechanism, wherein the The outer end of the support anchor mechanism is fixedly connected to the support anchor net, and the support anchor mechanism extends into the anchor borehole, and the grouting equipment can inject anchoring agent slurry into the anchor borehole ; characterized in that,
[0029] The support anchor mechanism includes an outer anchor rod 14, an inner anchor sleeve 3 and an outer plugging and fixing assembly, wherein the inner anchor sleeve 3 extends into the innermost part of the anchor borehole, and the outer anchor rod 14 The inner end of the inner anchoring sleeve 3 can be sleeved; the outer end of the outer anchoring rod 14 is provided with the outer blocking and fixing assembly located at the outer ...
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The invention relates to the technical field of bolt support in coal mines, and discloses a novel high-strength bolt support equipment for coal mines. The anchoring sleeve can be well connected with the inner wall of the borehole by using its radially extending reinforcement structure, and the inner anchoring sleeve is a circumferential expansion structure, which is not only easy to extend into the borehole, but also can be specially fixed by the grouting equipment of the present invention. Grouting, to ensure the integrated performance of the inner anchor sleeve and the inner wall of the anchor hole, can make the reinforced structure extend into the rock formation of the anchor hole. The bonding force with the wall of the anchoring borehole ensures the anchoring effect; in addition, for the fragile part of the joint between the inner anchor sleeve and the outer anchor rod, the present invention can effectively improve the joint strength of the joint by setting a plurality of radial fins. Excellent connection performance to ensure support capacity.
Description
technical field [0001] The invention relates to the technical field of bolt support in coal mines, in particular to a novel high-strength bolt support equipment for coal mines. Background technique [0002] At present, the bolt support equipment for coal mines on the market generally has a single structure. Generally, an anchor rod similar to a steel bar is used to extend into the anchor hole for anchoring. This method has insufficient protective support performance. After anchoring, the anchor rod and the rock formation There is no good connection force, and the two are fastened only by the expansion of the grouting. This method can easily cause the anchor rod and the grouting fluid to fall off or crack, and it is easy to loosen, and it is impossible to realize the axial direction of the anchor rod. Effective anchoring in the radial and radial directions affects the support capacity. After encountering excessive stress and displacement in the rock formation, because the anc...
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IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/0026
Inventor 谭毅郭文兵宋常胜神文龙苏发强王春白二虎杨达明冯占杰赵高博马志宝
Owner HENAN POLYTECHNIC UNIV