Coordinated-deformation energy-absorption anchor rod suitable for mining high-stress large-deformation rock mass

A large-deformation, high-stress technology, applied in mining equipment, installation of anchor rods, earthwork drilling and mining, etc., can solve the problems of rock mass fracture and damage, failure to meet support strength, etc., achieve large deformation capacity, and easy large-scale batch processing , the effect of simple structure

Inactive Publication Date: 2010-12-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, although ductile anchors such as pipe-slotted anchors can provide large deformation, they cannot meet the supp

Method used

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  • Coordinated-deformation energy-absorption anchor rod suitable for mining high-stress large-deformation rock mass
  • Coordinated-deformation energy-absorption anchor rod suitable for mining high-stress large-deformation rock mass
  • Coordinated-deformation energy-absorption anchor rod suitable for mining high-stress large-deformation rock mass

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Example Embodiment

[0014] The present invention will be further described below with reference to the drawings and specific embodiments.

[0015] See figure 1 with figure 2 , One end of the wave-type energy-absorbing section curved rod body 2 is provided with an elongated anchoring section straight rod body 1, the length of the elongated anchoring section straight rod body 1 is 500-800mm, and the material is 22mm outer diameter rebar. The wave-type energy-absorbing section curved rod body 2 The other end is provided with a threaded section 5, a fastening nut 4 is screwed on the threaded section 5, and a tray 3 is sleeved on the threaded section 5 between the fastening nut 4 and the curved rod body 2 of the wave-like energy-absorbing section, and the anchor is extended The end of the straight rod body 1 away from the curved rod body 2 of the wave-like energy-absorbing section is provided with a stirring wing 6. The wave-type energy-absorbing section of the curved rod body 2 can be deformed synchro...

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Abstract

The invention discloses a coordinated-deformation energy-absorption anchor rod suitable for mining a high-stress large-deformation rock mass. The rod body of the anchor rod mainly comprises an elongated anchoring section straight rod body (1) and an energy-absorption section bending rod body (2), wherein one end, close to the energy-absorption section bending rod body, of the rod body is provided with a threaded section (5); a fastening nut (4) is screwed on the threaded section (5); and a steel pallet (3) is sleeved between the fastening nut (4) on the threaded section (5) and the energy-absorption section bending rod body. The anchor rod is mainly characterized in that: a wavelike bending energy-absorption section in a specific length and a specific shape is mechanized on a long straight threaded steel rod body in a heat treatment mode; the energy-adsorption section restrictively allows a wall rock to deform properly and simultaneously absorb the deformation energy of the rock mass until reaching total allowable deformation quantity meeting a design requirement. In the process, the supporting force of the anchor rod is increased gradually; and finally, after the bending section is completely straightened and a yielding effect controlled by a high-stress roadway ground pressure is achieved, the anchor rod becomes a high-strength rigid resin anchor rod for providing greater supporting force for a supported wall rock mass.

Description

technical field [0001] The invention relates to a mining bolt, in particular to a mining coordinated deformation energy-absorbing bolt suitable for high-stress and large-deformation rock mass, belonging to the technical field of ground pressure control and roadway support in underground mines. Background technique [0002] Bolt support technology has a history of more than 100 years, and has become a relatively new type of support technology commonly used in underground engineering construction. Bolt support has many advantages: it can significantly improve the roadway support effect, increase safety, save steel, reduce support costs, reduce labor intensity, improve the underground operating environment, and low maintenance costs, easy construction, etc. At present, rigid bolts (such as threaded steel bolts) are often used in shallow underground hard rock mines, and anchored with mortar or resin. This kind of bolt has high rigidity and high support strength, but has little d...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 李夕兵马春德姚金蕊赵国彦王斌
Owner CENT SOUTH UNIV
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