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Yielding anchor rod and supporting method

A technology of letting and pressing bolts and bolts, used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve problems such as failure of the anchor head, inability to effectively absorb the impact energy of impact ground pressure, and rod body breaking, etc. Let the pressure effect

Active Publication Date: 2022-01-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material of the rod body and tray of the existing mine bolts has a small ultimate stretch and poor ductility, which leads to serious situations such as failure of the anchor head and breakage of the rod body under the impact energy generated by rock bumps. , cannot adapt to the large deformation impact of the surrounding rock
A variety of high-strength, energy-absorbing anchor trays have been developed at home and abroad to address the energy-absorbing and efficiency-enhancing problems of existing anchor trays, but they still cannot effectively absorb the impact energy generated by impact rock pressure in engineering applications.

Method used

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  • Yielding anchor rod and supporting method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Bolt support has the characteristics of economy, effectiveness and high efficiency, and is the preferred active support method for surrounding rock in coal mines. The bearing capacity of the traditional bolt is limited, and the elongation of the bolt body is low and the toughness is poor. Under the impact energy generated by the impact rock pressure, the surrounding rock deforms and acts on the bolt, so that the bolt is elongated, and the elongated Anchor bolts are often unable to resist the remaining impact energy due to reduced strength, resulting in damage to the pallet or loosening of the pre-tightening nut, resulting in safety accidents, and cannot adapt to the large deformation of the surrounding rock mass in deep roadways due to high stress.

[0025] In order to ensure the co-deformation of the bolt and the surrounding rock, absorb the impact energy generated by the impact rock pressure, control the deformation of the surrounding rock, and prevent safety accidents...

Embodiment 2

[0050] see Figure 4 As shown, the embodiment of the present invention provides a support method, which is characterized in that the yielding anchor described in any one of the first embodiment is adopted, comprising the steps of:

[0051] S01. Insert the anchor rod into the preset anchor rod hole, install a tray, a pressure relief device and a pre-tightening nut at the end of the anchor rod, and complete the pre-tightening support of the anchor rod.

[0052] Specifically, the anchor rod hole is drilled at the anchor rod installation position by a drilling rig, and then the anchoring agent is placed at the end of the anchor rod hole, and then the anchor rod is inserted into the preset anchor rod hole, and the resin anchoring agent is sent to Preset anchorage in the anchor hole. Then connect the end of the anchor rod outside the anchor rod hole to the driving device, and the driving device drives the anchor rod to rotate to stir the anchoring agent. Wherein, the anchoring age...

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Abstract

The embodiment of the invention discloses a yielding anchor rod and a supporting method, and relates to the field of mine supporting. The yielding anchor rod is invented for enhancing the yielding effect of the yielding anchor rod to a certain extent. The yielding anchor rod comprises an anchor rod body, a tray, a yielding device and a pre-tightening nut are arranged at the end of the anchor rod body in a penetrating mode, and the yielding device is located between the tray and the pre-tightening nut, wherein the pressure yielding device comprises a first pressure yielding structure, a second pressure yielding structure and a spring, the first pressure yielding structure is provided with a first hollow cavity, the second pressure yielding structure is provided with a second hollow cavity, and when the first pressure yielding structure and the second pressure yielding structure are fixedly connected into a whole, the first hollow cavity and the second hollow cavity form a containing cavity, and the spring is located in the containing cavity. The method is suitable for a scene of supporting an underground structure which may have rock burst.

Description

technical field [0001] The invention relates to the technical field of mine support. In particular, it relates to a yielding anchor rod and a supporting method. Background technique [0002] With the large demand for energy in economic development, deep energy mining has become the norm. Under the action of deep high stress, coal rock mass is prone to rock burst and large deformation in the process of deep mining. However, the material of the rod body and tray of the existing mine bolts has a small ultimate stretch and poor ductility, which leads to serious situations such as failure of the anchor head and breakage of the rod body under the impact energy generated by rock bumps. , cannot adapt to the large deformation impact of the surrounding rock. A variety of high-strength, energy-absorbing anchor trays have been developed to address the energy-absorbing and efficiency-enhancing problems of the existing anchor trays at home and abroad, but they still cannot effectively...

Claims

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Application Information

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IPC IPC(8): E21D20/02E21D21/00
CPCE21D21/0026E21D21/008E21D21/0086E21D21/0093E21D20/025
Inventor 郭东明赵志峰张毅张伟叶贵川
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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