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A method and device for real-time monitoring of the anchoring force of a double-tray anchor

A real-time monitoring and anchoring force technology, which is applied in mining equipment, installation of bolts, earthwork drilling and mining, etc., can solve the problems of large measurement equipment, high cost, and inconvenient use, and achieve the possibility of reducing the possibility, low cost, and small size. Effect

Active Publication Date: 2017-07-28
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for real-time monitoring of the anchoring force of double-tray anchor rods, so as to solve the problems of large, high cost and inconvenient use of the dynamometer measuring device in the prior art

Method used

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  • A method and device for real-time monitoring of the anchoring force of a double-tray anchor
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  • A method and device for real-time monitoring of the anchoring force of a double-tray anchor

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Embodiment 1

[0046] Embodiment 1: The present invention relates to an anchoring force monitoring method. Strain gauges are arranged on the connecting parts of the double-tray structure to form a Wheatstone strain bridge circuit, and the current anchoring force of each anchor bar is instantly displayed through the display instrument. When the anchoring force is insufficient or Remind the technician when the anchoring force is overloaded, effectively reducing the possibility of coal mine safety accidents;

[0047] Specific steps include:

[0048] (1) A double-tray structure is adopted for bolt support. The double-tray structure is composed of a hollow cylinder in the center between the two pallets and four centrally symmetrical solid cylinders welded on the edge.

[0049] (2) Four centrosymmetrical strain gauges are arranged axially on the upper middle of the five cylinders between the double trays to form a Wheatstone full-bridge circuit;

[0050](3) Arrange a temperature compensation shee...

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Abstract

The invention belongs to an anchoring force monitoring method and device and relates to a real-time monitoring method and device of anchoring force of double-plate anchor bolt. The method comprises: welding five short columns between two plates, including a hollow column in the middle and four centrosymmetric solid columns around, and each column is axially and centrosymmetrically provided with four strain gauges, a Wheatstone full-bridge circuit is formed, and a strain gauge arrangement direction is along the axes of the columns. A current column surface strain value is acquired by a strain bridge circuit, and a controller computes anchor bolt anchoring force according to current axial strain values of the columns and controls a display instrument and an alarm to send out corresponding indicative signals; in the device, a double-plate structure, a strain bridge, an analog digital converter, the controller, the display instrument and the alarm are connected in order. The monitoring method and device is low in cost, simple and easy to use, easy to popularize and apply, capable of monitoring anchor bolt anchoring force accurately in real time, and capable of sending a warning in case that the anchoring force is insufficient or overloaded, effectively reducing the occurrence likelihood of coal mine safety accidents.

Description

technical field [0001] The invention relates to an anchoring force monitoring method and device, in particular to a method and device for real-time monitoring of the anchoring force of double-tray anchor rods in coal mine roadways and other underground anchoring projects. Background technique [0002] Anchor bolts are widely used in mining and tunnel surrounding rock reinforcement, especially in coal mine roadway support, bolt support has become the main technical means at present. The anchoring force of the anchor is an important indicator reflecting the initiative and timeliness of the anchor support. Monitoring the anchoring force of the anchor is very important to understand the current support effect, but how to accurately and comprehensively monitor the working state of the anchor and the parameters of the anchoring force It is still a problem so far. In the coal mine roadway, when the anchoring force does not meet the support requirements, it will cause the separatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/02E21F17/18
CPCE21D21/008E21D21/02E21F17/18
Inventor 李明马超茅蓉蓉郭世儒曹丽丽郭晓倩茅献彪张雷巩百川安超彭敏
Owner CHINA UNIV OF MINING & TECH
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