Stochastic nondestructive power detecting technology for detecting anchor rod pressure state

Abstract

The invention is a random no-wear power detection technology about the stress state of anchor arm and there is installing a exciting force fasten instrument on the open end of the anchor fastened on the rock mass (coal) anchor arm anchor wire and on the open end of the anchor arm anchor wire installs an acceleration transducer connecting with the intelligent dynamic measurement equipment and make the anchor arm generated a lateral vibration by forcing to the exciting force fasten instrument and adopts the acceleration signal by the acceleration transducer and then transfer to the intelligent dynamic measurement equipment and the intelligent dynamic measurement equipment transfers the acceleration signal into the digital signal and stores it at last inputs the adopted data to the computer for computing and treating so it completes the detection of the inherent stress at the time of completed the initial installment and the detection of load at the sated of work and the monitor of forcing whole process, non-breakage, exhaustive, it can make no-wear power detection for random one anchor arm and the operation is easy and the use is convenience and speed and it is easy to carry and the effect is good and it has the extensive practicability.

Description

technical field [0001] The invention relates to a random non-destructive dynamic detection technology of the stressed state of the anchor rod, and is especially suitable for online monitoring of the use state of mines, tunnels, slope prestressed anchor rods and anchor cables, and is also suitable for mines, tunnels, slope anchor rods, anchor rods, etc. Online monitoring of search usage status. Background technique [0002] Bolt support is widely used in the reinforcement and support of underground roadways and slope surrounding rocks, especially in coal mines, where the total annual footage of roadways in state-owned coal mines in my country is more than 10 million meters. The amount of bolts used for support is as high as 40 million or more. No one can answer how many of these 40 million bolts have played a role in reinforcing the underground roadway and the surrounding rock of the slope. In fact, the tensile stress borne by different bolts or very close bolts will be diffe...

AI Technical Summary

Problems solved by technology

The steel string meter and hydraulic pillow dynamometer are installed between the surrounding rock and the supporting plate to measure the force, and the force condition of the bolt is measured according to the frequency of the steel string meter or the pressure of the hydraulic pillow after the bolt is stressed. It is also impossible to monitor the force of any anchor rod

The force-measuring bolt and pullout gauge can only be used for point detection, but not for surface detection. The pullout gauge uses a hydraulic jack to perform a pull-out test to determine the anchoring force of the bolt (maximum bearing capacity) ability), it is impossible to detect the stress state of the bolt, and this detection method is labor-intensive and time-consuming. reinforcement of the rock, and limited to individual spot checks

Images