A method for measuring anchorage performance

Abstract

The invention discloses a method for measuring a property of an anchoring. The method comprises the following steps of carrying out anchoring on an anchor rod at a surrounding rock, fixedly arranging a force applying device on the anchor rod, enabling a detecting device to arrange on one side of the force applying device, wherein the detecting device comprises a first rod body, a first displacement sensor and a second displacement sensor, the vertical axis of first rod body is parallel to that of the anchor rod, one end of the first displacement sensor is fixedly connected to the first rod body, the other end of the first displacement sensor is connected to the anchor rod, one end of a second sensor is fixedly connected to the first rod body, and the other end of the second sensor is connected to an anchor rod supporting plate; gradually applying pulling force on the anchor rod through the force applying device, and detecting and recording the size of the pulling force applied by the force applying device through a pressure sensor; and detecting and recording the displacement generated by the force applying device through being relative to the first rod body under a gradually applying pulling force action by using the first displacement sensor, and detecting and recording the pressing displacement of the anchor rod supporting plate through being relative to the first rod body to the surrounding rock by using the second displacement sensor. The method provided by the invention has the advantages that the operation is simple, the accuracy is high, and the automation degree is high.

Description

technical field [0001] The invention belongs to the technical field of bolt support for rock masses such as coal mines, metal mines or tunnels, and particularly relates to a method for measuring anchor performance. Background technique [0002] Prestressed bolts have been widely used in underground engineering in many fields such as water conservancy, mining, transportation, and construction. The purpose of the bolt pullout test is to determine the anchorability of the surrounding rock of the roadway, and to evaluate the performance of the bolt, resin, and surrounding rock anchoring system and the anchoring force of the bolt. The anchorability test of surrounding rock is the basic work for roadway bolt support design, and it is also the basis for judging whether bolt support can be used for soft rock roadway or high gas coal seam roadway for gas drainage, especially for high prestress strength The bolt support system is the key to the success of the anchor support of the su...

AI Technical Summary

Problems solved by technology

At present, in bolt support engineering, there is no simple and easy anchoring performance testing device. Usually, the pulling force of the anchor is measured, or the detection data is read manually to calculate the anchoring performance.

The technical specification for bolt support in coal roadway stipulates that the pull-out test is mainly carried out by loading the bolt evenly and step by step until the bolt slides or the rod body is damaged. It is loaded by one person and recorded by one person. Only the sliding or breaking of the bolt can be measured. Pulling force, the indentation amount of the supporting plate and other surface protection structures of the anchor rod in the surrounding rock cannot be obtained, nor can the drawing force and the displacement curve between the anchor rod be obtained at each mechanical stage

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