An intelligent fast application method of bolt prestress

Abstract

The invention discloses an intelligent fast application method of bolt prestress. The steps are as follows: S1: through on-site actual observation of the supported roadway, determine the magnitude of the warning force of the warning force bolt; S2: install the constant resistance hydraulic pressure At the same time, the hydraulic pump injects liquid into the constant resistance hydraulic jack through the liquid injection pipeline; S3: Set the threshold value of the pressure valve of the detection pipeline, and the constant resistance hydraulic jack injects the emulsion into the detection pipeline according to the threshold value of the pressure valve, and passes the detection The flow sensor in the pipeline monitors the emulsion in the detection pipeline; S4: According to the monitoring results of the flow sensor, determine the prestress applied on the anchor rod, and compare the determined prestress applied on the anchor rod with the early warning force comparison, and at the same time determine whether the hydraulic pump continues to inject liquid into the constant resistance hydraulic jack according to the comparison result. The intelligent application method of the present invention not only has high reliability and high efficiency, but also complies with the current development trend of intelligent equipment.

Description

technical field [0001] The invention relates to the technical field of novel prestressed anchor rods, in particular to an intelligent and rapid application method for prestressed anchor rods. Background technique [0002] The roadways mined in deep mines are severely affected by dynamic pressure. In order to reduce the roadway deformation caused by the high ground stress during the excavation of the dynamic pressure roadway retaining roadway, and the interlayer displacement caused by the uneven settlement of the roof caused by the basic roof rotation, high Prestressed bolt support. The general process of the current prestressing method for anchor rods is: the operator controls the tensioning device, applies tension to the anchor rod, or applies torque to the anchor rod through a nut, and then waits for the anchoring agent to solidify or weld to form a prestressed anchor rod. The traditional method is time-consuming and inefficient because of the need to control the size of ...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In the process of reducing the deformation of the roadway caused by high ground stress during the excavation of the dynamic pressure retaining roadway, and the uneven settlement of the roof caused by the basic roof rotation, it is necessary to control the prestress and wait for anchorage The solidification of the agent and the control of the prestress size are not only time-consuming and inefficient. The present invention proposes an intelligent and rapid application method for bolt prestress

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