A method for monitoring the stress distribution of the full-length anchor bolt body

Abstract

The invention discloses a method for monitoring the stress distribution of a full-lengthanchoring anchor rodbody, and belongs to the technical field ofanchorrodmeasurement. The method comprises the following steps thatstep 1, according to relationship between the displacement of the surrounding of a roadway and the deep displacement of rock mass, the equivalent radius of the roadway, the distancefrom the center of the roadway to a point in the rock mass and the deformation of the surrounding rock surface are obtained, and the surrounding rock stability coefficient is determined according to the surface deformation of the surrounding rock; relevant parameters of the anchor rod body, including rod length, elastic modulus, cross-sectional area areselected; relevant parameters of an anchoringagent, including anchoring agent elastic modulus and anchoring agent cross-sectional area areselected; the anchoringsupporting force isobtainedthrough a stress sensor; andstep 2, the axial force andshear stress subjected by the anchor rod body are constructed in a computer, an analysis formula is calculated, the parameter values obtained in the step 1 are input into the analytical formula to obtain the shear stress and axial force distribution law of the anchor rod body. A stress distribution curve of the anchor rod body obtained by the method reflects the continuity of the stress of the anchor rod body.

Description

technical field [0001] The invention belongs to the technical field of bolt measurement, and in particular relates to a method for monitoring the stress distribution of a full-length anchor bolt body. Background technique [0002] The full-length anchor bolt prevents the deformation of the surrounding rock through the bonding force or friction between the anchor bolt and the rock cement. At present, full-length anchor bolts have been widely used in the field of mining engineering technology, and a large number of engineering practices have also promoted the development of anchor technology. With the increase of coal mining depth, roadway surrounding rock joints and fissures are developed, soft and broken, and the damage range is large. The bearing capacity of the full-length anchor bolt needs to be continuously enhanced. Therefore, it is urgent to obtain the actual stress distribution of the full-length anchor bolt body. Support performance of long anchor bolts. [0003] I...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the existing technology only monitors the force condition at the measuring point on the anchor rod body, but cannot obtain the force condition at each position in the length direction of the anchor rod body, the present invention provides a method for monitoring the full-length anchor rod body The method for stress distribution, the present invention obtains the shear stress of the anchor rod body and the distribution law of the axial force through an analytical formula, that is, the stress distribution curve of the anchor rod body, so as to obtain the stress situation at each position in the length direction of the anchor rod body, Reflect the continuity of the force of the anchor rod body

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