A device and method for automatically measuring the external friction angle of solids

Abstract

The invention relates to a device and method for automatically measuring the external friction angle of a body, which includes an inclinometer, a lifting device, a monitoring device and a control system. The inclinometer includes a rotating trough, a vertical guide rail, a horizontal guide rail and a slide block; the rotating trough includes a front end and a rear end that are respectively connected to a slide block; the front end slide block is slidingly connected to the vertical guide rail, and the rear end slide block is connected to the horizontal guide rail. The guide rail is rotationally connected; the lifting device is connected to the slider at the front end and drives it to reciprocate vertically on the vertical guide rail. The monitoring device is used to measure the state of the loose body on the rotating groove. The lifting device and the measuring device are respectively connected with the control system data. Connection, the device provided by the invention for automatically measuring the friction angle outside the body has a stable stress state of the body, and the movement posture has little impact on the state of the body. High precision, fast response, accurate data, using parallel data monitoring, high data reliability. Realizing automatic measurement standardizes experiments and greatly reduces the impact of human factors on measurement results.

Description

technical field [0001] The invention relates to the mining field of underground metal mines, in particular to a device for automatically measuring the external friction angle of bulk. [0002] The invention also provides a method for automatically measuring the external friction angle of the solid body. Background technique [0003] In the mining process of underground metal mines, in order to make the loose body of caving ore slide freely along the airfoil of the ore opening, the inclination angle of the airfoil must be greater than the external friction angle of the loose body of ore. The external friction angle of ore and rock bulk refers to the angle between the inclined plane or chute and the horizontal plane at the moment when the bulk changes from a static state to a moving state (starts to slide) along the slope or chute. Therefore, it is of great significance to accurately measure the external friction angle of ore-rock bulk under different conditions to improve th...

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Problems solved by technology

[0004] Some existing experimental equipment includes a rotating trough. One end of the rotating trough is connected to the frame through a rotating shaft, and the other end can rotate around the rotating shaft. The bulk is lifted by the thrust of the rotating trough, but its movement is unstable, and the error caused by inertia is large.

[0005] At present, in the existing measurement experiments, all are manual lifting, naked eye identification, manual recording, etc. During the experiment, the labor intensity is relatively high, the experimental procedures are cumbersome, and the measured external friction angle is greatly affected by human factors. To a certain extent, the accuracy of the experiment is reduced, which is not conducive to the scientific research on the external friction angle of ore rocks

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