Self-propelled diameter-variable stress rosette pasting device used for geostress measuring

Abstract

The invention discloses a self-propelled diameter-variable stress rosette pasting device used for geostress measuring and relates to the technical field of surveying of geological and mineral energy resources and geotechnical engineering. The self-propelled diameter-variable stress rosette pasting device comprises an orientor, an automatic climbing system, a colloid storing and extruding mechanism, a stress rosette fixing and pasting mechanism and a drive-by-wire operator controlling the automatic climbing system, and the orientor, the automatic climbing system, the colloid storing and extruding mechanism and the stress rosette fixing and pasting mechanism are connected sequentially. By the self-propelled diameter-variable stress rosette pasting device, functions of mounting-in-place and pasting of strain gauges in the process of geostress testing through a hole wall stress relieving method can be realized, the problems that a strain meter is complex in mounting process and low in success rate, testing depth is limited by length of a mounting guide rod and the like when a conventional hollow inclusion method is adopted for geostress measuring are solved effectively, application range of the hole wall stress relieving method for geostress measuring is expanded, and testing efficiency is improved. The self-propelled diameter-variable stress rosette pasting device has the advantages of low testing cost, convenience in carrying, simplicity and convenience in on-site operation and the like.

Description

technical field [0001] The invention belongs to the field of physical and mechanical experiments of rock mass engineering, and in particular relates to a self-variable diameter strain rosette sticking device for ground stress measurement. Background technique [0002] In-situ stress is the fundamental force that causes deformation and destruction of mines, water conservancy and hydropower, civil construction, railways, highways, and various underground geotechnical excavation projects. Rock mass mechanical properties, surrounding rock stability analysis, geotechnical engineering excavation design and decision-making essential raw data. Especially with the continuous increase of the depth of underground engineering, the stress level increases rapidly, the stress distribution of the roadway surrounding rock and the mine pressure appear abnormal, the damage of the roadway surrounding rock becomes very severe, and the support becomes more difficult. Therefore, only by mastering...

AI Technical Summary

Problems solved by technology

In view of the fact that the traditional installation tools mostly use metal rods with a fixed diameter, they can only be pushed and slid in the hole by manpower, and there is a hollow plunger at the front end of the strain gauge. When the inside of the test hole is not smooth or partially collapsed When this happens, it is easy to cause the colloid to be extruded prematurely, so that the installation device cannot accurately send the hollow cladding strain gauge into the hole and timely extrude the colloid to complete the successful installation of the strain gauge, which greatly affects the efficiency of ground stress testing and At the same time, due to the actual conditions of installing rods and devices, the depth of the measuring hole generally does not exceed 15m, so the test can only be carried out near the roadway or in the shallow layer of the rock

On the other hand, the existing commercial hollow inclusion strain gauges are expensive, resulting in high testing costs

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