Recyclable crustal stress measuring device

Abstract

The invention discloses a recyclable crustal stress measuring device and an application method therefor, wherein the device consists of a guide bar, a probe, a liquid pressurization apparatus, a gas pressurization apparatus, a differential pressure regulating valve and a data collection device. When the recyclable crustal stress measuring device is used, the probe is put at a designated position of a rock core drill hole a via the guide bar; the probe is pressurized respectively via the gas pressurization apparatus through a gas injection tube and via the liquid pressurization apparatus through a liquid injection tube, real cylindrical deformation is generated via a differential pressure regulating valve probe, an elastic membrane on a surface of the probe is enabled to be completely and tightly attached to a hole wall, stress of a rock core is relieved, data is transmitted to the data collection device via strain rosettes of an inner wall of the elastic membrane, crustal stress of rock mass can be obtained, the device in which the rock core is recyclable is taken out after measurement operation is completed, and reuse can be realized via replacement of the elastic membrane. The recyclable crustal stress measuring device provides accurate crustal stress data for scientific design and reasonable construction of a tunnel and mine well project support, and the recyclable crustal stress measuring device is mainly used for on-site crustal stress measurement.

Description

technical field [0001] The invention relates to a method and a measuring device for on-site testing of ground stress, in particular to a measurement test for calculating ground stress through a method of relieving stress on site rock mass casing, and belongs to the field of rock mass mechanics and engineering technology. Background technique [0002] With the current increase in the number of deep underground projects that need to be built in the fields of water conservancy and hydropower, mining, and transportation. Factors such as the deterioration of excavation geological conditions, the increase of ground stress, the increase of broken rock mass, the increase of water head pressure and water inflow, and the increase of ground temperature have a significant impact on deep underground engineering. In order to study the mechanical properties of deep underground engineering rock mass, especially The more direct and economical way to measure the stress parameters of engineeri...

AI Technical Summary

Problems solved by technology

If the ratio of resin and curing agent is not properly controlled, the performance of the sensor produced will be unstable, and improper temperature control may also lead to failure of the production process

[0005] In view of the problems existing in the existing rock mass measurement methods and devices, for example, in the traditional casing stress relief method, the strain rosette is directly attached to the hole wall rock mass, so that the contact surface between the strain rosette and the hole wall is small, and it is difficult to ensure the cementation quality; Due to the strict production requirements and difficult operation of the epoxy resin hollow inclusion sensor of the body strain gauge, a method based on casing stress relief and indirect strain measurement is proposed, which can conveniently and accurately measure the stress of the rock mass, and is suitable for high temperature, Recyclable ground stress measurement device for harsh measurement environments such as water

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