Device and method for measuring dynamic evolution of three-dimensional disturbed stress under mining disturbance
US11740371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2019 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Feb 23, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2001/526
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a device for measuring dynamic evolution of a three-dimensional disturbed stress under mining disturbance, comprising an outer steel cylinder. Three three-direction sensing units are arranged on the outer steel cylinder. Any two of three stress measurement directions of each three-direction sensing unit are perpendicular to each other. Nine stress measurement directions of the three three-direction sensing units are different. The present invention also discloses a method for measuring dynamic evolution of a three-dimensional disturbed stress under mining disturbance. In the present invention, stresses are measured from three perpendicular directions which are inclined, so the difficulty in measuring a three-dimensional stress in a borehole is overcome; and a spatial stress value is measured by three three-direction sensing units, and thus the size and direction of a disturbed principal stress in the borehole are calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.