Method of estimating ground pressure
US4107981A · kind A · utility
18Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Jun 30, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02827
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of estimating ground pressure in rock samples by making use of the Kaiser effect of acoustic emission. The method comprises the steps of applying load to a rock sample, increasing the load and counting the summation of the acoustic emissions produced from the interior of the rock sample. The ground pressure is determined from the magnitude and direction of hysteretic maximum stress in the ground where the rock sample was extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.