Device and method for testing tensile resistance of multiple-row grouped pillars in inclined goaf
US11703431B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2022 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Feb 17, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and a method for testing tensile resistance of multiple-row grouped pillars in an inclined goaf are provided. The bottoms of stands of the device are connected with a testing machine base, and the tops of the stands of the device are connected with a transverse frame; an upper slideable clamping seat and a lower slideable clamping seat are semi-cylindrical blocks, multiple lower loading jaws that are positioned to have a same central line are arranged on the lower slideable clamping seat, each of the lower loading jaws is opposite to a corresponding one of the upper loading jaws, the lower loading jaws are welded to the lower slideable clamping sea to test the tensile resistance of samples together; the upper part of the upper slideable clamping seat is connected with an upper pressure disk, and the lower slideable clamping seat is connected with a lower pressure disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.