Mine roof support control
US4134270A · kind A · utility
8Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1976 |
| Grant date | Jan 16, 1979 |
| Priority date | — |
| Expiry date | Dec 21, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D23/146
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mine roof support control monitoring system in which at least some of a row of self advancing mine-roof supports at a mine face each include means for providing data relating to successive advances of that support. This data is accumulated by other means of the system and stored to give readily available indicationsof differences of actual support advances. The system preferably further includes means for pre-energizing the advance mechanisms of such supports to eliminate data relating to slack or tolerance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.