Method and device for monitoring the load on hydraulic powered shield supports for underground mining
US6056481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Sep 4, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D23/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
According to the invention, monitoring the load on hydraulic powered shield supports in underground use is performed by using the controller (13) serving for extraction control, which is equipped with microelectronics for load monitoring and load control, the components of the powered shield support being assigned sensors (14 to 18) whose electric measured values are used by the controller (13) for evaluating the measured signals and for driving the hydraulic rams (6, 7) and/or the angle cylinder (11) assigned to the powered shield support. The load control is preferably designed here in such a way that the critical load situations "one-sided loading" and/or "tip-toeing" are detected as early as during the setting operation, with the aid of appropriate sensors, and are rendered non-damaging in their effect by appropriately driving the hydraulic rams and/or the angle cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.