WIPP supplementary roof support system Room 1, Panel 1: Geotechnical field data analysis report
The design of the Room 1, Panel 1, supplementary roof support system was finalized in September 1991, and the system successfully installed in the test bin area between the bulkheads by December 1991. Simultaneously with the support system installation, existing monitoring system was upgraded to meet the needs of the installed roof support. This included extensometers, closure stations, rockbolt load cells as well as survey measurements of roof sag and floor lift. A Project Control Group (PCG) was established in order to monitor room and support system performance. Weekly meetings of the PCG were held to review all monitored data against criteria set in the initial design, and to modify these where necessary. Records of these meetings have been kept, with copies of all data summaries and action notes. These data records are maintained in the Engineering data files. After more than ten months of monitoring and reviewing experience, several modifications have been made both to the way data has been reported as well as to the load adjustment criteria. The support system has performed as expected in the design, with no signs of instability developing considering the rates of roof deformation, the rock bolt loads and the observed fracture behavior in the roof. This is particularly true of the horizon in which the rockbolt anchors are located, the most critical part of the design. The distribution of load build-up, throughout the 286 rockbolt load cells installed, in the Room 1 has been found satisfactory, and the load increases as evaluated by the PCG on a weekly basis have been within the acceptable range. The minimum life of the installed support system is estimated at 15 years based on the highest roof expansion rate experienced to date. This report provides analysis of geotechnical field data collected up to December 1992.
- Research Organization:
- Westinghouse Electric Corp., Carlsbad, NM (United States). Waste Isolation Div.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-86AL31950
- OSTI ID:
- 10163706
- Report Number(s):
- DOE/WIPP-93-012; ON: DE93014889; TRN: 93:015323
- Resource Relation:
- Other Information: PBD: Mar 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
WIPP supplementary roof support system, Room 1, Panel 1: Geotechnical field data analysis bi-annual report
Geotechnical field data and analysis report, July 1990--June 1991. Volume 1