Interpreting Backfill QA/QC Test Data: Do We Need an Industry Standard?

Details

• Personal Author:
  Pakalnis, Rimas T. ; Seymour B ; Stone D
• Description:
  Most mines using backfill routinely carry out quality control (QC) testing of backfill mixes with unconfined compression test cylinders. This is true for paste operations, hydraulic fill operations, and cemented rockfill operations worldwide. However, a large number of mines simply do not prepare and test the backfill samples in a consistent manner and fail to properly analyze or interpret the test results. Conventional concrete test criteria are not applicable given the differences in the mix constituents and the fact that a large number of the backfill QC test cylinders typically fail to achieve the target strength. Standard industry practices are needed to improve the analysis and interpretation of QC test results and to provide a better means of determining if the backfill is achieving its intended target strength. This paper will attempt to lay the groundwork for standard industry practices and will address several key questions raised by operators, such as how laboratory test data compares to in-stope performance, and how many QC tests should fail before a red flag should be raised. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Quality Control Safety
• Keywords:
  Coal Mines Concretes Mining Industry Quality Control Underground Mining
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; OSHA Region 3 ; OSHA Region 8 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-6
• NIOSHTIC Number:
  nn:20055604
• Citation:
  2019 SME Annual Meeting, February 24-27, 2019, Denver, Colorado, preprint 19-043. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2019 Feb; :1-6
• Federal Fiscal Year:
  2019
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  2019 SME Annual Meeting, February 24-27, 2019, Denver, Colorado, preprint 19-043
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:fc44e011ca10b3318d0c11deb98dbfef44ba6c4f47319e1285d4c585755583d0ecec8830ebce86db157ee562ec9813f4d85c0d95f7ca99bf18003edebb4e87ea
• Download URL:
  https://stacks.cdc.gov/view/cdc/227847/cdc_227847_DS1.pdf
• File Type:
  [PDF - 580.64 KB ]