Full-Scale Demonstration and Performance Evaluation of a Hybrid Geopolymer/Biopolymer Cementitious Material Developed for Pumpable Roof Supports in Underground Mines

Details

• Personal Author:
  Batchler, Timothy ; Nikvar-Hassani A ; Zhang L
• Description:
  Recently, a new hybrid geopolymer/biopolymer (GP/BP) cementitious material was developed for improving the performance of pumpable roof supports in underground mines. This study demonstrates the application of the hybrid GP/BP cementitious material and validates its effectiveness in full-scale. In this regard, eight (8) full-size (0.61 m diameter and 1.52 m height) cribs were produced in collaboration with Minova International Ltd and tested at the National Institute for Occupational Safety and Health (NIOSH) Mine Roof Simulator (MRS) Laboratory. These full-size cribs were produced with different material configurations to evaluate the effect of water to solid (W/S) ratio, Portland cement (PC) content, and BP dosage. The results demonstrated and validated the effectiveness of the hybrid GP/BP cementitious material in increasing the peak and residual bearing capacities of pumpable cribs and eliminating the issue of deterioration when exposed to air compared with the conventional Portland cement/fly ash (PC/FA) cementitious material currently used in practice. On average, the peak uniaxial compressive strength (UCS) and the highest residual UCS after peak of the full-size cribs produced from the hybrid GP/BP cementitious material are 1.90 and 1.33 times of those of the PC/FA-based full-size cribs by one company and 2.32 and 1.66 times of those of the PC/FA based full-size cribs by the other company, respectively. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Author Keywords: Pumpable Roof Support Biopolymer Compressive Strength Fly Ash Geopolymer Ground Control Portland Cement Roof Supports Underground Mines
• Series:
  Mining Publications
• ISSN:
  2524-3462
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Arizona ; OSHA Region 3 ; OSHA Region 9 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  41
• Issue:
  2
• NIOSHTIC Number:
  nn:20069250
• Citation:
  Min Metall Explor 2024 Apr; 41(2):669-680
• Contact Point Address:
  Arash Nikvar-Hassani, Department of Civil and Architectural Engineering and Mechanics, The University of Arizona, Tucson, AZ, USA
• Email:
  nikvar@arizona.edu
• Federal Fiscal Year:
  2024
• Peer Reviewed:
  True
• Source Full Name:
  Mining, Metallurgy & Exploration
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e040e038bdbfb4a8635efd23f5b9c7a040f5193674ed4fe88ce64b3f31d29f316c3fe19a91e1f8c9bafae130028d603fed60ed4546fe22174f63125e15c3db7b
• Download URL:
  https://stacks.cdc.gov/view/cdc/215692/cdc_215692_DS1.pdf
• File Type:
  [PDF - 4.08 MB ]