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Mining Publication: Load and Deflection Response of Ventilation Stoppings to Longwall Abutment Loading: A Case Study
Keywords: Concrete Longwall mining Point load tests Stoppings Strength of materials
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: August 2001
Authors: DC Oyler, G Hasenfus, GM Molinda
Conference Paper - August 2001
Download PDF Document (0.70 MB)
NIOSHTIC2 Number: 20021405
In: Peng SS, Mark C, Khair AW, eds. Proceedings of the 20th International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001 Aug; :34-41
Few studies have specifically measured and documented the large-scale loading behavior and durability of ventilation stoppings to mining induced movements, particularly from longwalls. Ventilation stoppings are more commonly the concern of ventilation engineers, and ventilation stopping response to ground movement has only been documented in an incidental manner. This paper presents the investigations of underground measurements that have been conducted to determine the loading response of stoppings constructed from lightweight aggregate concrete masonry units (CMU). These investigations have produced some interesting results that may prove beneficial, not only for developing and assessing alternative stopping construction techniques, but also for designing and selecting standard construction methods for use in varying mining conditions. For instance, the interface friction that results from wedging a CMU stopping during construction plays a substantial role in its ability to resist both lateral and vertical loads. Although they are not intended for ground support, the study showed that block stoppings can resist vertical loads of at least 2,700 to 3,000 kN. Asymmetric loading of a stopping may result in localized failure of blocks within a stopping, which, depending on the severity, can be a precursor of impending stopping failure. In addition to measurement results and implications, the paper will also present details of field measurement methods used to assess stopping response. Stopping stiffness and material strength characteristics will also be presented.
Image of publication Load and Deflection Response of Ventilation Stoppings to Longwall Abutment Loading: A Case StudyConference Paper - August 2001
Download PDF Document (0.70 MB)
NIOSHTIC2 Number: 20021405
In: Peng SS, Mark C, Khair AW, eds. Proceedings of the 20th International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001 Aug; :34-41
See Also
Analysis and Design Considerations for Superimposed Longwall Gate Roads
Benchmarking Longwall Dust Control Technology and Practices
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Development of Stress Measurements and Instrument Placement Techniques for Longwall Coal
Horizontal Stress and Longwall Headgate Ground Control
Local Earthquake Tomography for Imaging Mining-Induced Changes Within the Overburden above a Longwall Mine
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Strength Characteristics and Air-Leakage Determinations for Alternative Mine Seal Designs
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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