Modify Selection
- Research methods and measures:
- Weak rock
Home Links
Results 1 - 10 of 20
-
1/1/2011 - Peer reviewed journal articlesA field-expedient test method and portable on site test equipment have been developed to measure shotcrete strength in the first six hours after application.
-
7/1/2010 - Conference papersThis paper makes use of numerical models to examine the interaction between typical pillar systems and the surrounding rock mass for weak and strong geological conditions at various spans and depths of cover.
-
7/1/2009 - Conference papersThis paper describes a NIOSH field study to evaluate mine entries with highly moisture-sensitive roof rock for long-term stability and seasonal effects. It presents the results from the field study and the key issues determined from the study.
-
2/1/2009 - Conference papersThis paper describes the work NIOSH has completed in evaluating three moisture-sensitivity index tests on roof rocks from 23 U.S. coal mines.
-
1/1/2008 - Peer reviewed journal articlesMoisture-sensitive roof rocks have contributed to time-dependent roof falls. NIOSH research proves the value of a wet/dry cycling test for rock evaluation.
-
10/1/2003 - Information CircularsThis report describes the geologic origin, association, and potential danger from the most common hazards. Discussions of weak rock include drawrock, rider coals, head coal, stackrock, and stream valley effects.
-
4/1/2021 - Peer reviewed journal articlesA study assessing the strength characteristics of coal under high confinement to gain insights for pillar stability and design.
-
4/1/2015 - Reports of InvestigationsA report on a research study to document and develop safe practices for the use of shotcrete as ground support in underground mines, particularly in underground metal mines operating in weak host rock.
-
7/17/2014 - Contracts and cooperative agreementsA capacity-building contract to address ground control design issues in weak rock masses in Nevada.
-
1/1/2011 - Peer reviewed journal articlesNIOSH is investigating the use of shotcrete in weak rock mass mines with the objective of reducing fatalities and injuries resulting from rock fall accidents.
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program