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Results 1 - 10 of 29
8/1/2004 - Conference papersThis paper focuses on a computer simulation used to model roof behavior and rock bolt interaction in a collaborative study of ground behavior, reinforcement performance, and stress redistribution in a coal mine entry under severe horizontal stress.
8/1/2001 - Conference papersA statistical study of roof bolt performance was conducted in 37 U.S. mines. Analysis of the results led to guidelines for making preliminary estimates for bolt length, capacity, and pattern to improve roof stability in difficult conditions.
10/1/2000 - Information CircularsThe proceedings provide information on several new technologies including guidelines for roof bolt length, pattern, and capacity; a new design method for longwall tailgate supports; and a technique for measuring loads developed within cable bolts.
8/18/2015 - News and announcementsA feature story about through-the-earth communcations technologies available for mine emergencies.
8/20/2013 - PC softwareA software program to help select roof bolts for primary support in underground coal mines
Technology News 532 - Collapsible Drill Steel Enclosure for Reducing Roof Bolting Machine Drilling Noise9/1/2008 - Technology NewsResearch conducted by NIOSH has focused on producing noise treatments to reduce noise generated by the Roof Bolting Machine. A drill steel enclosure for reducing roof bolting machine drilling noise has been developed as an engineering control.
10/1/2007 - Conference papersThis paper discusses the methods NIOSH used to identify noise sources on a roof bolting machine while drilling.
Twenty-four Conferences; More than One-hundred and Seventy Papers; Understanding Roof Bolt Selection and Design Still Remains Priceless8/1/2006 - Conference papersThis retrospective paper discusses changes in bolt types and usage over the past 24 years, pointing out some of the biggest myths and hailing the most significant advances.
8/1/2006 - Information CircularsThis trainer's guide is designed as a reference manual. The purpose is to offer information and examples to skills trainers to assist them in structuring training for new operators of Walk-Thru roof bolting machines.
8/1/2005 - Conference papersNIOSH continues to investigate the behavior of fully grouted roof bolts in the weak roof rock of Pittsburgh's Safety Research Coal Mine. This paper describes the results of three roof bolt studies.