Analysis Of Roof Bolt Systems - Centers for Disease,
ANALYSIS OF ROOF BOLT SYSTEMS Christopher Mark, Chief, Rock Mechanics Section Gregory M. Molinda, Research Geologist Dennis R. Dolinar, Mining Engineer NIOSH, Pittsburgh Research Laboratory Pittsburgh, Pennsylvania USA ABSTRACT Despite more than half a century of experience with roof bolting, no design method has received wide acceptance. To begin to
(PDF) Analysis of roof bolt systems - researchgate.net
program called Analysis of Roof Bolt Systems (ARBS). INTRODUCTION Roof bolts are the first line of defense protecting mineworkers from the hazards of
CDC - Mining - Analysis of Roof Bolt Systems - NIOSH
Performance was measured in terms of the number of roof falls that occurred per 10,000 ft of drivage. The study found that roof falls are rare when the roof is strong and the stress is low, even with light roof bolting patterns. The focus of this paper is on the more difficult conditions, where the roof is weaker and/or the stress is higher.
A CASE STUDY OF ROOF BOLTING TASKS TO IDENTIFY
An analysis of roof bolting tasks was conducted at this mine to identify early warning signs of cumulative trauma. Health and safety risk factors were identified and recommendations to reduce cumulative trauma exposure were provided. Recommendations addressed job pro cedures, equipment design, and worker awareness of risk factors. Keywords ergonomics, mining,
Human Factors Analysis of Roof Bolting Hazards in,
The U.S. Bureau of Mines conducted a human factors analysis of hazards associated with roofholting activities in underground coal mines. Emphasis was placed on hazards related to the movement of the drill-head boom or mast of a roof bolting machine. The objective was to identify hazards and recom mend solutions.
Human factors analysis of roof bolting hazards in,
The data collection effort consisted of analysis of Mine Safety and Health Administration accident data; visits to underground mines and interviews with experienced roof bolting machine operators; discussions with roof bolting machine manufacturers; interviews with workers injured while performing roof bolting tasks; and reviews of research on roof bolting safety. A set of
THE INTRODUCTION OF ROOF BOLTING TO U.S. UNDERGROUND
From an engineering standpoint, roof bolts are inherently more effective than the wood timbers they replaced. Roof bolts promised to dramatically reduce the number of roof fall accidents, which then claimed hundreds of lives each year, and they were initially hailed as “one of the great social advances of our time.”
Chapter 1.0 Introduction
Roof bolting can be ranked as one of most important technological developments in the field of ground control in the entire history of mining (Mark, 2002). It is an essential component in the design of underground excavations and has been used to provide an overall ground improvement scheme since the middle of the last century. Roof bolting has become the primary support
Roof bolting in underground mining: a state-of-the-art,
It should be noted that geological conditions such as the strata type, rock properties, in situ stress, and planes of weakness play an important role in the successful application of any roof bolting system. These factors should be specified as accurately and quantitatively as possible in the design of any roof bolting system.
Reinforcement analysis and design of mechanical roof,
The major function of roof bolting in this case is to create frictional resistance by tensioning the roof bolts so that the individual layers are combined into one single thick layer. A computer program and nomographs are developed for the determination of proper bolting pattern and
Human Reliability Analysis of Roof Bolting Operation in,
16/11/2015· Human Reliability Analysis of Roof Bolting Operation in Underground Coal Mines. Junxiang Tu, Corresponding Author. junxtu@163; College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116 China. Correspondence to: Junxiang Tu, College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108 China.
Human Reliability Analysis of Roof Bolting Operation in,
16/11/2015· Human Reliability Analysis of Roof Bolting Operation in Underground Coal Mines. Junxiang Tu. Corresponding Author. E-mail address: junxtu@163. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116 China. Correspondence to: Junxiang Tu, College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou,
Roof bolting hazard analysis study. Final report, 1 July,
OSTI.GOV Technical Report: Roof bolting hazard analysis study. Final report, 1 July 1976--30 June 1977
NIOSHTIC-2 Publications Search - 10000917 - Roof bolting,
Roof bolting hazard analysis study. Authors Adkins-JH; Hargreaves-WJ Jr. Source NTIS: PB 284 016 Available for Reference At Bureau Libraries :134 pages Link NIOSHTIC No. 10000917,
Reinforcement analysis and design of mechanical roof,
In order to design roof bolting systems safely and economically, it is essential to understand the flexural behaviour of the immediate roof. Based on the strata sequence, the strata in the immediate roof are divided into three types. The flexural behaviour of the three strata types are investigated in terms of the following effects: roof span, horizontal stress, thickness and
Roof bolting in underground mining: a state-of-the-art,
With continuing investigations and developments, roof bolting today can in most cases successfully reinforce the mine roof in underground mining. In order to cope with the increasing use of roof bolts, efforts should be made to maximize the safety and minimize the cost. With regard to mechanical bolting, two important parameters need more advanced improvements
An upper bound design method for roof bolting support in,
28/04/2021· We put forward an upper bound design method for roof bolting support in such roadways, and analyze the influence laws of varying factors on the required supporting force of roof bolt. Also, we provide several practical engineering recommendations, and verify the effectiveness of the proposed method through a site application instance. The research in this
COMPLETED - UNT Digital Library
HUMAN FACTORS ANALYSIS OF ROOF BOLTING HAZARDS IN UNDERGROUND COAL MINES By Fred C. Turin1 and others ABSTRACT The U.S. Bureau of Mines conducted a human factors analysis of hazards associated with roof bolting activities in underground coal mines. Emphasis was placed on hazards related to the movement of the drill-head boom or mast of a
Development of a roof bolter drilling control process to,
27/02/2021· Roof bolting has been the primary means to improve mine safety in the aspect of preventing different types of roof falls in underground mines in recent decades (Mark 2002).However, based on the published research, underground roof bolting operators exhibit a continued risk for overexposure to airborne levels of respirable coal and crystalline silica dust
URRIEROWLQJ Rock Bolt Pulling Force Distribution Pattern,
15/12/2021· frame and roof bolting S I Ivanov, N V Titov, A A Privalov et al.-Application of Wireless Sensor Network in Rock Bolt Pulling Force Distribution Pattern Monitoring Zhuo Yang, Wenxiang Peng, Jiaqiang Cao et al.-Analysis of main nutrients among different edible parts of Nainaiqingcai mustard under the alpine cold climate Jie Ma, Wen Qu, Rui Wu et al.-This
Human Reliability Analysis of Roof Bolting Operation in,
16/11/2015· Human Reliability Analysis of Roof Bolting Operation in Underground Coal Mines. Junxiang Tu, Corresponding Author. junxtu@163; College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116 China. Correspondence to: Junxiang Tu, College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108 China.
Human Reliability Analysis of Roof Bolting Operation in,
16/11/2015· Human Reliability Analysis of Roof Bolting Operation in Underground Coal Mines. Junxiang Tu. Corresponding Author. E-mail address: junxtu@163. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116 China. Correspondence to: Junxiang Tu, College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou,
Roof bolting hazard analysis study. Final report, 1 July,
OSTI.GOV Technical Report: Roof bolting hazard analysis study. Final report, 1 July 1976--30 June 1977
roof bolting analysis - sotfuna
EVALUATION OF ROOF BOLTING REQUIREMENTS BASED . Sep 15, 2004 · Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. with the
Evaluation of Roof Bolting Requirements Based on In-Mine,
Roof bolting is the most popular method for underground openings in the mining industry, especially in the bedded deposits such as coal, potash, salt etc. In fact, all U.S. underground coal mine entries are roof-bolted as required by law. However, roof falls still occur frequently in the roof bolted entries. The two possible reasons are: the lack of knowledge of and technology to
COMPLETED - UNT Digital Library
HUMAN FACTORS ANALYSIS OF ROOF BOLTING HAZARDS IN UNDERGROUND COAL MINES By Fred C. Turin1 and others ABSTRACT The U.S. Bureau of Mines conducted a human factors analysis of hazards associated with roof bolting activities in underground coal mines. Emphasis was placed on hazards related to the movement of the drill-head boom or mast of a
Safety of roof-bolting operations in underground coal,
01/11/1983· Analysis of Disabling Injuries Related to Roof Bolting in Underground Bituminous Coal Mines 1973 (Information Report 1017). Health and Safety Analysis Center, MSHA, Denver. Schaffer, L., Gavin, G.R. and Woodward, J.L., 1977. Collection of Coal Mining Industry Statistics for Normalization of Accident Data. Woodward Associates, Inc., San Diego, CA. Seals, E.D.,
Analytical Solution for the Deformation and Support,
25/10/2021· According to the above analysis, the 1st-2nd roof strata are likely to be damaged,, “Monitoring of stand-and-roof-bolting support: design optimization,” Acta Geodynamica et Geomaterialia, vol. 10, no. 2, pp. 215–226, 2013. View at: Publisher Site | Google Scholar; F. Qiang, L. Weiwei, F. Shenggang, J. Binsong, and S. Linpo, “Analytical solution for deformation
URRIEROWLQJ Rock Bolt Pulling Force Distribution Pattern,
15/12/2021· frame and roof bolting S I Ivanov, N V Titov, A A Privalov et al.-Application of Wireless Sensor Network in Rock Bolt Pulling Force Distribution Pattern Monitoring Zhuo Yang, Wenxiang Peng, Jiaqiang Cao et al.-Analysis of main nutrients among different edible parts of Nainaiqingcai mustard under the alpine cold climate Jie Ma, Wen Qu, Rui Wu et al.-This
Octave Band Spectrum - an overview | ScienceDirect Topics
For an analysis length of L,, 12.4.2 Noise controls for roof-bolting machines. Roof-bolting machines are extensively used in underground coal mines to drill and install bolts for roof support. The majority of these machines involve a manual cycle where the operator inserts a drill steel into the chuck and drills the hole, then inserts an epoxy cartridge into the hole, removes the drill,
