Download or read book Influence of Geologic Structures on Stress Variation and the Potential for Rockbursting in Mines with Particular Reference to the Lucky Friday Mine Idaho written by Jeffrey Keith Whyatt and published by . This book was released on 2000 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rockbursts written by Wilson Blake and published by Society for Mining Metallurgy & Exploration. This book was released on 2014-05-14 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The occurrence of rockbursts poses a significant and growing threat to mines--and miners--throughout North America. High stress on brittle rock structures during mining operations can produce sudden, explosive reactions that result in costly mine failures, serious injury, and even death. Using a series of case studies, this essential reference documents the experiences of 15 of the most rockburst-prone mines in the US and Canada over the last century. The book provides an historical analysis of rockburst activity along with state-of-the-art strategies for anticipating and preventing this dangerous and disruptive phenomenon. This vital resource provides a primer on rockbursts, including an examination of the conditions that favor their occurrence. The text highlights practical methods to alleviate this danger, including controlling blasting times, changing mining methods, altering the extraction sequence, utilizing backfill, employing de-stress blasting, and using yielding supports. Packed with dozens of cost-saving and potentially life-saving ideas, this book is an important resource for mining engineers and operators who work in hard-rock mines. Chapters include: The Rockburst Phenomenon Brunswick Mine (Bathurst, New Brunswick) Lake Shore Mine (Kirkland Lake, Ontario) Lake Shore and Wright-Hargreaves Mines at Depth Macassa Mine (Kirkland Lake, Ontario) Falconbridge No. 5 Shaft (Sudbury, Ontario) Strathcona Mine (Onaping, Ontario) Creighton Mine (Sudbury, Ontario) Copper Cliff North Mine (Sudbury, Ontario) Quirke Mine (Elliot Lake, Ontario) Campbell Mine (Red Lake, Ontario) Lucky Friday Mine (Mullen, Idaho) Star Mine (Burke, Idaho) Galena Mine (Wallace, Idaho) Sunshine Mine (Kellogg, Idaho) Rockbursting at Kirkland Lake and Coeur d'Alene)

Download or read book In Situ Stress at the Lucky Friday Mine in Four Parts written by Jeff K. Whyatt and published by . This book was released on 1995 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geologic Investigations Near an Underhand Cut and fill Stope Lucky Friday Mine Mullan ID written by Douglas F. Scott and published by . This book was released on 1993 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In Situ Stress at the Lucky Friday Mine in Four Parts written by Jeff K. Whyatt and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determining the In situ Stress Field on the 4250 Level in the Lucky Friday Mine written by Michael David Allen and published by . This book was released on 1979 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Differential Wall Rock Movements Associated with Rock Bursts Lucky Friday Mine Coeur D Alene Mining District Idaho USA written by B. G.K. White and published by . This book was released on 1995 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rock Mechanics Investigations at the Lucky Friday Mine written by W. G. Pariseau and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rock Mechanics Investigations at the Lucky Friday Mine written by T. J. Williams and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rock Mechanics Investigations at the Lucky Friday Mine written by J. K. Whyatt and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Role of fault slip on mechanisms of rock burst damage Lucky Friday Mine Idaho USA written by B. G. White and published by . This book was released on 1999 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various methods of monitoring slip movements on bedding planes, as well as examination of rock burst damage in stopes, suggest that many rock bursts in the Lucky Friday Mine are closely associated with these movements. Slip displacements along bedding simultaneously reduce the physical dimensions of stopes and increase compressive stress along stope margins. Such changes, in turn, contribute directly to sudden failures of rock and cemented sandfill surrounding stopes. We believe that the reduction of rock burst hazards must be based on a clear understanding of the basic mechanisms involved. The current work emphasizes the mechanical role of wall rock movement and seismicity in generating conditions that promote rock burst damage. Based on our interpretations of these mechanisms, we briefly address several hypothetical practices that could influence rock burst hazards in similar mining situations. The overall goal of this research is to advance the NIOSH mission of improving the health and safety of the nation's workers.

Download or read book Rockburst Evolutionary Process and Energy Dissipation Characteristics written by Dazhao Song and published by Springer. This book was released on 2019-04-27 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates the evolution process of rockburst based on the energy dissipation theory and proposes appropriate active prevention and control technologies. It discusses the electromagnetic radiation (EMR) generated by coal rock fractures as a measurement of the amount of dissipated energy, and the use of EMR to experimentally observe the time domain characteristics of energy dissipation during coal rock failure processes. It then proposes the concept of the rockburst activity domain system (RADS), establishes a dynamic pressure model of rockburst, and describes the energy criterion for rockburst instability. Lastly, it presents two waterjet cutting-based cases of pressure relief and rockburst prevention. The book serves as a reference resource for mine safety workers, engineering technicians, scientists, graduate students and undergraduates engaged in research on dynamic hazards such as rockburst..

Download or read book The Role of Geological Factors in the Mining Induced Rock Stress Effects written by David John Woodhams Mitchell and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Survey of Mining Associated Rockbursts written by Janet C. Johnston and published by . This book was released on 1988 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parameters related to rockbursts, specifically types of ore, mining operation, magnitude-frequency statistics, maximum magnitudes, depths, and presence of precursory phenomena, are compiled for various tectonic/geologic regions. Data from Canada, the United States, Great Britain, Sweden, West Germany, Poland, Czechoslovakia, South Africa, the USSR, China, Japan, and Australia are tabulated and sorted according to type of geologic conditions. Similarities and differences in source characteristics between rockbursts and natural crustal earthquakes are examined and classified. Type I rockbursts are directly related to an advancing mine face; Type II events involve induced movement along preexisting fault planes. Reliability of prediction of the maximum size of rockbursts based upon mine area, excavation rate, geology, and extent of fracturing of adjacent rock is assessed with special focus on consistency between different areas of the world. The number of Type I rockbursts is found to be a direct function of excavation rate; their locations are consistently determined by location of the mine face and by local geological structure. When Type I events results in new fracture planes, high stress drops result. It is possible that an inactive fault can be activated by the presence of a mine, resulting in Type II rockbursts. Search for reliable precursory phenomena has been unsuccessful. The upper limit for Type I events seems to be controlled by the strength of the rock, whereas the upper limit for Type II events is a completely open question at this time.

Download or read book Rockbursts and Seismicity in Mines written by N. C. Gay and published by . This book was released on 1984 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geologic and Tectonic Characteristics of Rockbursts written by and published by . This book was released on 1995 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modern mining enterprises have attained such scales of engineering activity that their direct influence to a rock massif and in series of cases to the region seismic regime doesn't provoke any doubts. Excavation and removal of large volumes of rock mass, industrial explosions and other technological factors during long time can lead to the accumulation of man-made changes in rock massifs capable to cause catastrophic consequences. The stress state changes in considerable domains of massif create dangerous concentration of stresses at large geological heterogeneities - faults localized in the mining works zone. External influence can lead in that case to such phenomena as tectonic rockbursts and man-made earthquakes. The rockbursts problem in world mining practice exists for more than two hundred years. So that its actuality not only doesn't decrease but steadily mounts up as due to the mining works depth increase, enlargement of the useful minerals excavations volumes as due to the possibility of safe use of the rock massif potential energy for facilitating the mastering of the bowels of the Earth and for making that more cheap. The purpose of present work is to study the engineering activity influence to processes occurring in the upper part of Earth crust and in particular in a rock massif. The rock massif is treated in those studies as a geophysical medium - such approach takes into account the presence of block structure of medium and the continuous exchange of energy between parts of that structure. The idea ''geophysical medium'' is applied in geophysics sufficiently wide and stresses the difference of actual Earth crust and rock massifs from the continuous media models discussed in mechanics.