Download or read book Explosion Pressure Design Criteria for New Seals in U S Coal Mines written by M. J. Sapko and published by . This book was released on 2007 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seals are barriers constructed in underground coal mines throughout the United States to isolate abandoned mining panels or groups of panels from the active workings. Historically, mining regulations required seals to withstand a 140-kPa (20-psig) explosion pressure. However, the Mine Improvement and New Emergency Response Act ("MINER Act") requires the Mine Safety and Health Administration (MSHA) to increase this design standard by the end of 2007. This report provides a sound scientific and engineering justification to recommend a three-tiered explosion pressure design criterion for new seals in coal mines in response to the MINER Act. Much of the information contained in this report also applies to existing seals. Engineers from the National Institute for Occupational Safety and Health (NIOSH) examined seal design criteria and practices used in the United States, Europe, and Australia and then classified seals into their various applications. Next, the engineers considered various kinds of explosive atmospheres that can accumulate within sealed areas and used thermodynamic calculations and simple gas explosion models to estimate worst-case explosion pressures that could impact seals. Three design pressure-time curves were developed for the dynamic structural analysis of new seals under the conditions in which those seals may be used: unmonitored seals where there is a possibility of methane-air detonation or high-pressure nonreactive shock waves and their reflections behind the seal; unmonitored seals with little likelihood of detonation or high-pressure nonreactive shock waves and their reflections; and monitored seals where the amount of potentially explosive methane-air is strictly limited and controlled. Figure I is a simple flowchart that illustrates the key decisions in choosing between the monitored or unmonitored seal design approaches and the three design pressure-time curves. For the first condition, an unmonitored seal with an explosion run-up length of more than 50 m (165 ft), the possibility of detonation or high-pressure nonreactive shock waves and their reflections exists. The recommended design pressure-time curve rises to 4.4 MPa (640 psig) and then falls to the 800-kPa (120-psig) constant volume (CV) explosion overpressure. For unmonitored seals with an explosion run-up length of less than 50 m (165 ft), the possibility of detonation or high-pressure nonreactive shock waves and their reflections is less likely. A less severe design pressure-time curve that simply rises to the 800-kPa (120-psig) CV explosion overpressure may be employed. For monitored seals, engineers can use a 345-kPa (50-psig) design pressure-time curve if monitoring can ensure that (1) the maximum length of explosive mix behind a seal does not exceed 5 m (16 ft) and (2) the volume of explosive mix does not exceed 40% of the total sealed volume. Use of this 345-kPa (50-psig) design pressure-time curve requires monitoring and active management of the sealed area atmosphere. These design pressure-time curves apply to new seal design and construction. NIOSH engineers used these design pressure-time curves along with the Wall Analysis Code (WAC) from the U.S. Army Corps of Engineers and a simple plug analysis to develop design charts for the minimum required seal thickness to withstand each of these explosion pressure-time curves. These design charts consider a range of practical construction materials used in the mining industry and specify a minimum seal thickness given a certain seal height. Results of these analyses show that resistance to even the 4.4-MPa (640-psig) design pressure time curve can be achieved using common seal construction materials at reasonable thickness, demonstrating the feasibility and practical applications of this report. Engineers can also use other structural analysis programs to analyze and design seals by using the appropriate design pressure-time curve for the structural load and a design safety factor of 2 or more. Finally, this report also provides criteria for monitoring the atmosphere behind seals. NIOSH will continue research efforts to improve underground coal mine sealing strategies and to prevent explosions in sealed areas of coal mines. In collaboration with the U.S. National Laboratories, NIOSH will further examine the dynamics of methane and coal dust explosions in mines and the dynamic response of seals to these explosion loads. This upcoming project seeks to better understand the detonation phenomena and simple techniques to protect seals from transient pressures. Additional work will include field measurements of the atmosphere within sealed areas. Successful implementation of the seal design criteria and the associated recommendations in this report for new seal design and construction should significantly reduce the risk of seal failure due to explosions in abandoned areas of underground coal mines.
Download or read book The State of Mine Safety and Health written by United States. Congress. Senate. Committee on Health, Education, Labor, and Pensions and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 11th US North American Mine Ventilation Symposium 2006 written by Jan M. Mutmansky and published by CRC Press. This book was released on 2006-05-18 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the eleventh in a series which documents the technical papers of the mine ventilation symposium, which was initiated in 1982 by the Underground Ventilation Committee of the Society for Mining, Metallurgy, and Exploration, Inc. In more recent years, the event has expanded to include all of North America and is known as the US/North Am
Download or read book Mine Ventilation written by E. De Souza and published by CRC Press. This book was released on 2002-01-01 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume showcases all aspects of the science and engineering of mine ventilation and health and safety, with special focus on the applied aspects of mine ventilation practice. Papers span the spectrum of mine ventilation and air conditioning.
Download or read book Injury Experience in Coal Mining written by and published by . This book was released on 1949 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ventilation Questions and Answers written by and published by . This book was released on 1992 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MT MT T MTT Product Catalog Translated English of Chinese Standard MT MT T MTT written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2018-01-01 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides the comprehensive list of Chinese Industry Standards - Category: MT; MT/T; MTT.
Download or read book Water Management at Abandoned Flooded Underground Mines written by Christian Wolkersdorfer and published by Springer Science & Business Media. This book was released on 2008-02-01 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the processes related to mine abandonment from a hydrogeological perspective and provides a comprehensive presentation of water management and innovative tracer techniques for flooded mines. After an introduction to the relevant hydrogeochemical processes the book gives detailed information about mine closure procedures. The book also includes case studies and hints, and some new methodologies for conducting tracer tests in flooded mines.
Download or read book To Punish or Persuade written by John Braithwaite and published by State University of New York Press. This book was released on 1985-06-30 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: In To Punish or Persuade, John Braithwaite declares that coal mine disasters are usually the result of corporate crime. He surveys 39 coal mine disasters from around the world, including 19 in the United States since 1960, and concludes that mine fatalities are usually not caused by human error or the unstoppable forces of nature. He shows that a combination of punitive and educative measures taken against offenders can have substantial effects in reducing injuries to miners. Braithwaite not only develops a model for determining the optimal mix of punishment and persuasion to maximize mine safety, but provides regulatory agencies in general with a model for mixing the two strategies to ensure compliance with the law. To Punish or Persuade looks at coal mine safety in the United States, Great Britain, Australia, France, Belgium, and Japan. It examines closely the five American coal mining companies with the best safety performance in the industry: U.S. Steel, Bethlehem Steel, Consolidation Coal Company, Island Creek Coal Company, and Old Ben Coal Company. It also takes a look at the safety record of unionized versus non-unionized mines and how safety regulation enforcement impacts productivity.
Download or read book Ground Engineering Principles and Practices for Underground Coal Mining written by J.M. Galvin and published by Springer. This book was released on 2016-02-02 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book teaches readers ground engineering principles and related mining and risk management practices associated with underground coal mining. It establishes the basic elements of risk management and the fundamental principles of ground behaviour and then applies these to the essential building blocks of any underground coal mining system, comprising excavations, pillars, and interactions between workings. Readers will also learn about types of ground support and reinforcement systems and their operating mechanisms. These elements provide the platform whereby the principles can be applied to mining practice and risk management, directed primarily to bord and pillar mining, pillar extraction, longwall mining, sub-surface and surface subsidence, and operational hazards. The text concludes by presenting the framework of risk-based ground control management systems for achieving safe workplaces and efficient mining operations. In addition, a comprehensive reference list provides additional sources of information on the subject. Throughout, a large variety of examples show good and bad mining situations in order to demonstrate the application, or absence, of the established principles in practice. Written by an expert in underground coal mining and risk management, this book will help students and practitioners gain a deep understanding of the basic principles behind designing and conducting mining operations that are safe, efficient, and economically viable. Provides a comprehensive coverage of ground engineering principles within a risk management framework Features a large variety of examples that show good and poor mining situations in order to demonstrate the application of the established principles in practice Ideal for students and practitioners About the author Emeritus Professor Jim Galvin has a relatively unique combination of industrial, research and academic experience in the mining industry that spans specialist research and applied knowledge in ground engineering, mine management and risk management. His career encompasses directing ground engineering research groups in South Africa and Australia; practical mining experience, including active participation in the mines rescue service and responsibility for the design, operation, and management of large underground coal mines and for the consequences of loss of ground control as a mine manager; appointments as Professor and Head of the School of Mining Engineering at the University of New South Wales; and safety advisor to a number of Boards of Directors of organisations associated with mining. Awards Winner of the ACARP Excellence Research Award 2016. The Australian Coal Industry's Research Program selects recipients to receive ACARP Research and Industry Excellence Awards every two years. The recipients are selected on the recommendation of technical committees. They are honored for achievement of a considerable advance in an area of importance to the Australian coal mining industry. An important criterion is the likelihood of the results from the project being applied in mines. Winner of the Merv Harris Award from the Mine Managers Association of Australia. The Merv Harris Award is named for Merv Harris who donated money to be invested for a continuing award in 1988. With the award, the Mine Managers Association of Australia honors members of the Association who demonstrate technical achievement in the Australian Coal Mining Industry. The first award was granted in 1990, since then, only two people have received this honor. The book has received the following awards.... AGS (Australian Geomechanics Society) congratulates Dr Galvin for these awards
Download or read book Bureau of Mines Research written by United States. Bureau of Mines and published by . This book was released on 1979 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal mining Safety in the Progressive Period written by William Graebner and published by University Press of Kentucky. This book was released on 1976-01-01 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Mine Rescue written by United States. Mining Enforcement and Safety Administration and published by . This book was released on 1976 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The 2030 Spike written by Colin Mason and published by Routledge. This book was released on 2013-06-17 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The clock is relentlessly ticking! Our world teeters on a knife-edge between a peaceful and prosperous future for all, and a dark winter of death and destruction that threatens to smother the light of civilization. Within 30 years, in the 2030 decade, six powerful 'drivers' will converge with unprecedented force in a statistical spike that could tear humanity apart and plunge the world into a new Dark Age. Depleted fuel supplies, massive population growth, poverty, global climate change, famine, growing water shortages and international lawlessness are on a crash course with potentially catastrophic consequences. In the face of both doomsaying and denial over the state of our world, Colin Mason cuts through the rhetoric and reams of conflicting data to muster the evidence to illustrate a broad picture of the world as it is, and our possible futures. Ultimately his message is clear; we must act decisively, collectively and immediately to alter the trajectory of humanity away from catastrophe. Offering over 100 priorities for immediate action, The 2030 Spike serves as a guidebook for humanity through the treacherous minefields and wastelands ahead to a bright, peaceful and prosperous future in which all humans have the opportunity to thrive and build a better civilization. This book is powerful and essential reading for all people concerned with the future of humanity and planet earth.
Download or read book Colliery Engineering written by and published by . This book was released on 1945 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Royal Commission on the Pike River Coal Mine Tragedy written by New Zealand. Royal Commission on the Pike River Coal Mine Tragedy and published by . This book was released on 2012 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the tragic events at Pike River Coal Mine on 19 November that resulted in the loss of 29 lives. Propsoals and recommendations for improvements to the safety of people working in mines.
Download or read book Safety and Health in Coal Mines written by International Labour Office and published by . This book was released on 1986 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coalmining industry has always been considered the most hazardous of the major industries, in view of the natural conditions in which the work is carried out and the considerable difficulties involved. This code of practice has been prepared to help those responsible for improving standards of safety and health and to provide guide-lines for the drafting of safety and health regulations for the coalmining industry. It contains provisions on general safety and health measures, specific measures for work underground, road and shaft driving, coalgetting, transport, and so on, and procedures f.
