Download or read book Thick seam Mining in the Western United States geological Considerations written by Donna L. Boreck and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Longwall Thick Seam Mining written by Ajoy K. Ghose and published by . This book was released on 1988 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Longwall Thick Seam Mining written by Raja V. Ramani and published by Taylor & Francis. This book was released on 1988 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three Potential Longwall Mining Methods for Thick Coal Seams in the Western United States written by Richard H. Oitto and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thick Seam Mining Problems and Issues written by T. N. Singh and published by . This book was released on 1992 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multislice Mining for Thick Western Coal Seams written by T. D. Hackett and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Longwall Thick Seam Mining written by Ajoy K. Ghose and published by Taylor & Francis. This book was released on 1988-01 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Indo-US seminar on Longwall Mining Systems for Thick Seam Mining--Assessment of Progress and Needs, held at Indian School of Mines, Dhanbad, January 1986. No index; acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Coal written by National Research Council and published by National Academies Press. This book was released on 2007-12-21 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal will continue to provide a major portion of energy requirements in the United States for at least the next several decades. It is imperative that accurate information describing the amount, location, and quality of the coal resources and reserves be available to fulfill energy needs. It is also important that the United States extract its coal resources efficiently, safely, and in an environmentally responsible manner. A renewed focus on federal support for coal-related research, coordinated across agencies and with the active participation of the states and industrial sector, is a critical element for each of these requirements. Coal focuses on the research and development needs and priorities in the areas of coal resource and reserve assessments, coal mining and processing, transportation of coal and coal products, and coal utilization.

Download or read book Design Practices for Multiple seam Longwall Mines written by Gregory J. Chekan and published by . This book was released on 1993 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mining of Thick Flat Coal Seams by a Longwall Bottom Slice with Caving and Drawing written by K. Barron and published by Mines Branch, Department of Energy, Mines and Resources. This book was released on 1974 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thick Seam Mining by Underground Methods written by and published by . This book was released on 1976 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of U S underground thin seam mining potential written by United States. Division of Solid Fuels Mining and Preparation and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of the Single Pass Thick Seam Longwall Mining Method written by Roger F. J. Adam and published by . This book was released on 1982 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rock Mass Response to Longwall Mining of a Thick Coal Seam Utilizing Shield type Supports written by Collin L. Stewart and published by . This book was released on 1977 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Papers Presented at the Symposium on Thick Seam Mining by Underground Methods written by Australasian Institute of Mining and Metallurgy. Central Queensland Branch and published by . This book was released on 1976 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Longwall Mining written by and published by DIANE Publishing. This book was released on 1995 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes longwall mining and compares it with other underground mining methods. Describes major changes in the geologic, technological, and operating characteristics of longwall mining over the past decade. Shows how changes lead to dramatic improvements in longwall mining productivity. References for technology and historical development. Charts and tables.

Download or read book Mine Entry System Longwall Top Slicing Thick Coal Seams written by D'Appolonia Consulting Engineers and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conceptual designs of entry systems for mining thick coal seams by the longwall top-slicing method were investigated. Based on a 100-foot thick seam, covering four square miles and dipping at 10 degrees, an entry concept was designed using ten slices and present-day equipment. Using five main entries driven downdip and located in rock beneath a central barrier pillar on the property centerline, the design utilizes four longwall units at full production for a rate of 2.62 million tons per year. Laterals and inclines are driven off the mains to serve single entry panels in each slice. Face lengths are typically 570 feet in length and panels are staggered to provide a smooth subsidence contour. An all-retreat layout is used with longwall operations retreating from the property boundaries to the central barrier pillar on strike. The entry concept is described in detail relative to the geometric layout, panel sequencing, production and development equipment, material handling requirements and ventilation requirements. Economic analyses indicate the method is probably not feasible at present given a required selling price of $16.33 per ton, exclusive of crushing, cleaning, and transportation costs, for a 15% return on investment. However, increased demand for coal and associated higher prices will make the method feasible in the near future. Regulatory constraints on the conceptual entry system were also investigated. For the most part the design concept is in compliance with existing regulations or variances which have been granted previously. One notable exception is the absence of bleeder ventilation systems so as to minimize the leakage of air across the gob and reduce the spontaneous combustion potential.