Download or read book Design Optimization in Underground Coal Systems The structural characterization of coal written by and published by . This book was released on 1981 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design optimization in underground coal systems written by Virginia Polytechnic Institute and State University. Department of Mining and Minerals Engineering and published by . This book was released on 1976 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems written by Virginia Polytechnic Institute and State University. Department of Mining and Minerals Engineering and published by . This book was released on 1978 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems A theoretical yield pillar design technique using the finite element method of stress analysis written by and published by . This book was released on 1981 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems The roof truss an analysis with applications to mine design written by and published by . This book was released on 1981 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems Modified FACESIM and COST SCHED programs written by and published by . This book was released on 1981 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems written by Christopher Haycocks and published by . This book was released on 1974 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1976 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems The RESERV COAL program written by and published by . This book was released on 1981 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy a Continuing Bibliography with Indexes written by and published by . This book was released on 1981 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Design Optimization in Underground Coal Systems written by Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Underground Mining Methods and Technology written by A.B. Szwilski and published by Elsevier. This book was released on 2012-12-02 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains high-quality papers from the principal mining research institutes of the USA, United Kingdom, India and South Africa, thus providing up-to-date coverage of underground mining and technology in the main mining areas of the world. The theme is mining in adverse conditions using state-of-the-art technology. A wide range of problems facing mining engineers is discussed, namely: thick seam working, mining under massive beds, highly productive room and pillar operations, water problems, ventilation, and electronics in longwall mining.
Download or read book Design Optimization in Underground Coal Systems written by J. Richard Lucas and published by . This book was released on 1979 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research effort is to construct a Strata Simulator that will represent the strata behavior over the seam and face area. Included in the simulator will be the effects of the longwall support. The purpose of the simulator is to systematically vary the mining and support parameters, such as rate of mining, support resistances, and profiles to achieve optimum strata control. Simulator input will comprise the physical description of the seam and surrounding strata, the geometry of the proposed layout, and the limits and characteristics of the support. Empirical relationships will be drawn from underground measurements of such data as roof deflection, support loads, and mining rates for each of the mines studies. Such approaches as the finite-element analysis will be used to modify the empirical equations developed to produce generalized relationships for the computer simulator. An alternative to conventional pillar design in room and pillar mining is the yield-pillar concept which makes it possible to raise the extraction ratio in room-and-pillar mines at great depths. At present, field data concerning yield pillars are scarce, and therefore, empirically-based design models cannot be used with confidence. Part of this research effort offers a theoretical method of yield-pillar design based on a non-linear, three-dimensioned, finite-element analysis to determine the stability of mine-panel pillars. A modification of the obliquely-installed roof bolts, the roof-truss, utilizes the concept of post-stressing so that a beneficial support effect is imposed, and it becomes very effective in preventing roof falls which could not be controlled by other means.It has not been used extensively, however, again due to the lack of design criteria and to drilling-equipment difficulties. Widespread use of the roof-truss will require that design criteria be developed.
Download or read book Annual Report written by United States. Office of Coal Research and published by . This book was released on 1972 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shaping Coal s Future Through Technology 1974 1975 written by United States. Office of Coal Research and published by . This book was released on 1975 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
