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 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 Underground longwall ground control simulator written by and published by . This book was released on 1981 with total page 268 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 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 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 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 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 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 written by J. Richard Lucas and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems The prediction of mining subsidence and related parameters over longwall mining operations written by and published by . This book was released on 1981 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Optimization in Underground Coal Systems LHDSIM a load haul dump simulator for room and pillar mining systems written by and published by . This book was released on 1981 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Design Optimization in Underground Coal Systems The CONTUR program written by Virginia Polytechnic Institute and State University. Dept. of Mining and Minerals Engineering and published by . This book was released on 1981 with total page 76 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 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:
