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Development of a multiple level underground limestone mine from geology through mine planning

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International Journal of Mining Science and Technology 2020年第1期30卷 63-67页

作者： christopher newman David newman Robert Dupuy Appalachian Mining&Engineering Inc.LexingtonKYUSA Rogers Group Inc.NashvilleTNUSA

The development of a multiple level underground mine is a complex task in which geology,engineering,ground control,and unit operations are integrated into a single mine *** components are interdependent and must function cohesively to ensure a profitable underground mining *** optimize reserve recovery,mine planning should begin from the lowest level and progress *** limits any misjudgments or oversights of a given level affecting the underlying levels and ensures the ability to maximize recovery from each *** planning should start with the exploration and characterization of the geologic *** the reserve geology and quality is well understood,then mine planning can begin with respect to the following:(1)orientation of mine works with respect to horizontal stress;(2)access to the reserve;(3)determination of opening widths;(4)selection of back,floor horizons and pillar centers;(5)selection of development and secondary mining heights;(6)appropriate inter-burden thicknesses;and(7)examining the stability of the multiple level mine through numerical *** multiple level mine design process and decisions are presented through a case history *** theme is that there is one opportunity to"get it right"and many chances to overlook a small aspect within the design that will plague the mine throughout all levels and through the entirety of its operating life.

关键词： Limestone Mine planning Geology Multiple level Rock mechanics

Development of a new algorithm for implementing the edge effect offset for subsidence calculations

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International Journal of Mining Science and Technology 2018年第1期28卷 61-66页

作者： Joshua Hescock christopher newman Zach Agioutantis Department of Mining Engineering University of Kentucky

The surface deformation prediction system(SDPS) program has been developed as an engineering tool for the calculation of subsidence deformation indices through the implementation of various prediction *** basic user-defined input parameters, SDPS can determine subsidence indices, such as mining induced displacements, strains, tilt, etc., at any elevation between the seam and the horizontal or varying surface topography.A fundamental parameter in obtaining reliable ground deformation results is the determination of the edge effect *** value assigned to the edge effect offset corresponds to a virtual offsetting of boundary lines delineating the extracted panel to allow for roof cantilevering over the mined-out *** objective of this paper is to describe the methods implemented in updating the edge effect offset algorithm within *** proven geometric equations, the newly developed algorithm provides a more robust calculation of the offset boundary of the extracted panel for simplistic as well as more complex mining *** that an extracted panel is represented by a closed polyline, the new edge offset algorithm calculates a polyline offset into the extracted panel with respect to the user defined edge effect offset *** deformations are then calculated using this adjusted panel *** Matlab program was utilized for development and testing of the new edge effect offset *** completing rigorous testing regimes, the new offset algorithm will be integrated into SDPS further increasing the speed and reliability of the program resulting in a retrospective increase in capability and flexibility.

关键词： Subsidence Coal mining Influence function Edge effect

Development of a web-platform for mining applications

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International Journal of Mining Science and Technology 2018年第1期28卷 95-99页

作者： christopher newman Zach Agioutantis Nathaniel Schaefer Department of Mining Engineering University of Kentucky

‘‘Web ground control"(web GC) provides users with instantaneous access to mine design applications anywhere, at any time, through a web *** a web-based multiple-tier architecture, users are able to easily access ground control designs, perform on-demand calculations in the field, as well as facilitate project collaborations across multiple users, devices, and operating ***, the web GC platform contains five ground control related design applications previously developed and distributed by the US National Institute of Occupational Safety and Health(NIOSH), that is, analysis of roof bolt stability(ARBS), analysis of longwall pillar stability(ALPS), analysis of retreat mining stability(ARMPS), analysis of retreat mining stability–highwall mining(ARMPS-HWM), and analysis of horizontal stress in mining(AHSM).With respect to design decisions made by the web GC development team, the web GC platform will be able to further integrate future mine design applications providing the mining industry with one of a kind umbrella suite of ground control related software available at ones *** following paper provides a detailed overview on the current state of the web GC platform with discussions ranging from back-end database development and design to the front-end user-platform *** on current progress in platform development as well as beta testing results, the web GC platform is scheduled for release in the fall of 2018.

关键词： Ground control Stability Web application Cloud computing

Assessment of potential impacts to surface and subsurface water bodies due to longwall mining

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International Journal of Mining Science and Technology 2017年第1期27卷 57-64页

作者： christopher newman Zacharias Agioutantis Gabriel Boede Jimenez Leon Department of Mining Engineering University of KentuckyLexingtonKY 40506USA

Ground movements due to longwall mining operations have the potential to damage the hydrological balance within as well as outside the mine permit area in the form of increased surface ponding and changes to hydrogeological properties. Recently, the Office of Surface Mining, Reclamation and Enforcement(OSMRE) in the USA, has completed a public comment period on a newly proposed rule for the protection of streams and groundwater from adverse impacts of surface and underground mining operations(80 FR 44435). With increased community and regulatory focus on mining operations and their potential to adversely affect streams and groundwater, now there is a greater need for better prediction of the possible effects mining has on both surface and subsurface bodies of water. With mining induced stress and strain within the overburden correlated to changes in the hydrogeological properties of rock and soil, this paper investigates the evaluation of the hydrogeological system within the vicinity of an underground mining operation based on strain values calculated through a surface deformation prediction model. Through accurate modeling of the pre- and post-mining hydrogeological system, industry personnel can better depict mining induced effects on surface and subsurface bodies of water aiding in the optimization of underground extraction sequences while maintaining the integrity of water resources.

关键词： Streams Aquifers Ground strain Coal mining

VERNAUZATION1 Modulates Root System Architecture in Wheat and Barley

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Molecular Plant 2018年第1期11卷 226-229页

作者： Kai P. Voss-Fels Hannah Robinson Stephen R. Mudge Cecile Richard Saul newman Benjamin Wittkop Andreas Stahl Wolfgang Friedt Matthias Frisch lulian Gabur Anika Miller-Cooper Bradley C. Campbell Alison Kelly Glen Fox Jack christopher Mandy christopher Karine Chenu Jerome Franckowiak Emma S. Mace Andrew K. Borrell Howard Eagles David R. Jordan Jose R. Botella Graeme Hammer lan D. Godwin Ben Trevaskis Rod J. Snowdon Lee T. Hickey Department of Plant Breeding IFZ Research Centre for Biosystems Land Use and Nutrition Justus Uebig University Heinrich-Buff-Ring 26-32 35392 Giessen Germany Queensland Alliance for Agriculture and Food Innovation The University of Queensland St Lucia QLD 4072 Australia School of Agriculture and Food Sciences The University of Queensland Brisbane QLD 4072 Australia CSIRO Agriculture Canberra ACT 2601 Australia Department of Biometry and Population Genetics IFZ Research Centre for Biosystems Land Use and Nutrition Justus Liebig University Heinrich-Buff-Ring 26-32 35392 Giessen Germany Department of Agriculture and Fisheries Leslie Research FacilRy Toowoomba QLD 4350 Australia Queensland Alliance for Agriculture and Food Innovation The University of Queensland roowoomba QLD 4350 Australia Department of Agronomy and Plant Genetics University of Minnesota St Paul MN USA Department of Agriculture and Fisheries Hermitage Research Facility Warwick QLD 4370 Australia Queensland Alliance for Agriculture and Food Innovation Hermitage Research Facility The University of Queensland Warwick QLD 4370 Australia These authors contributed equally to this article.

Dear Editor Roots play a key role in plant growth regulation. It is well described that the below-ground plant architecture has a significant impact on plant performance under abiotic constraints and maintains stabili...

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