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18篇 您的检索式:作者名="Christopher Newman"
    题名 作者 年代 出处 被引量
1Assessment of potential impacts to surface and subsurface water bodies due to longwall mining显示文摘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.Christopher Newman Zacharias Agioutantis Gabriel Boede Jimenez Leon 2017International Journal of Mining Science and Technology2017,27,1:6
2Development of a new algorithm for implementing the edge effect offset for subsidence calculations显示文摘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 methods.From 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 offset.The 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 area.The objective of this paper is to describe the methods implemented in updating the edge effect offset algorithm within SDPS.Using 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 geometries.Given 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 distance.Surface deformations are then calculated using this adjusted panel geometry.The Matlab program was utilized for development and testing of the new edge effect offset algorithm.After 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.Joshua Hescock Christopher Newman Zach Agioutantis 2018International Journal of Mining Science and Technology2018,28,1:4
3Development of a multiple level underground limestone mine from geology through mine planning显示文摘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 design.The components are interdependent and must function cohesively to ensure a profitable underground mining operation.To optimize reserve recovery,mine planning should begin from the lowest level and progress up.This limits any misjudgments or oversights of a given level affecting the underlying levels and ensures the ability to maximize recovery from each level.Mine planning should start with the exploration and characterization of the geologic setting.Once 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 modeling.The multiple level mine design process and decisions are presented through a case history example.The 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.Christopher Newman David Newman Robert Dupuy 2020International Journal of Mining Science and Technology2020,30,1:3
4Numerical analysis for the prediction of bump prone conditions:A southern Appalachian pillar coal bump case study显示文摘Two miners were fatally injured when a pillar bump occurred during retreat mining in a southern West Virginia coal mine.The mine was operating in the Eagle seam with overmining in the No.2 Gas and Powellton seams.A coal bump is defined as a sudden and violent failure of coal caused by the release of stored strain energy in the pillar.While significant strides have been made by academia,industry,and regulatory agencies to better understand bump conditions and mitigation techniques,coal bumps represent a long standing,highly site-specific engineering problem in which the exact failure mechanism is not clearly understood.In this case history,a cut-by-cut analysis of retreat mining operations was conducted on the 4 East Main leading up to the pillar bump event.Numerical input parameters were derived from site-specific geologic information and mine geometry for the analysis of pillar stress conditions and energy release using LaModel.An overview of stress conditions in the panel was presented including a precursor event that occurred two crosscuts inby the bump site.The methodology presented in the paper for the evaluation of the fatal bump event can be used for the identification of bump prone conditions prior to development and retreat of a mining area.Christopher Newman David Newman 2021International Journal of Mining Science and Technology2021,31,1:2
5Operative Findings, Early Complications, and Long-Term Survival in 456 Patients With Pseudomyxoma Peritonei Syndrome of Appendiceal Origin显示文摘Haney Youssef Christopher Newman Kandiah Chandrakumaran Faheez Mohamed Tom D. Cecil Brendan J. Moran 2011Diseases of the Colon & Rectum2011,,:1
6EUS-guided tattooing before laparoscopic distal pancreatic resection (with video)显示文摘Anne Marie Lennon Naeem Newman Martin A. Makary Barish H. Edil Eun Ji Shin Mouen A. Khashab Ralph H. Hruban Christopher L. Wolfgang Richard D. Schulick Samuel Giday Marcia I. Canto 2010Gastrointestinal Endoscopy2010,,5:1
7Modeling the ultraviolet photedegredation of rigid polyurethane foams显示文摘Christopher R Newman D F 2001Industrial and Engineering Chemistry Research2001,40,15:1
8First international reference preparation for individual proteins in urine显示文摘Christopher P. Price David J. Newman Sorin Blirup-Jensen Walter G. Guder Anders Grubb Yoshi Itoh Myron Johnson Manfred Lammers Simon Packer Daniel Seymour 1998Clinical Biochemistry1998,,6:1
9VERNAUZATION1 Modulates Root System Architecture in Wheat and Barley显示文摘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 2018Molecular Plant2018,11,1:1
10Chemical flame heights 显示文摘Newman Jeffrey S Wieczorek Christopher J 2004Fire Safety Journal2004,39,5:1
11Impact of Weight Loss on Physical Function with Changes in Strength, Muscle Mass, and Muscle Fat Infiltration in Overweight to Moderately Obese Older Adults: A Randomized Clinical Trial显示文摘Adam J. Santanasto Nancy W. Glynn Mark A. Newman Christopher A. Taylor Maria Mori Brooks Bret H. Goodpaster Anne B. Newman Robert J. Ross 2010Journal of Obesity2010,,:1
12Chemical flame height显示文摘Newman Jeffrey S Wicczorek Christopher J 2004Fire Satry Journal2004,39,5:1
13Ultrasound-enhanced transgene expression in vascular cells is not dependent upon cavitation-induced free radicals显示文摘Allan Lawrie Axel F. Brisken Sheila E. Francis David Wyllie Endre Kiss-Toth Eva E. Qwarnstrom Stephen K. Dower David C. Crossman Christopher M. Newman 2003Ultrasound in Medicine & Biology2003,,10:1
14Attenuation of vascular smooth muscle cell proliferation by 1-cyclohexyl-3-dodecyl urea is independent of soluble epoxide hydrolase inhibition显示文摘Benjamin B Davis Christophe Morisseau John W Newman 2006J Pharmacol Exp Ther2006,316,2:1
15Transcript profiling of fructan biosynthetic pathway genes reveals association of a specific fructosyltransferase isoform with the high sugar trait in Lolium perenne显示文摘Susanne Rasmussen Anthony J. Parsons Hong Xue Qianhe Liu Christopher S. Jones Geraldine D. Ryan Jonathan A. Newman 2013Journal of Plant Physiology2013,,:1
16Development of a web-platform for mining applications显示文摘‘‘Web ground control'(web GC) provides users with instantaneous access to mine design applications anywhere, at any time, through a web browser.Utilizing 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 systems.Currently, 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 fingertips.The 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 interface.Based 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.Christopher Newman Zach Agioutantis Nathaniel Schaefer 2018International Journal of Mining Science and Technology2018,28,1:1
17Introduction to organic thin film transistors and design of n-Channel organic Semiconductors显示文摘Newman Christopher R Frisbie C Daniel da Silva Filho Demetrio A 2004Chem Mater2004,16,:1
18A study of sub- seasonal predictability 显示文摘Newman M Prashant D S Christopher R 2003Monthly Weather Review2003,131,:1
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