• CDC Mining ARMPS-HWM NIOSH

    ARMPS-HWM is a modification of Analysis of Retreat Mining Pillar Stability (ARMPS) software for designing web and barrier pillars for Highwall Mining (HWM). ARMPS-HWM calculates stability factors based on estimates of the loads applied to, and the load-bearing capacities of, web and barrier pillars used in highwall mining operations.

  • CDC Mining Analysis of Highwall Mining Stability The

    Highwall mining has become a widely applied method in surface mining. It is commonly used alone or in conjunction with contour or slot mining. It provides 800 to 1,200 ft of additional recovery when, in contour mining, the economic stripping ratio is reached or, in slot mining, when surface access to a reserve is limited.

  • (PDF) Highwall Mining: Design Methodology, Safety and

    Analysis of MSHA accident and injury statistics shows that highwall mining has main-tained an admirable safety record. a ing site and some of the potential safety problems of a high wall

  • 作者: Yi Luo
  • Highwall Mining System e-library WCL

    Cat® Highwall Mining System The industry-leading Cat highwall mining system is a new, low-cost addition to traditional mining methods. The system can produce 40 000-110 000 tonnes (44,000 to 121,000 tons) of coal per month, depending on seam height. Capable of full operation with a three- to four-man crew, the Cat highwall mining system

  • Highwall Mining Taylor & Francis Group

    Jul 06, 2017· This comprehensive technical book on highwall mining covers theory and pract coupled with practical examples and design aspects. It contains eight extensive chapters eorating broad-spectrum functionalities of highwall mining and its operational aspects, covering world scenario, economic potential, methods of coal extraction, design methodology including empirical web pillar

  • Cited by: 1
  • Highwall mining a new approach in india

    Jun 08, 2014· Ground Control Analysis of Highwall Mining Ground control analysis is the very critical pre-mining activity for High wall mining. This technology is new for India, but very popular in USA and Australia. Till now USA has completed around 20 High wall mining projects with few cases of highwall collapses due to webs failure.

  • Design of Auger highwall mining SlideShare

    Jan 07, 2018· The secondary mining technology for extracting the remaining coal from the open pit mining methods. Cited as: Boeut, S., & Loawattanabandit, P. " Design of Auger Highwall Mining: A case study at Mae Tan Coal Mine, Thailand", in Proc. ASEAN++2016 Towards Geo-resources Education in ASEAN Economic Community, 2016, pp. 304-321.

  • HIGHWALL STABILITY ANALYSIS ON A PC 1

    Additional Key Words: Highwall stability, Surface mining 1 Paper presented at the 1990 Mining and Reclamation Conference and Exhibition, Charleston, West Virginia, April 23‐ 26, 1990. 2 P. M. Lin, D. Dutta and S. S. Peng are Research Associate, Graduate Student and Charles T. Holland Professor and

  • Ground Control for Highwall Miining

    years at a highwall mining operation was due to highwall col­ lapse. have also been numerous near-misses, several of which have involved extensive damage to equipment. In the central Appalachians, where the majority of highwall mining occurs in the U.S.,hillseams are the most prominent geologic structures that affect highwall stability.

  • Application of highwall mining system in weak geological

    Apr 29, 2016· Highwall mining systems can sometimes be the final mining method used in open cut mines, or it can serve as a means of transition, with low capital cost, from surface mining to underground mining. From the results of a series of oratory tests and numerical analyses, stability of openings/pillars in the auger mining system is higher than that

  • Coal Mining and the Highwall Method OilP

    A detailed look at coal mining and the highwall method. When the last economic cut has been made with a surface mining operation, the coal seam

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  • Numerical back-analysis of highwall instability in an open

    the progression of mining leading from a stable to an unstable state were used in the numerical back-analysis. The following surfaces were modelled: • 2015-12-01 topography surface: Pit floor at 686 m elevation in the area of the highwall instability.

  • Highwall mining of thick, steeply dipping coal–a case

    Sep 01, 2019· Analysis methods. Highwall mining pillar design is a direct function of coal strength, opening height, opening width, and depth of cover. These inputs are used to create design curves unique to each mine’s geologic environment to specify the web and barrier pillar widths necessary to achieve the desired safety factor (SF). Agapito Associates

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  • Stability Evaluation of Highwall Slope in an Opencast Coal

    The monitoring, analysis and stabilization of slopes is an integral part of the opencast and high wall mining operations during the entire life cycle of the project. Analyses must be based upon a model that accurately represents site sub-surface conditions, ground behavior, and applied loads. Consequences of failure Acceptances Criteria

  • Analysis Of Practical Ground Control Issues In Highwall Mining

    Highwall mining is an important coal mining method. Upwards of 60 highwall miners are presently in operation, and they may account for approximately 4% of total U.S. coal production. A review of the Mine Safety and Health Administration (MSHA) accident data over the 20 year period from 1983 to 2002 identified 9 fatalities attributable to auger

  • Paper: Numerical back-analysis of highwall instability in

    Abstract: In this , a numerical modelling study to back analyse a highwall instability event in an open pit has been completed. The unstable highwall was over 125 m high and 200 m wide. The overall slope angle was 44°. The highwall instability was detected by slope stability radar and resulted in a multi-bench failure consisting of approximately 3,000,000 t of rock.

  • A Frame for Geotechnical Hazard Analysis in Highwall

    Jan 01, 2017· Such analysis would provide more insight into designing highwall mining layouts and in predicting possible impending highwall failures, and indirectly facilitates reducing machine downtime for better management of highwall mining operations. © 2017 The Authors.

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  • University of Wollongong Research Online

    ANALYSIS OFUNSUPPORTED ROOFSPANS HIGHWALL MINING AT MOURA COALMINE. John Hoelle. 1. ABSTRACT: Highwall Mining has been conducted at Moura Coal Mine since 1993. During that time. period. four different highwall-miningsystems have been used. One common constraint. with. three of the systems was that all drives were 3.6 metres wide and they

  • Effect of highwall parameters on the open pit operation

    The article addresses the open pit mining of lightly pitching coal below different surface topography. Based on the analysis of the effect exerted by highwall angle on the current stripping ratio, suggestions are made on possible improvement in the open pit mine performance and extension of its life by changing the slope angle of the open pit highwall.

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  • Design Programs for Highwall Mining Operations

    Highwall mining is a hybrid of surface mining and underground mining methods, and is often the only feasible method to recover the coal reserves in the central Appalachian coalfields due to the steep terrain and the closely spaced multiple thin coal seams.

  • Slope stability analysis of open pit highwall mining

    In designing Highwall slopes for an open pit, the design must include Highwall mining excavations, otherwise, near critical failure slopes could become critical and fail with Highwall excavations. In authors’ knowledge, this is the first attempt at exploring the effect of Highwall mining

  • Theoretical Analysis of Damaged Width & Instability

    To improve the resources’ recovery ratio and the economic benefits of open-pit mines, the development of highwall mining is used to exploit residual coal. The design of rib pillar, formed by excavation and mining activities in intact coal seams, is crucial to the overall stability and safety of the highwall mining operations. This focuses on the damage caused to rib pillars by the

  • Indian case studies Highwall Mining Taylor & Francis Group

    Highwall mining is seen as a promising method in India to extend the life of open pit coal mines by extracting locked-up coal from multiple seams exposed at the batters and final highwall slope. In this chapter detailed design methodology adopted for all the initial highwall mining projects viz. (i) Ramagundam Opencast Project-II and (ii

  • Feasibility of high recovery highwall mining equipment

    @article{osti_6859514, title = {Feasibility of high recovery highwall mining equipment. Final report}, author = {}, abstractNote = {Three equipment systems exhibited significant promise: the RSV Miner, a surface longwall using standard underground equipment, and the variable angle auger. Other equipment systems showing considerable merit were the surface shortwall, and the two extended depth