behavior of shield support in longwall mining

behavior of shield support in longwall mining

behavior of shield support in longwall mining
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Behavior of Shield Support in Longwall Mining 16/10/2016· This study is focused on behavior of shield support in longwall mining and shall concentrat

behavior of shield support in longwall mining

  • Behavior of Shield Support in Longwall Mining

    16/10/2016· This study is focused on behavior of shield support in longwall mining and shall concentrate to evaluate on the following areas: 1 To study the shield behavior in a underground longwall coal mine 2 Simulation of the field conditions in FLAC 50 software 3 Interpretation of the results generated from simulating the models in FLAC 50 to determine the shield behavior 4 ToThe success of longwall mining depends to a large extent on the capacity and design of shield support Throughout the history of longwall mining, shield support design has been a critical issue to the success of mining operation To make mining operations safe and sound the study of behavior of shield support and its design is very essentialBEHAVIOR OF SHIELD SUPPORT IN LONGWALL MININGThis is to certify that the thesis entitled, “ BEHAVIOR OF SHIELD SUPPORT IN LONGWALL MINING ” submitted by Mr Chandan Kumar, 109MN0392, in partial fulfillment of the requirement for the award of Bachelor of Technology Degree in Mining Engineering at the National Institute of Technology, Rourkela (Deemed University) is a record of original research work carried out under my supervisionBehavior of Shield Support in Longwall Mining | Nature

  • Longwall Mining an overview | ScienceDirect Topics

    longwall mining Mining a mining method in which very long rectangular blocks of coal are defined during the development stage of the mine and then extracted in a single continuous operation by an automated cutting head moving parallel to the coal face When the coal is cut, the working area is protected by a movable, powered roof support system As the face progresses, the immediate roofPeng, SS and Chiang, HS (1982c)Support Resistance and Roof Behavior of a Longwall Face with 2leg Lemniscate Shields, Department of Mining Engineering, West Virginia University Google Scholar Peng, SS and Chiang, HS (1983) Longwall Ground Control — US Experiences, Journal of Mines, Metals and Fuels , ‘Update on Longwall Mining — Evolving Trends’, pp 397–408Support capacity and roof behaviour at longwall faces withKumar, Chandan (2014) Behaviour of Shield Support in Longwall Mining BTech thesis Preview PDF 2894Kb: Abstract Field observation were conducted on behaviour of chock shield support of capacity 800T during extraction of longwall panel no 3D2 at 250m depth and 150m face length of GDK 10A Incline, Singareni Collieries Company Limited Chock leg pressures and leg closures were regularlyBehaviour of Shield Support in Longwall Mining ethesis

  • CDC Mining Examination of Design and Operation

    The success of longwall mining can largely be traced to the development of powered roof support systems The most significant improvement in powered support design has been the shield support, which improved kinematic stability and promoted the application of longwall mining in difficulttocontrol caving conditions where chock and frame supports were inadequateThis is to certify that the thesis entitled, “ BEHAVIOR OF SHIELD SUPPORT IN LONGWALL MINING ” submitted by Mr Chandan Kumar, 109MN0392, in partial fulfillment of the requirement for the award of Bachelor of Technology Degree in Mining Engineering at the National Institute of Technology, Rourkela (Deemed University) is a record of original research work carried out under my supervisionBehavior of Shield Support in Longwall Mining | NatureKumar, Chandan (2014) Behaviour of Shield Support in Longwall Mining BTech thesis Preview PDF 2894Kb: Abstract Field observation were conducted on behaviour of chock shield support of capacity 800T during extraction of longwall panel no 3D2 at 250m depth and 150m face length of GDK 10A Incline, Singareni Collieries Company Limited Chock leg pressures and leg closures were regularlyBehaviour of Shield Support in Longwall Mining ethesis

  • Mining Engineering Archives Final Year Thesis

    16/10/2016· Behavior of Shield Support in Longwall Mining Abstract:Field observation have been carried out on behaviour of chock guard aid of capacity 800T throughout extraction of longwall panel no 3D2 at 250 m intensity and 150 m face duration of GDK 10A Incline, Singareni Collieries employer limited Chock leg pressures and leg closures were often monitored at different stages of extraction ofThe shieldroof interaction as mining proceeds in longwall panels remains unclear, hindering the further increase of longwall productivity To uncover the mechanisms of shieldroof interactionPerformance of Chock Shield Supports in Longwall MiningThe success of longwall mining can largely be traced to the development of powered roof support systems The most significant improvement in powered support design has been the shield support, which improved kinematic stability and promoted the application of longwall mining in difficulttocontrol caving conditions where chock and frame supports were inadequateCDC Mining Examination of Design and Operation

  • Shield Support Monitoring System – operation during the

    In the Polish mining industry, mechanised shield support is rarely monitored, unlike other machines in the longwall complex The effectiveness and safety of mining operations depend on shield support Aspects related to the cooperation between mechanised shield support and rock mass, which affect the proper maintenance of the roof, have a significant impact on the effectiveness and safety ofMobile Mining Support, Inc, Peach Creek, WV ABSTRACT Longwall mining has gained the reputation as being the safest extraction method in underground coal mines However, one of the most difficult tasks associated with longwall mining is moving the face once a panel is completed Based on Mine Safety and Health Administration (MSHA) fatality reports since 1996, longwall face recoveryLongwall Shield Recovery Using Mobile Roof SupportsLongwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 06–10 m (2 ft 0 in–3 ft 3 in) thick) The longwall panel (the block of coal that is being mined) is typically 3–4 km (19–25 mi) long and 250–400 m (820–1,310 ft) wide History Plan of longwall mine before conveyors – the hoist is at the center of the centralLongwall mining Wikipedia

  • evaluation of longwall face stability in thick coal seams

    31/01/2019· The stability of the roof and longwall face in the open face area should be studied from the perspective of shield–strata interaction, which was assessed utilizing a coalsupport deflection model and a physical modelling study in this paper, with a consideration of shield stiffness and yielding events of the longwall shield The impact of shield stiffness/capacity on roof and faceJoy powered roof supports, for highcapacity longwall applications, are custom designed to meet your exacting cycle and operating requirements: Ratings up to 1,750 tonnes ; Widths of 15, 175, and 205 meters; Heights from 08 to 78 meters; Leg bore sizes ranging from 125 to 480 mm; Industry leader Over 60 years of experience in designing and manufacturing powered roof supports ; ISO 9001Joy Powered Roof Support Underground Mining |This is to certify that the thesis entitled, “ BEHAVIOR OF SHIELD SUPPORT IN LONGWALL MINING ” submitted by Mr Chandan Kumar, 109MN0392, in partial fulfillment of the requirement for the award of Bachelor of Technology Degree in Mining Engineering at the National Institute of Technology, Rourkela (Deemed University) is a record of original research work carried out under my supervisionBehavior of Shield Support in Longwall Mining | Nature

  • Behaviour of Shield Support in Longwall Mining | Nature

    Behaviour of Shield Support in Longwall Mining Free download as PDF File (pdf), Text File (txt) or read online for free observation were conducted on behaviour of chock shield support of capacity 800T during extraction of longwall panel no 3D2 at 250m depth and 150m face length of GDK 10A Incline, Singareni Collieries Company LimitedThe shieldroof interaction as mining proceeds in longwall panels remains unclear, hindering the further increase of longwall productivity To uncover the mechanisms of shieldroof interaction, using our selfdeveloped Status of Shield and Roof IntelliSense (SSRI) system, we investigated the effects of idle time, retreating rate, setting pressure, yielding, and shearer’s cutting, asShieldRoof Interaction in Longwall Panels: Insights fromIn the Polish mining industry, mechanised shield support is rarely monitored, unlike other machines in the longwall complex The effectiveness and safety of mining operations depend on shield support Aspects related to the cooperation between mechanised shield support and rock mass, which affect the proper maintenance of the roof, have a significant impact on the effectiveness and safety ofShield Support Monitoring System – operation during the

  • Study about the Dynamic Influences of Longwall Mining

    BiDirectional Shield Recovery in a Wide Face Longwall Move Evaluation of Support and Ground Response as Longwall Face A Longwall Shield Recovery Using Mobile Roof Supports Moranbah North Tests the Critical Caving Theories Every Geot The Roof Behavior of a Longwall Tailgate Under Massive Sand A Methodology for Fault PreConsolidation prior to01/01/2007· Shield recovery in a longwall move is normally conducted from tailgate to headgate However, if the face is wide and the immediate roof is weak, difficult conditions with considerable roof sag, excessive shield load, and local roof falls could occur as the shield recovery proceeds to the middle of the face, causing delays in shield recovery The situation could be aggravated when a predrivenBiDirectional Shield Recovery in a Wide Face LongwallIt is concluded that block modeling is a useful tool for correlating measured support pressure histories with expected modes of strata behavior in the roof, with potential for predicting shield behavior in new geologic environments Related Projects BHP San Juan Mine Underground Instrumentation—Farmington, New Mexico Coal Longwall Mining Project Summaries:A Study of Periodic Weighting of Longwall Supports

  • Longwall shield design: is bigger better? (Journal Article

    This article evaluates the bigger is better design philosophy for longwall shields The conventional support design approach based on simplistic models of supporting the full dead weight detached rock masses is replaced by a ground reaction design approach Here, the goal is to match the support characteristics to the ground response, and not to try and overpower the ground forces with someCaterpillar is the world leader in longwall roof support technology In the early 1970s, demanding mining conditions in German coal mines set the stage for extensive R&D in roof support technology Steeply inclined coal seams both thick and thin, weak roofs and massive sandstone roofs, soft floors, and geological faults called for a high degree of customization The resulting expertise hasLongwall Mining EquipmentJoy complete longwall systems represent the ultimate solution for highproduction longwall mining Joy incorporates bestinbreed shearers, roof supports, face conveyors, stageloaders, crushers, and mobile belt tail pieces to deliver a complete longwall system that is in a class of its own Output productivity of this integrated system simply cannot be matched by integration of standaloneLongwall Systems Underground Mining | Komatsu