... subsidence rock mass excavation support system Dolaei tunnel Upstream Oil & Gas characteristic mechanical characteristic Sinkhole Subsidence rock mechanics isrm13 Montreal tunnel A PRACTICAL METHOD TO CONTROL THE FORMATION OF SINKHOLE SUBSIDENCE THE DOLAEI ROAD TUNNEL CASE STUDY * E...

... levels and a response modification factor; and using a limit displacement approach to calculate elastic stiffness of the selected elements of the sacrificial support system. The proposed conceptual support systems have the capability of dissipating rockburst energy while retaining sufficient...

... in comparison with other pre-support systems (e.g., ground freezing). The umbrella arch system has been employed with significant frequency around the world, yet without a complete understanding about the mechanical response of the system. As such, literature has found the temporary support system to be both...

... for a period of at least 4 years. If it was a permanent chamber the stability solution would be very similar, and would include protection of all elements of the support system from possible degrading effects. RESULTS OF GEOTECHNICAL RESEARCH AND ANALYSES General geological characteristics of the ore body...

... that support systems composed of stiff devices are often subjected to premature failure in high stress rock conditions. In the past decade, yield support devices have been employed to improve the performance of rock support systems. A rock support system usually consists of both internal and external devices...

... Upstream Oil & Gas mechanism support function support element burst-prone ground support design Reservoir Characterization displacement rock support system excavation support system metals & mining severity seismic event damage mechanism rockburst damage mechanism...

... Upstream Oil & Gas mesh Reservoir Characterization tendon rock type tunnel support operation excavation metals & mining support system installation friction anchor rock-related risk shotcrete shaft drill rig blocky ground condition tunnel application impala platinum...

... in increased seismic activity and more rockburst damage. The effectiveness of various ground support systems under dynamic loading conditions has therefore become of prime interest to LKAB for successful and safe mining at deep levels. Therefore, a series of rockburst simulations will be conducted, using...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Ground support system at Leeville underground mine Changshou Sun Newmont Mining Corp, Elko, NV, USA ABSTRACT: The Leeville underground mine has been in operation since...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Response of granite under strain controlled loading and effect of support system on behaviour of large underground cavern Rakesh Kumar GMR Consulting Services Pvt. Ltd...

... and interaction of support elements in a rockbursting environment. The design of rock support for these conditions is therefore problematic, since neither the demand imposed on the support, nor the capacity of support systems under dynamic loading, can be defined. A conventional engineering design approach...

.... Grease can also be added on the bolt to debond it, before grouting it in the sample tube using Dupont Fasloc Resin (so-called Coneloc). rock bolt dynamic testing loading curve displacement cone bolt testing apparatus cone displacement metals & mining support system momentum...

... results, could intervene with adequately changes in support system. 1 INTRODUCTION During construction of cuts in rock mass, usual method for sustaining of stability is reinforcement of the rock mass with rock bolts (Arbanas 2002, 2003). Flysch rock mass is significantly weaker than other sediment...

... immediate support system, providing a fast stabilization of the rock mass itself. Literally millions of rockbolts are installed around the world each year, and therefore appears the necessity to study these support elements carefully. Consequently, external and internal active supports were analyzed...

... though the rates are seen to be decreasing, the risks of accidents and fatalities remain unacceptably high. In the gold mines, the rates have increased over the past two years. The implications of these statistics are that there are failures of the support systems and therefore, as stated by Stacey (2003...

... technology for hanging wall support is being investigated, including the use of full column resin rockbolts and active management of hanging wall support through movement monitoring. The changes in support system are intended to improve horizon control, reduce the numbers of falls of ground and optimise...

... system behaviour Schubert rock mass LSC displacement strength Alpine Tunnel Rock mechanics application lining stress intensity support system deformation shotcrete lining ductile support method excavation tunnel ABSTRACT Geological conditions associated with alpine...

... capability of the support and reinforcement system. As part of this effort, new products. metals & mining displacement loading support element Upstream Oil & Gas dynamic support system rock mass Reservoir Characterization dynamic support rationale seismicity momentum change seismic...

... The most widely used support design criterion for rockburst-prone mines is based on work of Wagner (1984), which takes into account the kinetic and gravitational potential energy of the key blocks. The most common criterion for effective rockburst-resistant support systems is to absorb the kinetic...

... & Gas Katzenbach discontinuity Rock mechanics support system dip direction interaction contour excavation pit international symposium 625 Katzenbach, R.; Vogler, M.; Adamietz, U. The interaction of rock mass properties and the project specific boundary conditions as basis for the design...