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Keywords: Efficiency
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-148
..., the authors originally designed the vertical/horizontal boreholes to enclose the storage caverns and developed an independent water supply pipe sys-tem for the water curtain boreholes. Furthermore, the authors developed the efficiency test method to evaluate each water curtain borehole individually...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-061
... as primary support. This improves the efficiencies of the mining cycle which is a benefit to fully mechanised shallow bord and pillar operations in the Bushveld Igneous Complex. 1 INTRODUCTION An increase in shallow hard rock mines on the Eastern Bushveld Limb has increased the demand for active support...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-196
... new jobs initiating new jobs High efficiency Average efficiency Low cost of labor High cost of labor High investment cost Low investment cost Summary Cost-effective for tunnels of Average cost-effective for more than 3 km tunnels of up to 3 km or more Potential advances: Potential advances: automation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-146
... zone increases significantly efficiency of stimulation of a well. It is carried out by directed unloading of the reservoir on the basis of knowledge of the deformation, strength and filtration properties of specific field rocks. Examination of rock mechanical properties is made by laboratory tests...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-118
... Abstract Dynamic tests using the Split Hopkinson Pressure Bar test (SHPB) were conducted on granite specimens in order to study the efficiency of the drill and blast method and the environmental impact of the excavation of a tunnel in urban areas. The tests were performed at different strain...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-021
...-mechanism creates paradoxical effect providing the formation of new faults in intact rock mass at shear stress levels significantly below the frictional strength. This indicates that the lower limit of lithospheric strength is not restricted by the frictional strength. The varying efficiency...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-044
..., the effects of the rock brittleness on the efficiency of diamond beads are examined by investigating cutting rate and unit wear values. Until now, the effect of the rock brittleness on diamond wire cutting has not been put forward by any researchers. Therefore, it is aimed to correlate the relationships...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-106
... tunneling in hard rock were overcome. ground transportation hard rock Efficiency replacement structural geology cutter segment dislocation rail transportation long-distance shield water leakage cutting tool Reservoir Characterization key technology segment damage tunnel shield machine...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-118
... scheme in which only necessary data is needed to gather and scatter is submitted to make EBE method available for distributedmemory parallel computers. This method could dramatically reduce data exchange and consequently improve efficiency of parallel computing. At the same time, it is very easy to reach...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-002
... intends to present how modelling can be used for the analysis of the functioning and the performances of both systems and in order to help engineering in the design of efficient devices. 1. NET FENCES - THE ASM NETS: A COMPLEX STRUCTURE 1.1 Introduction Rock fall restraining nets are specific structures...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-052
... Reservoir Characterization optimum penetration depth conical bit loading Engineering boundary condition impact pressure Completion Installation and Operations Efficiency pressure wave fracture version 4 shear stress dynamic bit impact Upstream Oil & Gas stress wave profile...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-092
...- terogenitiit des Gesteins die Festigkeit abnimmt. 1 INTRODUCTION The efficiency of rock drilling is determined by the processes of rock fragmentation to a large extent. The fragmentation of rock depends on the conditi- ons of loading as well as on the rock properties (in particular, strength). Any data about...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-079
... ABSTRACT: Verification of the efficiency of operational and technical measures in a problem field of rockbursts, hydrogeology, engineering geology, and supports in long mine workings and impacts on surface and underground structures is performed on equivalent models in the laboratory...

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