..., utilization, tunnelling energy and disc cutter wearing into account, an evaluating set was established, and each factor was weighted and their membership function was established. Thus a complete procedure of tunnelling status was formed. Based on the statistical of tunnelling data collected from Yinhanjiwei...

... the difficulties encountered in very soft and very hard rock formations all cutters were changed from disc cutter to chisel cutters and latter to V type disc cutters. Clay minerals existing within the geologic formations is also one of the main reasons clogging the cutterhead of TBM as encountered in the Suruc...

... Abstract The paper presents the results of the research in the field of mechanical rock cutting by disc cutters of the tunnel boring machines. Investigation of rock cutting mechanism was focused on the interaction of the system cutter-rock with a view to identify the dominant characteristics...

... interchange are bored by TBMs 3 and 4. In this paper we focus on the achieved performance of the 4 TBMs. We analyse their variations in terms of excavation speed and consumption of disc cutters versus the geology and geotechnical characteristics along the tunnel course. We discuss the overall production data...

... of rock mass although, at times, at the expense of an excessive wearing of the disc cutters. The distribution of pressures on the surface of contact of the disc with the rock is not uniform. The area of contact is defined as the product of the edge width of the disc by the length of the circular sector...

... to huge consumption of fuel. microwave energy disc cutter microwave macro-crack density Reservoir Characterization aperture dimension Microwave Radiation rock mass Upstream Oil & Gas temperature distribution horn antenna breakage application tunnel boring machine structural...

... excavation process except from scale effects. reservoir geomechanics disc cutter performance prediction Wellbore Design Colorado School prediction specimen structural geology Scale Rock pressure distribution cuttability rig penetration Reservoir Characterization Upstream Oil & Gas...

..., one section of the tunnel was excavated by the slurry TBM.Although risk may still occur, these experiences show that the severe wearing of the disc cutter and the sustained convergence of rock mass are to blame for the slow progress of TBM construction. 1 INTRODUCTION Due to the growing population...

... ABSTRACT: A portable linear rock cutting machine (PLCM)™ using mini discs is developed by the members of Mining Engineering Department, ITU.A groove is cut on the surface of a rock sample with a small disc cutter with constant depth of cut. Tool forces and specific energy values are recorded...