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Cost analysis of mine roadways driven by drilling and blasting method and a roadheader
Published in Daniele Peila, Giulia Viggiani, Tarcisio Celestino, Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art, 2019
It is clear that the advance rate of a roadheader is higher than conventional method. As pointed out above, the calculations were based on average advance rate of 70 m in one month which cannot be validated within the acceptable ranges for a roadheader. This low value increases the running costs. The reason of higher costs of driving roadheader is that the machine has installed underground recently and the crew does not have enough experience to operate it. In order to maximize productivity and minimize the costs, the advance rates of the roadheader should definitely be increased to more than that of 100 m/month for an economic excavation. The basic advantages of the roadheader are that it provides high safety with little disturbance to surrounding rock mass and low manpower even though the running cost are very high.
Overview of roadheader applications in Turkish mining and civil construction industries
Published in G. N. Panagiotou, T. N. Michalakopoulos, Mine Planning and Equipment Selection 2000, 2018
Roadheaders are the most widely used underground partial-face machines for excavation of soft to medium strength rocks, particularly the sedimentary rocks. They are usually used in underground mining operations for production and development operations particularly in coal and evaporitic rock mining. They have also utilization in metallic ore mining and industrial mineral mining. They are sometimes used in surface mining operations for particularly production of evaporitic rocks. They recently appeared in the room and pillar coal mining applications particularly for excavation of seams with strong inclusions. In civil construction industry, they are used for excavation of tunnels (railway, roadway, sewer, diversion tunnels, etc.), as well as enlargement and rehabilitation of these tunnels, large shaft excavations, foundation and channel excavations.
Mechanized tunneling technologies for weak rocks of Middle East, revisited.
Published in Cezary Madryas, Andrzej Kolonko, Beata Nienartowicz, Arkadiusz Szot, Underground Infrastructure of Urban Areas 4, 2017
J.B. Stypulkowski, F.G. Bernardeau, T.D. Sandell
Mechanized tunneling in rock usually involves use of the roadheader or TBM. The roadheader is a versatile method of rock excavation allowing non circular excavation and is adaptable to various underground conditions. This includes large or inclined openings, highly abrasive or high-strength rock conditions, as well as highly variable rock conditions. The benefit of this technology is reduced vibrations at the surface when comparing to TBM mining commonly causing ground borne vibrations. The Roadheader method can be used for a short tunnel option, connection to access ramps and in construction of all necessary enlargements. If the circular shape is a good choice and the tunnel is long, a TBM is usually used. There are many various types of TBMs in use today for the mechanized tunneling in hard rock. If a higher level of face support is required a TBM with full face excavation is likely to be used. There are three main types of full face TBMs: open-type gripper, double shield with gripper, and single shield. The type of TBM to be used largely depends on stand-up time and rock fracturing.
Vertical rock cutting rig (VRCR) suggested for performance prediction of roadheaders
Published in International Journal of Mining, Reclamation and Environment, 2019
Serdar Yasar, Ali Osman Yilmaz
Underground cold storages are very common in Central Anatolia Region of Turkey, especially in Cappadocia. A cold storage tunnel near Cappadocia was visited. An axial roadheader of a local brand was excavating the tunnel. Formation is crystal tuff and the excavation face has two joint sets at all so, formation is accepted as massive. Location map of the tunnel is given in Figure 5.