Download NORTH AMERICAN TUNNELING 2004 by Levent. Ozdemir PDF
By Levent. Ozdemir
This e-book contains papers from the North American Tunneling 2004 convention, subsidized by means of the yank Underground building organization. The subject of the convention is "Underground development - the practical approach to city difficulties" to mirror the expanding significance of finding city amenities within the usa underground for improved safeguard, to construct severe infrastructure the place it really is wanted and to enhance the functionality of city components. The papers are grouped in 4 significant issues: - administration of Underground initiatives - Public coverage and Underground initiatives - Advances in expertise - Case reports: Trials, Tribulation and Triumphs in Tunneling This paintings may still profit every person fascinated by any element of infrastructure, tunneling and underground building.
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Extra resources for NORTH AMERICAN TUNNELING 2004
New concepts and material designs of cutting tools and new production technologies to manufacture these tools. Laboratory testing of these units. Testing and optimization of the newly developed system by civil engineering and mining end users under practical conditions. qxd 2/18/04 8:16 PM Page 38 Figure 1. Icutroc’s project target for the development of a hard rock roadheader. techniques in order to harmonize the factors of the cutting process with the characteristics of the cutting machine. Thereby taking into consideration the rock properties, geometric parameters of the cutting unit and the operating characteristics of the cutting system (cutting speed, sump in depth and machine stiffness).
Another positive aspect of the lower cutting speed was the decreased impact impulse that does not exceed the mechanical strength of the pick tip anymore. qxd 2/18/04 8:16 PM 14 kWh/m3 Page 44 Approx. 1 0 Reference system Figure 10. Energy requirements per unit of cut rock. Figure 12. 5). Approx. cutting rate (incl. sump in and shearing) 28 m3/h New system 35–50 m3/h 50 The material to be cut is predominantly limestone with an unconfined compressive strength between 46 Mpa and 140 Mpa. The average unconfined compressive strength over the whole range of material to be cut is 120 Mpa.
S. Department of the Army, 1986). This manual provides procedures for the design and analysis of protective structures subjected to the effects of conventional weapons. Design of Structures to Resist Nuclear Weapons Effects, Manual 42 (ASCE, 1985). This manual was prepared for civilian use, and has been widely distributed throughout the world. The Design and Analysis of Hardened Structures to Conventional Weapons Effects (DAHS CWE) (DNA, 1995). This new Joint Services manual, written by a team of more than 200 experts in conventional weapons and protective structures engineering.