Results 201 to 210 of about 1,591 (253)
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Blast vibration monitoring of rock excavations
Canadian Geotechnical Journal, 1977Vibration monitoring of blasting for rock excavation has been undertaken at a number of large hydroelectric and other construction sites in Canada. This paper presents the relationships between vibration measurements and intensity of blasting at different project sites.
L. D. Keil +3 more
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Excavation of rock using blasting techniques: A review of blasting guidance
2016Bulk excavation of a site in Turkey was required to a depth of up to 37m below ground level, over a site area in excess of 35,000m2. Beneath a thin layer of soil, the excavation was to be into moderately strong to strong limestone, and was to be undertaken by blasting.
Cabarkapa, Zeljko +3 more
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2016
As the restriction of the surrounding conditions, non-blasting method of rock excavation have to be use. Different kinds of non-blasting methods for rock excavation are introduced in this chapter.
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As the restriction of the surrounding conditions, non-blasting method of rock excavation have to be use. Different kinds of non-blasting methods for rock excavation are introduced in this chapter.
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Blasting Design for Underground Excavation
2016In this chapter, blasting designs for tunnels and shafts, including drillholes patters, explosive charging calculation and firing sequences are illustrated in detail. As the case studies, the usage of electronic detonators for tunnel blasting are introduced.
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Contour Blasting for Underground Excavation
2016For reducing the damage to surrounding rock beyond the excavation profile and also achieving a relative smooth surface of the roof and walls, smooth blasting as the main contour blasting technique is usually used in underground excavations. The characters of smooth blasting, Charge calculation and charging methods are introduced in this chapter.
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Contour Blasting Technique for Surface Excavation
2016Contour blasting is also called controlled blasting as its main purpose is to minimize the damage to the rock (overbreak) beyond the boundary of the designed contour of the excavation. Varies of contour blasting techniques and their mechanism, contour blasting design and working methods are illustrated in this chapter.
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Remote Control of Drill and Blast Excavation and Demolition
1988The development of a remotely-controlled drill and blast excavation system is desirable both because it is potentially more economical than mechanical excavation in the hardest rocks and because it will improve safety. A serious impediment to the development of such a system has been the problem of relocating and reentering previously drilled ...
Robert G. Lundquist +2 more
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Introduction to Underground Excavation by Drilling and Blasting
2016Drilling and blasting are the most common methods for tunnelling and underground excavation. Working cycle of D & B excavation, excavation methods and charging methods for tunnels driving, shafts sinking and raise driving are illustrated in this chapter.
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Rock Mechanics and Rock Engineering, 2013
The article presents comparison of excavation damage zones resulting from blasting with nonel detonators and blasting with electronic detonators. The nonel detonator is a common type of detonator used in drill-and-blast tunnel excavations, while the use of electronic detonators in recent years has also been gaining popularity in complex tunneling ...
Li, Yanzhi +5 more
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The article presents comparison of excavation damage zones resulting from blasting with nonel detonators and blasting with electronic detonators. The nonel detonator is a common type of detonator used in drill-and-blast tunnel excavations, while the use of electronic detonators in recent years has also been gaining popularity in complex tunneling ...
Li, Yanzhi +5 more
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Advanced Materials Research, 2013
The influence of the single cavern blasting excavation in underground caverns on the stability of surrounding rock of adjacent caverns can not be ignored.In–situ blasting vibration test and dynamic finite element analysis were used to study the laws of blasting seismic wave propagation, two different material constitutive models were adopted, compared ...
Peng Cheng Xu +3 more
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The influence of the single cavern blasting excavation in underground caverns on the stability of surrounding rock of adjacent caverns can not be ignored.In–situ blasting vibration test and dynamic finite element analysis were used to study the laws of blasting seismic wave propagation, two different material constitutive models were adopted, compared ...
Peng Cheng Xu +3 more
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