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Drill and Blast Method - railsystem

Drill and blast method is mostly used method for the excavation throughout the world. The method can be used in all types of rocks and the initial cost is lower than the mechanical method like TBM. This tunneling method involves the use of explosives.

Drilling and blasting - Wikipedia

Drill and Blast Tunneling Practices Gerhard Girmscheid1 and Cliff Schexnayder, F.ASCE2 Abstract: High-performance drill and blast methods for tunnel construction require that each of the individual working elements that constitute the construction process are optimized and considered as a system of sequential and parallel activities.

Drill and Blast Tunneling Practices - CTT consulting

Drill-and-blast excavation for tunneling projects depends on the precise drilling of a collection of holes into the face and the precise detonation of the blasting agent, which allows the rock to be extracted from a highly confined space.

Drill-and-Blast for Tunnel Construction - A Historical ...

The drill and blast method is a proven and commonly used rock tunneling method worldwide and in Hong Kong, such as the construction of several underground stations including Quarry Bay, Tai Koo, Fortress Hill and North Point Stations on the Island Line.

MTR - Shatin to Central Link - Construction - Construction ...

Hong Kong Occupational Safety and Health Association The Community of Safety & Health Practice in Hong Kong – Since 1977 ... Mr Chow has 30-year experience in blasting in site formation and tunneling works in Hong Kong. ... This presentation will highlight safety issues in the use of drill-and-blast method for tunnelling, for example, the ...

Seminar on “Safety in Tunnelling Using Drill-and-blast Method”

Seminar on "Safety in Tunnelling Using Drill-and-blast Method" Details Published on Monday, 13 August 2012 10:10 Dear Colleagues and Students, The Health, Safety and Environment Office and The Hong Kong Occupational Safety & Health Association will co-organize a safety seminar on "Safety in Tunnelling Using Drill-and-blast Method".

Seminar on "Safety in Tunnelling Using Drill-and-blast Method"

2.2 Drill and Blast This tunnelling method involves the use of explosives. Drilling rigs are used to bore blast holes on the proposed tunnel surface to a designated depth for blasting. Explosives and timed detonators are then placed in the blast holes. Once blasting is carried out, waste rocks and soils are transported out of the

Appendix 2.2 Tunnel Construction Methods - epd.gov.hk

Tunnel Construction Methods and Tunnel Construction Projects in Hong Kong ... The West Island Line tunnel between Sai Ying Pun and Kennedy Town is constructed with the Drill and Blast method. ... The Diamond Hill tunnels are currently being constructed for the Shatin-Central Link using the TBM method. Special Tunneling Circumstances

Tunnel Construction Methods and Tunnel Construction ...

Drill and blast tunneling is a method of excavation involving the controlled use of explosives to break rock. It was the primary means of tunneling through rock prior to the advent of tunnel boring machines.