MECHANICAL EXCAVATION METHOD FOR HARD ROCK TUNNELING BY NEW FREE FACE FORMING AND ROCK FRACTURING
نویسندگان
چکیده
منابع مشابه
Excavation Technology for Hard Rock - Problems and Prospects
Civil engineering projects have greatly benefited from the mechanical excavation of hard rock technology. Mining industry, on the other hand, is still searching for major breakthroughs to mechanize and then automate the winning of ore and drivage of access tunnels in its metalliferrous sector. The aim of this study is to extend the scope of drag bits for roadheaders in hard rock cutting. Variou...
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Over the last several decades mechanical mining machines have developed into highly productive, light weight, mobile machines which are able to economically mine many soft rock ore bodies. Due to the utilization of disc cutters Tunnel Boring Machines, with great mass and limited mobility, have developed the ability to cut the hardest rocks at high production rates. Technological advancements ha...
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Characterization of Excavation Damaged Zone (EDZ) around an underground excavation is a major research topic for deep geological disposal of medium to high level radioactive waste. Rock fracturing due to excavation and thermal loading and its resultant rock mass permeability change in the EDZ are important aspects in the EDZ characterisation. A new function to predict rock mass permeability cha...
متن کاملTectonics, fracturing of rock, and erosion
[1] We argue that by fracturing rock, not by raising it relative to base level, tectonics plays its most important role in causing rapid incision of valleys and rapid erosion of hillslopes. Tectonic deformation riddles the upper crust with fractures, which not only provide avenues for water flow and thus promote weathering and further disintegration of rock but also fragment bedrock into debris...
متن کاملRock Damage Caused by Underground Excavation and Meteorite Impacts
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ژورنال
عنوان ژورنال: Doboku Gakkai Ronbunshu
سال: 1997
ISSN: 0289-7806,1882-7187
DOI: 10.2208/jscej.1997.567_81