... emissions. Since the first documented coal and gas outburst occurred in the Issac Colliery in France (1843), as many as 30,000 outbursts have occurred in the world coal mining industry (Lama and Bodziony, 1998). Using in situ borehole pressure measurements, Diaz Aguado and Gonzalez Nicieza (2007) have...

.... The Kunigami phyllite was chosen as the load-bearing rock unit for pile design of the bridge. 414 2.2 New Borehole Drillings As the preliminary geotechnical investigations were mostly based on soil-mechanics types of investigations and evaluations, they were not appropriate. For this reason, several new...

... and the confined aquifer located at the base. E­ xcessive groundwater withdrawal from one of these aquifers causes interaction throughout their contacts. Six drainage borehole further operated about 20 days of after the dewatering process, which increased 2-3 times compared with the amount discharge in the same...

... grouting drillhole with use of filling materials used by the authors. Therefore the spacing distances between the grouting boreholes can be chosen as approximately 40m. However, if there are much deposits in caverns or the area is densely urbanized, the spacing of grouting boreholes should be less than 40m...

...2019 Rock Dynamics Summit Aydan et al. (eds) © 2019 Taylor & Francis Group, London, ISBN 978-0-367-34783-3 Attempt of lignite pit exploration by seismic tomography using directional drilling borehole K. Kiho Present; Kawasaki Geological Engineering Co., Ltd., Tokyo, Japan Former; Central Research...

... layout of the 140 m gallery. Two adits (adits No. 2 and No. 3) were excavated from the horizontal gallery. From these adits, horizontal boreholes were drilled before the horizontal gallery (broken lines in Figure 2; excavated from April 2009) was excavated. Measurement instruments were installed...

... Abstract: The hydraulic fracturing technique is a method to measure the stress states in the rocks based on the change of the water pressure observed when the induced fracture in the borehole wall generated by water pressure reopens or closes. A new standard of hydraulic fracturing method...

... for cold region, Sapporo, Hokkaido, Japan ABSTRACT: In this study, the elastic modulus along a borehole for the construction of a national highway tunnel in ground consisting of volcanic and pyroclastic rocks was estimated by using dynamic elastic modulus. The data used in estimating the elastic modulus...

...% of the geological area. Despite this fact, marble and the cavities associated, play an important role within the building strategies of the city, being located in areas crucial for the development of new residential areas in Hong Kong. In order to better understand the issue, boreholes from Area 90 in Ma On Shan...