... ABSTRACT: Brittle fault zones often generate unstable conditions when encountered during the excavation of a tunnel. In the eastern Aar massif of central Switzerland, these zones can be described as a symmetric succession of brittle fault rocks. This sequence consists of the undeformed host...

... with existing references and the geological survey data of the land around the site. The surveyed area covers the continental shelf generally ranging in depth from 150 to 180 meters. This shelf is underlain by the sedimentary sequence ranging from Mesozoic to Quaternary in age shown in Figure 2. The sea beds...

... depths up to 100metres, and indicated the general startigraphic sequence of alluvial soils. A program of laboratory testing also provided initial data on the engineering properties of these soil deposits. Detail Design Phase A program of geotechnical investigations was undertaken in 1996 to provide...

... reverse scarp History flexural excavation metals & mining Tasmania centre pit schist western wall displacement discontinuity sequence North Pit slope angle Horizontal Drainhole savage river foliation shear Orebody ABSTRACT: The Savage River Iron Ore Mine, located...

... analysis and the results obtained have indicated a strong correlation between estimated and observed seismicity. The seismic problems expected during the extraction of the Scott Shaft pillar prompted an indepth investigation of the estimated seismic potential at each stage of the mining sequence...

... ABSTRACT: In this paper, the mechanism of tectonic earthquake is discussed qualitatively, and the sequence of Tangshan earthquake is simulated with aid of computer. On the basis of this, a group of mechanical parameters and some qualitative understanding for the deeply buried rocks is gained...

.... The ground stress was measured in a heading adit at the crown of main machine cavern. The values gained Sketch of Condition of Strata show that the lateral ground stress is two times greater than that at vertical. To get the reasonable design, the influence of various excavation sequences and the support...

... positions of the work presented (Skosobzev et.al 1974) 3 CALCULATION OF ROCK LAMINATION SEQUENCE ALONG THE WEAKENED CONTACTS The above methods of the calcula- tion for two-layer systems dealing with the processes of lamination and scaling in roof-rock of the underground chambers are generalized...

... related to geological investigation and orientation of the power caverns built in Taiwan are also reported in this paper. Furthermore, for reference purposes, the paper also embodies a description of the progress of rock mechanics tests, construction method and sequence which have been undertaken...

... compatible, provided that progressive relief of burden is achieved by carefully selecting the energy factor, initiation sequence and delay timing for each charge. Where large-diameter blastholes are used in horizontal benching and especially in downhole benching, it may well be preferable to presplit...

... (figure 1). The Sydney Basin is an asymmetrical synclinal structure with a faulted crystalline basement (figure 2), which is overlain by marine and terrestrial Permian sequences followed by Triassic fluvial and deltaic sedimentary rocks (Branagan et al, 1976). The northern and northeastern portions...

... residual axial strain irregular load axial stress weathered tuff specimen sequence loading condition Reservoir Characterization static strength History residual strain shear stress strength axial strain mitaka amplitude wave form Proceedings of the International Symposium on Weak Rock...

... sequence. The stratifi- cation ratio of shale and sandstone varies f'r orn 1:2 to 1:15 with oredo- minantly arenaceous sequence provi- ding mainly soft and porous sandst- one in upper Gondwana layers and the lower Gondwana is mainly shal.y and fine. Permeability values do not behave uniformly with depth...

... was packed by he filling materials. . Ci:ii)The mining sequence of the slice f is ~llustrated in Fig.3 as (i), (ii), (:iii) and tlV). After a cross cut had been mined out, he posts were timbered and the filling materials were packed. And then next cross- Cut Was excavated in the above sequence. (iv) Apart...

.... Figure 5 showsthe tunnel cross section of the subwaystation Lorenzkirche. '!he main problemhere was to prevent the pre- cious gothic church fran any damagedue to the excavation of the tunnels. The de- sign of the tied back pile wall and de- tailed specifications of the excavation sequence...

..., the authors present their conceE tion on the sequence of phases necessary for the proper formation of Rock Mec:lanics specialists. Reference is given to an underway series of Rock Mechanics Courses that are being taught at the Escola de Engenharia de Sao Carlos resulting from the participation of IPT...