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Keywords: shaft
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Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0067
... ABSTRACT: This paper presents several geotechnical challenges experienced while excavating two shaft stations at the depths of 2490 m and 2550 m in highly stressed grounds, along with engineering solutions that effectively reduce exposure and risk associated with the excavations. Proactive...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-1206
... and as is the current mining practice at Candelaria, they were not filled on completion creating a mining challenge for the open pit operation. Because of the size of the stope voids, backfilling was required by means of vertical shafts constructed through an engineered temporary crown pillar. Engineering...
Proceedings Papers
Rockburst Damage Characterization in a South African Gold Mine Subjected to High Horizontal Stresses
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0607
... within the shaft. The study indicates that with the large energy release, damages were only observed with fewer stopes. This is not only influenced by the high horizontal stresses but also by the rockmass mineralogical and contrasting geomechanical properties. The rockburst analysis within active mine...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0567
... repository. A comprehensive geomechanics finite element modelling approach is adopted to address the challenges arising from nuclear waste storage. A unified finite element model has been constructed for the shaft, gallery, and storage cavities. Finite element modelling has been performed to simulate...
Proceedings Papers
A. Shaterpour-Mamaghani, H. Copur, D. Tumac, C. Balci, T. Erdogan, E. Dogan, E. Altintas, A. Kocbay, O. Sirin
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0274
... ABSTRACT: Raise Boring Machines (RBMs) as the fast and safe operation of drilling excavation of vertical and/or inclined shafts are used in the mining and construction projects for different purposes. Proper selection and accurate performance prediction of these machines are very important...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0685
... between investigation holes it was not possible to conceptualize heterogeneity within single fractures. A new underground dataset has become available from the excavation of four c. 400 m deep vertical access and ventilation shafts, where dense drilling around the circumference of the shafts for several...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0042
...-m diameter mine shaft at a depth of 1.2 km in an average quality rock mass. The shaft wall was supported by shotcrete and concrete liners installed at 3 m and 12 m behind the face, respectively. However, only shotcrete support was considered in the numerical simulations. The shotcrete liner...
Proceedings Papers
Chun Chang, Sharon Borglin, Chunwei Chou, Timothy Kneafsey, Yuxin Wu, LianGe Zheng, Seiji Nakagawa, Hao Xu, Luca Peruzzo, Jens Birkholzer
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1772
..., which may detrimentally affect the long-term performance of bentonite barrier systems. ct image experiment dry-out zone upstream oil & gas clay swelling heater shaft non-heated column center shaft thermocouple sensor thermocouple density distribution shaft bentonite solid waste...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1597
... tunnel Reservoir Characterization strategic planning and management project management TBM neighborhood completion operation excavation outlet shaft diameter shaft tunnel communication bedrock albany park stormwater diversion tunnel contractor construction Chicago fractured rock zone...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2005
...-pressure-electrical conductivity profiling down one of the major vertical passageways, the #6 Shaft, characterized the water filling the deep underground portions of the facility. Although water chemistry from water sampled from fractures and boreholes varies, the water composition in the #6 Shaft...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-126
... ABSTRACT: The #4 Shaft at Hecla’s Lucky Friday Mine, excavated to a depth of 2,923 m below surface, was completed in 2017. Although the shaft did not extend to record-breaking depths, it did experience extraordinary ground stresses due to an unusually high in-situ stress ratio given its depth...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0331
... ABSTRACT: In the article the interaction of drilled shafts with rock mass, folded by rocks of low to medium strength, is analyzed. The analysis is based on the results of numerical three-dimensional simulation of the behavior of drilled shafts under the action of vertical compressive load...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-690
... challenge has been mines going deeper and needing bigger and better single excavation .i.e. shafts to ventilate and provide ore skipping options. The stability concerns and shaft sinking method will be studied to evaluate the ground support needed and address with risk analysis to avoid costly...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-836
... be significantly reduced and the ground movement can typically be controlled within 2 cm while the deformation of the pipe roof is smaller than 0.5 cm [7]. roof pipe pipe excavation support 1800-mm diameter pipe metals & mining construction duration shaft alignment diameter pipe optimization...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-597
.... Reservoir Characterization seam subsidence coal cement fly ash grout Upstream Oil & Gas borehole Thickness stabilization project excavation grout hole void shaft mixer truck Tomago Seam investigative grout hole grout pillar Borehole Seam mining geology Australia ARMA 13-597 Some...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-532
... to assess the long-term geomechanical behavior of the repository and the shafts after the 100 year operational life of the facility. The primary concern regarding long-term performance of the unbackfilled emplacement rooms is their degradation over time subjected to different loading conditions including...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-407
... for a shaft excavation in the Queenston Formation at the proposed Deep Geological Repository (DGR) for Low and Intermediate Level Nuclear Waste storage near Kincardine, Ontario. The maximum damage depth was determined to be 1.9m deep, with an average of 1.5m. Important differences are discussed between...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-281
... the challenges being encountered, the success of the existing system, and the new expansion. Reservoir Characterization Upstream Oil & Gas Coeur vein accelerometer Wallace sensor real time system stope metals & mining recorder fiber optic line shaft cable mining area seismic...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-305
... Artificial Intelligence risk assessment extraction metals & mining Reservoir Characterization risk and uncertainty assessment expert system rehabilitation stope Ground Fall ore seismic event shaft risk management application consequence Upstream Oil & Gas block 4 block...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-353
... ABSTRACT: Rock Mass Rating and the Q-system were employed for the classification of rock mass in the periphery of a shaft sunk in igneous intrusive formations. The rock classification data obtained by two geological mapping teams are compared in this experimental study. It was found...
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