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Underground Research Laboratory: an opportunity for basic rock mechanics
134A
Mines See also." 932102, 932271, 932290, 932292, 932332
932482 Laser measurement of open stope dilution Miller, F; Potvin, Y; Jacob, D CIM Bull V85, N962, July-Aug 1992, P96-102
1989 led to reduction in pillar width and increased productivity. Pillar strength is, however, only one parameter to be considered in planning safe and economic pillar extraction. Ground control problems and their relations to mine geology and geometry, in situ stresses, and mining method and sequencing are discussed. Solutions adopted are described.
General underground storage
Dilution has a significant effect on mine profitability, and there are enormous benefits to be gained from accurate measurement of the shape and size of an open stope. Dilution and the amount of ore remaining can be assessed by comparing excavation and orebody contours. The ongoing development of laser stope surveying systems by Noranda Minerals is described. Several case examples of their use and the advantages accruing are presented.
932486 Investigation of geomechanics and hydraulics at Kikuma underground crude oil storage plant Miyashita, K; Aoki, K; Hanamura, T; Takada, T In: Rock Meclumics in Japan, Volume VI P103-108. Publ Tokyo: Japanese Committee for 1SRM, 1991
932483 Staying in the seam. An overview of coal interface detection and steering Mowrey, G L; Maksimovic, S D; Pazuchanics, M J Engng Min J V193, N8, Aug 1992, P26-29
A pilot plant of 25000 kl capacity, a horizontal cavern with water curtain, was started in 1980 and monitoring continued until 1990, some 6 years after oil storage had ceased. The plant was at depth 42-62m in granitic rock with no major faults or fractures. The rock mass was characterised at the commencement of the project. Groundwater levels, pore pressure, and cavern stability have been monitored throughout. Little long term influence on hydrology is seen and the plant has remained stable.
Coal interface detection is fundamental to operation of seam guidance systems. Brief descriptions are given of several such systems under development. There are two basic approaches to coat interface detection, coal thickness measurement or coal-rock interface measurement. The former can utilise natural gamma or electromagnetic radiation or radar. The latter may use monitoring of pick force, vibration, motor current, or coal/pick temperature, or use video or optical methods or online coal analysis by a range of methods. Multisensor systems are possible. Organisations working in these fields are listed. 33refs.
932484 Damage to tunnels in gold mines - are there cost effective solutions? Jager, A J; Wojno, L Z
Proc SANGORM Symposium on Impact of Rock Engineering on Mining and Tunnelling Economics, Welkom, 7-8 October 1991 P47-52. Publ Orange Grove: SANGORM, 1991 About 800krn (13% of total) of tunnels in South African gold mines become redundant and are replaced each year. Development and support and damage remediation costs are large, despite application of rock engineering principles in design. Ground conditions and support categories are described. Damage and losses and current rock engineering practices are summarised. Future applications of cone bolt yielding tendons, footwall stabilisation, improved blasting practice, and support design and installation methods to better the status quo are discussed.
932485 Pillar extraction experiences at Utrecht Colliery Hill, D J; Madden, B J
Proc SANGORM Symposium on Impact of Rock Engineering on Mining and Tunnelling Economics, Welkom, 7-8 October 1991 P65-78. Publ Orange Grove: SANGORM, 1991 Pillar extraction is an established method of increasing recovery. Traditionally, pillar design was based on experience and Salamon's safety factor formula to determine minimum pillar size. The introduction of the squat pillar strength formula in
932487 Modelling of underground cavity storage considering rock mass discontinuities (In French) Baroudi, H; Piguet, J P; Josien, J P; Arif, I; Lebon, P Proe 7th ISRM International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P675-678. Publ Rotterdam: A A Balkema, 1991 Numerical analysis is an important tool in design of storage caverns as it allows parametric evaluation of the relative importance of properties of the rock mass itself and its inhomogeneity, anisotropy, and discontinuous nature. The advantages of several methods of analysis for this work are compared: finite element analysis, block modelling using RESOBLOK or BSA (Block Stability Analysis), and distinct element analysis (UDEC). Numerical predictions are briefly compared to field measurements taken during construction of a series of caverns in anisotropic schistose rock cut by natural discontinuities.
Radioactive waste disposal 932488 Underground Research Laboratory: an opportunity for basic rock mechanics Martin, C D; Simmons, G R ISRM News J V1, N1, Sept 1992, P5-12 The URL is a multidisciplinary research and engineering project in the Lac du Bonnet granite batholith near Pinawa, Manitoba. Groundwater and solute transport, in situ rock stress, temperature and time dependent deformation and failure, rock excavation techniques, and performance of seals and backfills are being studied. The historical perspective and operating phase program are outlined. Work to date is described on blasting, stress measurement, failure observation, acoustic emission and seismic monitoring, long term rock strength, and numerical modelling of the URL.
© 1993 Pergamon Press Ltd. Reproduction not permitted
Mines See also." 932102, 932271, 932290, 932292, 932332
932482 Laser measurement of open stope dilution Miller, F; Potvin, Y; Jacob, D CIM Bull V85, N962, July-Aug 1992, P96-102
1989 led to reduction in pillar width and increased productivity. Pillar strength is, however, only one parameter to be considered in planning safe and economic pillar extraction. Ground control problems and their relations to mine geology and geometry, in situ stresses, and mining method and sequencing are discussed. Solutions adopted are described.
General underground storage
Dilution has a significant effect on mine profitability, and there are enormous benefits to be gained from accurate measurement of the shape and size of an open stope. Dilution and the amount of ore remaining can be assessed by comparing excavation and orebody contours. The ongoing development of laser stope surveying systems by Noranda Minerals is described. Several case examples of their use and the advantages accruing are presented.
932486 Investigation of geomechanics and hydraulics at Kikuma underground crude oil storage plant Miyashita, K; Aoki, K; Hanamura, T; Takada, T In: Rock Meclumics in Japan, Volume VI P103-108. Publ Tokyo: Japanese Committee for 1SRM, 1991
932483 Staying in the seam. An overview of coal interface detection and steering Mowrey, G L; Maksimovic, S D; Pazuchanics, M J Engng Min J V193, N8, Aug 1992, P26-29
A pilot plant of 25000 kl capacity, a horizontal cavern with water curtain, was started in 1980 and monitoring continued until 1990, some 6 years after oil storage had ceased. The plant was at depth 42-62m in granitic rock with no major faults or fractures. The rock mass was characterised at the commencement of the project. Groundwater levels, pore pressure, and cavern stability have been monitored throughout. Little long term influence on hydrology is seen and the plant has remained stable.
Coal interface detection is fundamental to operation of seam guidance systems. Brief descriptions are given of several such systems under development. There are two basic approaches to coat interface detection, coal thickness measurement or coal-rock interface measurement. The former can utilise natural gamma or electromagnetic radiation or radar. The latter may use monitoring of pick force, vibration, motor current, or coal/pick temperature, or use video or optical methods or online coal analysis by a range of methods. Multisensor systems are possible. Organisations working in these fields are listed. 33refs.
932484 Damage to tunnels in gold mines - are there cost effective solutions? Jager, A J; Wojno, L Z
Proc SANGORM Symposium on Impact of Rock Engineering on Mining and Tunnelling Economics, Welkom, 7-8 October 1991 P47-52. Publ Orange Grove: SANGORM, 1991 About 800krn (13% of total) of tunnels in South African gold mines become redundant and are replaced each year. Development and support and damage remediation costs are large, despite application of rock engineering principles in design. Ground conditions and support categories are described. Damage and losses and current rock engineering practices are summarised. Future applications of cone bolt yielding tendons, footwall stabilisation, improved blasting practice, and support design and installation methods to better the status quo are discussed.
932485 Pillar extraction experiences at Utrecht Colliery Hill, D J; Madden, B J
Proc SANGORM Symposium on Impact of Rock Engineering on Mining and Tunnelling Economics, Welkom, 7-8 October 1991 P65-78. Publ Orange Grove: SANGORM, 1991 Pillar extraction is an established method of increasing recovery. Traditionally, pillar design was based on experience and Salamon's safety factor formula to determine minimum pillar size. The introduction of the squat pillar strength formula in
932487 Modelling of underground cavity storage considering rock mass discontinuities (In French) Baroudi, H; Piguet, J P; Josien, J P; Arif, I; Lebon, P Proe 7th ISRM International Congress on Rock Mechanics, Aachen, 16-20 September 1991 V1, P675-678. Publ Rotterdam: A A Balkema, 1991 Numerical analysis is an important tool in design of storage caverns as it allows parametric evaluation of the relative importance of properties of the rock mass itself and its inhomogeneity, anisotropy, and discontinuous nature. The advantages of several methods of analysis for this work are compared: finite element analysis, block modelling using RESOBLOK or BSA (Block Stability Analysis), and distinct element analysis (UDEC). Numerical predictions are briefly compared to field measurements taken during construction of a series of caverns in anisotropic schistose rock cut by natural discontinuities.
Radioactive waste disposal 932488 Underground Research Laboratory: an opportunity for basic rock mechanics Martin, C D; Simmons, G R ISRM News J V1, N1, Sept 1992, P5-12 The URL is a multidisciplinary research and engineering project in the Lac du Bonnet granite batholith near Pinawa, Manitoba. Groundwater and solute transport, in situ rock stress, temperature and time dependent deformation and failure, rock excavation techniques, and performance of seals and backfills are being studied. The historical perspective and operating phase program are outlined. Work to date is described on blasting, stress measurement, failure observation, acoustic emission and seismic monitoring, long term rock strength, and numerical modelling of the URL.
© 1993 Pergamon Press Ltd. Reproduction not permitted