kimberlite uniaxial mpressive strength

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Geotechnical Modelling for Kimberlite Pipes

Analysis of the database of uniaxial and triaxial compressive strengths for phase 6/7 kimberlites showed that the results matched expectations, in so far as distinct differences in the strength The hardness of Kimberlite is 67 whereas its compressive strength is Not Available Streak is the color of rock when it is crushed or powdered The streak of Kimberlite is white whereas its fracture is conchoidal Luster of Kimberlite is the interaction of light with the surface of KimberliteProperties of Kimberlite Physical ThermalUniaxial compressive strength (UCS) is a key physical test relevant to iron ore crusher design and rock geomechanics for mining Tests are typically performed on intact lengths of NQ, HQ, or PQ diamond drill core and record the maximum axial load sustained at the point of failureUniaxial Compressive Strength an overview

Uniaxial Compression Test USB

Measurement of the point load strength I s and of the indirect C 0 The uniaxial compressive strength C 0 is then indirectly obtained by using the empirical relationship: where I s(50) is the point load strength of 50 mm (2 in) diameter cores UCS =C×Is (50) IS Kimberlite samples collected from Diavik, a diamond mine in northern Canada, were tested to define the rock’s uniaxial compressive strength, tensile strength, and hysteresis loop The samples wereRockbursting Potential of Kimberlite: A Case Study of Kimberlite samples collected from Diavik, a diamond mine in northern Canada, were tested to define the rock’s uniaxial compressive strength, tensile strength, and hysteresis loop The samples were separated into subrock types based on their descriptions from the mine geologistsRockbursting Potential of Kimberlite: A Case Study of

compressive strength of kimberlite and basalt

compressive strength of kimberlite and basalt Technische Universität München Analysis of mediaTUM rocks starting with weak sandstones with uniaxial compressive strength of 40 MPa to basalt with uniaxial we tested rocks with equivalent quartz content between 20 % (basalt) and 47: Specimen of a kimberlite rock of the mine Peakstar Get Price uniaxial compressive strength, can be preblasted to mine the dikes economically The success of preblasting however depends on the accuracy of blast and expansion hole drilling, especially in inclined dikes and available expertise in blasting The BAUER systems are suitable for inclined dikes with not more than 20 degrees from verticalInnovative Kimberlite Dike Mining Technologies uniaxial or unconfined compressive strength, GPa or MPa E = Young’s modulus, GPa or MPa G = shear modulus, GPa or MPa C = clay content m = HoekBrown strength coefficient σ f = failure stress, GPa or MPa σ n = normal stress, GPa or MPa V p = compressional velocity, m/s V s = shear velocity, m/s α = failure envelope slope ρ = density, kg/m 3 or g/cm 3: Φ =Compressive strength of rocks PetroWiki

THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa This low strength range might be influenced by physical characteristics Compressive strength of kimberlite and basalt compressive strength is the maximum force that can be applied to a rock sample without breaking it compressive strengh of baslt rock lvdivseacadets basalt compressive strength , in rock hardness than that of coarser grained igneous rocks like granite compressive strength basalt Get Pricecompressive strength of kimberlite and basaltGeotechnical Modelling for Kimberlite Pipes DB Tyler EKATI Diamond Mine, BHP Billiton, Analysis of the database of uniaxial and triaxial compressive strengths for phase 6/7 kimberlites showed that Figure 2 Validated compressive strength test data and intact strength envelopes for Koala phase 6/7Geotechnical Modelling for Kimberlite Pipes

Innovative Kimberlite Dike Mining Technologies

uniaxial compressive strength, can be preblasted to mine the dikes economically The success of preblasting however depends on the accuracy of blast and expansion hole drilling, especially in inclined dikes and available expertise in blasting The BAUER systems are suitable for inclined dikes with not more than 20 degrees from verticalSix different types of kimberlite from Diavik Diamond Mine were collected and the physical properties determined by uniaxial compressive strength tests, Brazilian tensile strength tests, and cyclic loading tests The rockburst profile for each rock type was determined based on three qualitative bursting indices developed from studies done on Rockbursting Properties of Kimberlite ERASix different types of kimberlite from Diavik Diamond Mine were collected and the physical properties determined by uniaxial compressive strength tests, Brazilian tensile strength tests, and cyclic loading tests The rockburst profile for each rock type was determined based on three qualitative bursting indices developed from studies doneRockbursting Properties of Kimberlite Diavik Diamond

THE EFFECT OF MICROWAVE IRRADIATION ON THE

The results indicate that MW irradiation reduced the strength of TK and limestone rocks It was concluded that Brazilian Tensile Strength (BTS) and Uniaxial Compressive Strength (UCS) of samples decayed proportionally with exposure time and power level Keywords: Kimberlite, Microwave Irradiation, Fragmentation, Mechanical Strength, Rock Excavation • The uniaxial compressive strength ofkimberlites typically ranges from 30 to 120 MPa Mining rock mass ratings can go as low as an MRMR value of30 over extensive areas of the orebody Several hundred kimberlite pipes and dykes are known to exist in South Africa Very few of the intrusions contain diamonds in economic quantities Only4 History of underground mining SAIMM = uniaxial compressive strength of the intact rock, and IL = interlocking factor of the rockmass 1 JP = JP = the jointing parameter combines by empirical relations jC (joint conditions) and Vb (block volume) in the following exponential equation derived from strength tests on large jointed rock samples: 02 jC ×Vb D (D = 037 jC 02 COMPARING THE RMR, Q, AND RMi CLASSIFICATION

THE EFFECT OF MICROWAVE IRRADIATION ON THE

2 to 10 kW The results indicate that MW irradiation reduced the strength of TK and limestone rocks It was concluded that Brazilian Tensile Strength (BTS) and Uniaxial Compressive Strength (UCS) of samples decayed proportionally with exposure time and power level Keywords: Kimberlite, Microwave Irradiation, Fragmentation, Mechanical Strength, Table 1 Typical values of uniaxial strength (in MPa) for nine common rock types (after Johnson and Degraff, 1988) Rock Tensile Strength (MPa) Compressive Strength (MPa) Limestone Sandstone Sandstone Sandstone Mudstone Limestone Limestone Ironstone Sandstone 1800 ± 062 (20) 1917 ± 021 (23) 2310 ± 048 (19) 2421 ± 083 (8) 3517 ± 3 STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 Intact uniaxial compressive rock strength is usually in the range of 4060 MPa (or less) Ultramafic rocks (determining the mineralogy is important as different minerals perform differently) Mineralogy — eg talc, chlorite content, mica, brucite, tochillonite and antigorite — percentageDesign approach for squeezing ground

THE EFFECT OF MICROWAVE IRRADIATION ON THE

2 to 10 kW The results indicate that MW irradiation reduced the strength of TK and limestone rocks It was concluded that Brazilian Tensile Strength (BTS) and Uniaxial Compressive Strength (UCS) of samples decayed proportionally with exposure time and power level Keywords: Kimberlite, Microwave Irradiation, Fragmentation, Mechanical Strength, = uniaxial compressive strength of the intact rock, and IL = interlocking factor of the rockmass 1 JP = JP = the jointing parameter combines by empirical relations jC (joint conditions) and Vb (block volume) in the following exponential equation derived from strength tests on large jointed rock samples: 02 jC ×Vb D (D = 037 jC 02 COMPARING THE RMR, Q, AND RMi CLASSIFICATION • The uniaxial compressive strength ofkimberlites typically ranges from 30 to 120 MPa Mining rock mass ratings can go as low as an MRMR value of30 over extensive areas of the orebody Several hundred kimberlite pipes and dykes are known to exist in South Africa Very few of the intrusions contain diamonds in economic quantities Only4 History of underground mining SAIMM

Division of Mines and Mineral Resources Report 1991/22

Uniaxial compressive 280310 tlm3 (average 29295 tlm3) O02Dl (weathered) O3DA (unweathered) 1040 GPa (weathered) 90110 GPa (unweathered) 530 GPa (weathered) 90100 GPa (unweathered) 1050 GPa (unweathered) strength: 40 MPa (unweathered) Porosity: Approximately 1% The physical property results from tests obtained at various The concrete requirements are based on uniaxial compressive strength (UCS) and slump Three concrete strengths were required at a slump of 180 mm, 25, 45 and 60 MPa The shotcrete requirements were more rigorous, including: A uniaxial cube compressive strength of not less than 45 MPa A uniaxial in situ core compressive strength of not lessThe design of a concrete transport system on Cullinan 1 Uniaxial compressive strength of rock material 2 Rock quality designation(RQD) 3 Spacing of discontinuities 4 Condition of discontinuities 5 Groundwater conditions 6 Orientation of discontinuities Qsystem The Qvalue determines the quality of the rock mass, but the support of an underground excavation is based notCONTRIBUTION OF THE GEOMECHANICAL

Pillar design – a science or an art? – AMC Consultants

This effect takes the form of downgrading the uniaxial compressive strength of a rock type to estimate the rock mass strength of the pillarforming material However, the presence of one or more geologic structures with weak infill material is often overlooked when using published rock mass classification or characterization pressive Strength Basalt czeueu basalt vs granite compressive strength , basalt vs granite compressive strength Uniaxial compressive strength and point load strength of rocks The types of rocks being tested include granite and tuff found in Hong Kong, with The uniaxial compressive strength (Co) vs the point load strength (Is(50)) forWhat Is The Compressive Strength Of Basaltbasalt rock compressive strength Brittle strength of basaltic rock masses with applications to Venus 21 Sep 2012 Rock mass strength is defined by three parameters including unconfined Basalt Rock Compressive Strength

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