pyroxenite compressive strength

Hard rock cutting and the development of a continuous ...

Union Section, it had a low uniaxial compressive strength of 26 MPa; the sample also contained waste bands of pyroxenite with a UCS of 110 MPa. However, the Cherchar Abrasivity Index for the chromite ore was 5,4. This is an indication of Hard rock cutting and the development of a continuous mining machine for narrow platinum reefs

strength of dolerite and granite - lacasadibabbai.it

the prediction of compressive strength for rocks such as Dolerite, Norite and Pyroxenite. According to ISRM commission on Standardization of Laboratory and Field Test report [8], the compressive strength …

Properties of Nepheline Syenite | Physical | Thermal

Rocks are rated on the on the Moh's Hardness Scale which rates the rocks on the scale from 1 to 10. Rocks with hardness 1-3 are soft rocks from 3-6 are medium hardness rocks and 6-10 are hard rocks. The hardness of Nepheline Syenite is 5.5-6 whereas its compressive strength is 150.00 N/mm 2. Streak is the color of rock when it is crushed or ...

TOWARDS AN IMPROVED PILLAR DESIGN METHODOLOGY …

TOWARDS AN IMPROVED PILLAR DESIGN METHODOLOGY AT BATHOPELE MINE Y. Rajpal Anglo American Platinum Ltd Abstract The Hedley and Grant pillar strength formula is widely used within the South African mining industry to calculate pillar strengths in bord and pillar mining layouts, and is currently being used at Bathopele Mine.

'Rock cutting' – platinum mining of the future?

uniaxial compressive strength (UCS) of between 30 and 80 MPa, and the Merensky Reef, which has a UCS of about 130 MPa. Table I indicates the general rock mass UCS, Young's ... pyroxenite and anorthosite respectively, are hard to very hard with a UCS of up to 200 MPa. Apart from the UCS,

Correlation between Uniaxial Compressive Strength and ...

PDF | On Jan 1, 2007, M.Akram and others published Correlation between Uniaxial Compressive Strength and Point Load Index for Salt-Range Rocks

Geotechnical Assessment of Dimension stone Resources in …

include compressive strength, density, water absorption and ... pyroxenite) formed during Late Cretaceous at the expanding Neo-Tethys oceanic ridge [3]. The ophiolite is a major feature of Oman geology and are . potentially an extensive resource of dimension stone and contain several bodies of gabbro, and coarse grained igneous ...

A Probabilistic Structural Design Process for Bord and ...

At the time of the research, the average uniaxial compressive strength of five samples for an ore body had been deemed sufficient to design a mine. Detailed analysis of strength values showed that the coefficient of variation (COV) for pyroxenite and chromitite was 0.33 nearly falling outside the region of even statistical predictability.

REGOLITH MATERIALS Sheila A. Thibeault - NASA

REGOLITH MATERIALS Sheila A. Thibeault Senior Materials Research Engineering ... pyroxenite Dunite Martian Regolith ... Compressive Yield Strength for Regolith/PE Microcomposites Crosshead speed 0.05 in/min 0.008 in/min Strength, ksi. 998 0 0.5 1 1.5 2 2.5 3 5 wt% PE 7 wt% PE 10 wt% PE 15 wt% PE 20 wt% PE Pure PE Ultimate Compressive Strength

Rock Sample Collection and Unconfined Compressive Test ...

grained, black gabbro to norite, referred as pyroxenite for use as a dimension stone and/or landscape/decorative aggregate product. This was the target of historical exploration programs, recent programs and remains the focus of current explor a-tion efforts. This report addresses rock sample collection for testing of rock strength. Field

ROCK STRENGTH DOMAINING AT MOGALAKWENA MINE, …

ROCK STRENGTH DOMAINING AT MOGALAKWENA MINE, SOUTH AFRICA An Approach to On-Site Geometallurgical Characterisation Jason Germiquet (Student number: 675592) School of Engineering and the Built Environment University of the Witwatersrand Johannesburg, South Africa. A research report submitted to the Faculty of Engineering and the Built

Uniaxial compressive strength and point load strength of ...

Using these assumptions, the tensile strength of rocks can be estimated by (2) and (3) in terms of D, L, P and v. Our next step is to relate the tensile strength and the uniaxial compressive strength of the solid. We further assume here that there exists a fixed ratio between the tensile strength and the uniaxial compressive strength of rocks.

APPENDIX 1 - University of the Witwatersrand

Compressive Strength (UCS) test. The UCS (σ c) of the intact rock is used in rock mass classification schemes (section 3.7), and as a basic parameter in the rock mass strength criterion. These tests are usually done on cylindrical samples (Jager and Ryder, 1999). It is used to determine the unconfined compressive strength (σ c

Division of Mines and Mineral Resources - Report 1991/22

Division of Mines and Mineral Resources - Report 1991/22 Some physical properties of dolerite by D.J. Sloane Abstract Dolerite, an igneous rock, is exposed over half of Tasmania. The good physical and chemical properties of the rock make it suitable fora wide variety of uses. Crushed rock is used as aggregate in concrete, as road sub-base and

Evaluation of simple methods for assessing the uniaxial ...

1.. IntroductionRock engineers widely use the uniaxial compressive strength (UCS) of rock in designing surface and underground structures. The procedure for measuring this rock strength has been standardised by both the American Society for Testing and Materials (ASTM) and the International Society for Rock Mechanics (ISRM) .Although, the method is relatively simple, it is time consuming …

(PDF) Geotechnical applications in open pit mining | Necmi ...

A highly sheared zone of pyroxenite up to 5 m in width and dipping at 45 separates the barren hanging wall norites from the pyroxenite ore body. The zone has a rock quality designation (RQD) less than 5% and a uniaxial compressive strength (UCS) of around 30 MPa.

Correlation between Uniaxial Compressive Strength and ...

Correlation between Uniaxial Compressive Strength and Point Load Index for Salt-Range Rocks M. Akram1 and M. Z. A. Bakar2 1 2 Mining Engineering Department, University of Engineering & Technology, Lahore, Pakistan Geological Engineering Department, University of Engineering & Technology, Lahore, Pakistan

pyroxenite compressive strength - amastuola.eu

Effect of pyroxenite and olivine minerals as . 2017-8-25 · Effect of pyroxenite and olivine minerals as source of MgO in hematite pellet on improvement of metallurgical properties Jagannath Pal1, ... viz green compressive strength (GCS), green drop strength number (GDSN), dry compressive strength (DCS) and moisture content.

Development of Pellet-Sinter Composite Agglomerate for ...

Jun 23, 2017· Chemical analysis of lime stone and pyroxenite, used as flux materials are presented in Table 2. ... The properties of green pellets viz. green compressive strength, green drop strength, and dry compressive strength were measured for representative samples. It involved at least 20 pellets of 10–11 mm diameter to achieve an average value of ...

(PDF) Quantifying the size effect of rock mass strength

Quantifying the Size Effect of Rock Mass ... Size Effect of Rock Mass Strength P.A. Cundall et al. Figure 9 Numerically obtained values of unconfine d compressive strength of Micaceous Pyroxenite .

The strategic and tactical value of a 3D geotechnical ...

The Platreef is a pyroxenite orebody hosted within the northern limb of the basic igneous rocks of the Bushveld Complex (Figure 1). It has an economic strike length of 40 ... calculation of uniaxial compressive strength (UCS). The diamond drill exploration boreholes are logged for the same information as described above. There is therefore a

Estimation for the Uniaxial Compressive Strength of Rocks ...

Kaya, A. and Karaman, K., 2016, Utilizing the strength conversion factor in the estimation of uniaxial compressive strength from the point load strength index, Bulletin of Engineering Geology and the Environment, Vol. 75, 341-357.

Correlation between Uniaxial Compressive Strength and ...

uniaxial compressive strength from the results of the point load test. 4. Test Results and Discussion 4.1 Uniaxial Compressive Strength Test Results The mean values of uniaxial compressive strength of the tested rocks are listed in Table 2. The strength values range from …

(PDF) Effect of pyroxenite flux on the quality and ...

Effect of pyroxenite flux on the quality and microstructure of hematite pellets. ... Effect of pyroxenite fl ux on the quality and microstructure of hematite ... The greater compressive strength ...

Mining by rock cutting in narrow reefs - hydrometallurgy.co.za

Union Section, it had a low uniaxial compressive strength of 26 MPa; the sample also contained waste bands of pyroxenite with a UCS of 110 MPa. However, the Cherchar abrasivity index for the chromite ore was 5.4. This is an indication of the extreme abrasivity of the UG2 reef, on a …

Transactions and Proceedings of the Royal Society of New ...

the Olivine Range. Zones of structural weakness trending nearly east and west (cf. Cunaris and Dusky Sounds), are represented by the Lower Hidden Falls, Lower Olivine, Forgotten, Diorite, Barrier and Red Pyke Valleys, the Barrier Range, the Upper Dart Valley, the highest portion of the Rees (which is continued through a low col into Snowy Creek), the lower part of the West Branch of the ...

Mechanical properties of Finnish rocks based on uniaxial ...

Mechanical properties of Finnish rocks based on uniaxial compressive strength and tensile strength tests Master´s thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Technology in the Degree Programme in Engineering. In Espoo 25.5.2015 Supervisor: Professor Mikael Rinne