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coal compressive strength

  • Coal strength and Young's modulus related to coal rank ...

    The current understanding in the compressive strength of coal is that uniaxial compressive of coal strength (UCS) and Young's modulus depend on ash content and carbon content (Szwilski, 1985) and the strength varies with carbon content in a U-shaped band (Szwilski, 1985, Palmer et al., 2005) .


  • MEASUREMENT OF CRUSHING STRENGTH OF COAL …

    COMPRESSIVE STRENGTH,Qc(N/m2) Figure1: Relationship between the crushing strength, c and the agglomerate diameter, D for coal powder. Coal agglomerates diameter and crushing strength analysis IV. RESULTS AND DISCUSSION The effect of diameter on the agglomerates strength shows that the crushing strength of coal is dependent on the


  • USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL ...

    the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that they estimate, are an indication of intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE ...


  • Compressive strength of rocks - PetroWiki

    Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0). Lithology is commonly derived during log analysis, so m may be estimated (Table 1). What is needed still is an initial measure of rock strength provided by C 0.


  • International Journal of Coal Geology

    compressive strength in coal. 1. Introduction Coal is a naturally discontinuous, inhomogeneous, and anisotropic material. The uniaxial compressive strength (UCS) of coal is sig-nificantly influenced by sample size and microstructures, including the presence of mineral inclusions and pre-existing cracks (Protodiakonov and Koifman, 1963; Wagner ...


  • Compressive Strength - an overview | ScienceDirect Topics

    Compressive strength is the standard strength parameter of concrete that can be evaluated under site conditions as well. The most common method is to use cylinder cores drilled off the structure. Momber (1998b) was probably the first to suggest to use the way how a cylinder fails during the compression test as a criterion of the material behaviour during hydrodemolition.


  • Estimation of Uniaxial Compressive Strength of Coal ...

    2015 Coal Operators' Conference The University of Wollongong 36 11 – 13 February 2015 ESTIMATION OF UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURES OF PRANHITA-GODAVARI VALLEY, INDIA USING SONIC LOGS Makesh Shanmukha Rao1, Gudlavalleti Uday Bhaskar2 and Shivakumar Karekal3 ABSTRACT: The Singareni Collieries Company Limited (SCCL) carries out …


  • Compressive Strength of Coal

    The compressive strength have been measured on irregular shaped coals ranging from 0.1mm to 2.0mm particle size for low ash coals in Hokkaido. The results obtained from these experiments and those obtained from the silica ball-mill grinding test for the same coals are summerized as …


  • The effect of specimen size on compressive strength of coal

    4. CONCLUSIONS Experimental data on the strength of coal as a function of the size of cubical speci- mens tested underground indicates that from a certain specimen size onwards, about 5 ft, the strength remains constant. THE EFFECT OF SPECIMEN SIZE ON COMPRESSIVE STRENGTH OF COAL 335 2.


  • The uniaxial compressive strength of coal: Should it be ...

    The Bureau of Mines has recently completed a comprehensive study of coal strength. More than 4000 individual test results from over 60 scams were extracted from the literature and combined in the most complete data base of the uniaxial compressive strength of coal ever assembled. In addition, more ...