ASTM D5192-08
(Practice)Standard Practice for Collection of Coal Samples from Core
Standard Practice for Collection of Coal Samples from Core
SIGNIFICANCE AND USE
A properly collected sample that includes the total coal bed interval provides a sample that is a representative cross section of the coal bed at the point of sampling. Core samples are taken for subsequent testing needed for evaluation of coal quality and characterization for commercial evaluations, for planning of mining operations to maintain coal quality, for the determination of coal rank in accordance with Classification D 388, and for geologic coal resource studies.
Note 1—Because of the potential for lateral variability, a sample may not represent the quality of the coal bed at another sample point. The reliability of the data generated from core samples is dependent on the number and spacing of the sample points and the variability of the coal characteristics in a given area.
Moisture determined directly from a core sample shall be considered questionable in any core sample because of possible contamination from drilling fluids and groundwater. If a more representative estimate of the inherent moisture content of the core sample (with the exception of certain low-rank coals) is desired, the sample should be analyzed according to Test Method D 1412.
SCOPE
1.1 This practice describes procedures for collecting and handling a coal sample from a core recovered from a borehole.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D5192–08
Standard Practice for
1
Collection of Coal Samples from Core
This standard is issued under the fixed designation D 5192; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope and which erode or abrade the sidewall of the borehole by the
action of the drilling. These zones can affect the accuracy of
1.1 This practice describes procedures for collecting and
certain geophysical logs (especially density). Corrections to
handling a coal sample from a core recovered from a borehole.
other geophysical logs can be made if a caliper log is available.
1.2 The values stated in SI units are to be regarded as the
The most common causes of caves or washouts include soft or
standard. The values given in parentheses are for information
fractured lithologies, the presence of water-producing zones,
only.
and the downhole pressure of the drilling medium (fluid or air)
1.3 This standard does not purport to address all of the
thatoftencausesdifferentialerosionofvariousstratawithinthe
safety concerns, if any, associated with its use. It is the
borehole.
responsibility of the user of this standard to establish appro-
3.1.3 concretion, n—in a geological sense, a mass of min-
priate safety and health practices and determine the applica-
eral matter found in rock of a composition different from its
bility of regulatory limitations prior to use.
own and produced by deposition from aqueous solution in the
2. Referenced Documents
rock.
2
3.1.4 core,n—indrilling,acylindricalsectionofrock(coal)
2.1 ASTM Standards:
that is usually 5 to 10 cm in diameter, taken as part of the
D 121 Terminology of Coal and Coke
interval penetrated by a core bit and brought to the surface for
D 388 Classification of Coals by Rank
geologic examination, representative sampling, and laboratory
D 1412 Test Method for Equilibrium Moisture of Coal at 96
analyses.
to 97 Percent Relative Humidity and 30°C
3.1.5 core barrels, n—two nested tubes above the bit of a
D 2013 Practice for Preparing Coal Samples for Analysis
coredrill,theouterrotatingwiththebit,theinnerreceivingand
D 2796 Terminology Relating to Megascopic Description
preserving a continuous section or core of the material pen-
of Coal and Coal Seams and Microscopical Description
3
etrated.Thefollowingtwotypesofinnerbarrelsarecommonly
and Analysis of Coal
used.
D 4371 Test Method for Determining the Washability Char-
3.1.5.1 split-tubebarrel,n—atypeofinnerbarrelconsisting
acteristics of Coal
oftwolongitudinalhalvesofpipeboundtogetherbyreinforced
D 4596 Practice for Collection of Channel Samples of Coal
tape at intervals along the barrel length that allows easy access
in a Mine
to a relatively intact core (by cutting the tape). (This is the
3. Terminology
preferred barrel type for coal exploration, when available.)
3.1.5.2 solid-tube barrel, n—a type of inner barrel consist-
3.1 Definitions—For additional definitions of terms, refer to
ing of a single solid-walled length of pipe in which removal of
Terminology D 121.
the core is accomplished by mechanical or hydraulic pressure
3.1.1 borehole, n—the circular hole through soil and rock
at one end of the pipe thus extruding the core onto a core tray.
strata made by boring.
(Thecoreislikelytobelessintactthanwhenasplit-tubebarrel
3.1.2 caves or washouts, n—zones of increased hole diam-
is used.)
eter caused by rock fragments that fall from the walls of a
3.1.6 core sample, n—that part of a core of rock or coal
borehole and can block the hole or contaminate the cuttings
obtained so as to accurately represent a thickness of a unit
penetrating by drilling.
1
This practice is under the jurisdiction of ASTM Committee D05 on Coal and
3.1.7 geophysical log, n—a graphic record of the measured
Coke and is the direct responsibility of Subcommittee D05.18 on Classification of
or computed physical characteristics of the rock section en-
Coals.
Current edition approved May 1, 2008. Published May 2008. Originally countered in a borehole, plotted as a continuous function of
approved in 1991. Last previous edition approved in 2007 as D 5192 – 07.
depth. Measurements are made by a sonde, which contains the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
detectors, as it is withdrawn from the borehole by a wire line.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Several measurements are usually made simultaneously, and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5192–07 Designation: D 5192 – 08
Standard Practice for
1
Collection of Coal Samples from Core
This standard is issued under the fixed designation D 5192; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice describes procedures for collecting and handling a coal sample from a core recovered from a borehole.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 121 Terminology of Coal and Coke
D 388 Classification of Coals by Rank
D 1412 Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30C
D 2013 Practice for Preparing Coal Samples for Analysis
D 2796 Terminology Relating to Megascopic Description of Coal and Coal Seams and Microscopical Description andAnalysis
3
of Coal
D 4371 Test Method for Determining the Washability Characteristics of Coal
D 4596 Practice for Collection of Channel Samples of Coal in a Mine
3. Terminology
3.1 Definitions—For additional definitions of terms, refer to Terminology D 121.
3.1.1 borehole, n—the circular hole through soil and rock strata made by boring.
3.1.2 caves or washouts, n—zones of increased hole diameter caused by rock fragments that fall from the walls of a borehole
and can block the hole or contaminate the cuttings and which erode or abrade the sidewall of the borehole by the action of the
drilling.These zones can affect the accuracy of certain geophysical logs (especially density). Corrections to other geophysical logs
can be made if a caliper log is available. The most common causes of caves or washouts include soft or fractured lithologies, the
presence of water-producing zones, and the downhole pressure of the drilling medium (fluid or air) that often causes differential
erosion of various strata within the borehole.
3.1.3 concretion, n—in a geological sense, a mass of mineral matter found in rock of a composition different from its own and
produced by deposition from aqueous solution in the rock.
3.1.4 core, n—in drilling, a cylindrical section of rock (coal) that is usually 5 to 10 cm in diameter, taken as part of the interval
penetrated by a core bit and brought to the surface for geologic examination, representative sampling, and laboratory analyses.
3.1.5 core barrels, n—two nested tubes above the bit of a core drill, the outer rotating with the bit, the inner receiving and
preserving a continuous section or core of the material penetrated. The following two types of inner barrels are commonly used.
3.1.5.1 split-tube barrel, n—a type of inner barrel consisting of two longitudinal halves of pipe bound together by reinforced
tape at intervals along the barrel length that allows easy access to a relatively intact core (by cutting the tape). (This is the preferred
barrel type for coal exploration, when available.)
3.1.5.2 solid-tube barrel, n—a type of inner barrel consisting of a single solid-walled length of pipe in which removal of the
core is accomplished by mechanical or hydraulic pressure at one end of the pipe thus extruding the core onto a core tray. (The core
is likely to be less intact than when a split-tube barrel is used.)
1
This practice is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.18 on Classification of Coals.
e1
Current edition approved Oct. 1, 2007. Published October 2007. Originally approved in 1991. Last previous edition approved in 1999 as D5192–99(2004) .
Current edition approved May 1, 2008. Published May 2008. Originally approved in 1991. Last previous edition approved in 2007 as D 5192 – 07.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
...
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