ASTM D4596-99(2004)
(Practice)Standard Practice for Collection of Channel Samples of Coal in a Mine
Standard Practice for Collection of Channel Samples of Coal in a Mine
SCOPE
1.1 This practice describes procedures for collecting a coal sample from a channel extending from top to bottom in the face of a coal seam in a mine.
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. For specific precautionary information, see Note 0.
1.2 The values stated in SI units are to be regarded as standard; inch-pound units, which are provided for information, are approximations.
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Designation:D 4596–99 (Reapproved 2004)
Standard Practice for
Collection of Channel Samples of Coal in a Mine
This standard is issued under the fixed designation D 4596; 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 sentative cross section of the coal bed at the point of sampling.
Channel samples are taken for subsequent testing needed for
1.1 This practice describes procedures for collecting a coal
evaluation of coal quality and characterization for commercial
samplefromachannelextendingfromtoptobottomintheface
evaluations, for planning of mining operations to maintain coal
of a coal seam in a mine.
quality, for the determination of coal rank in accordance with
1.2 This standard does not purport to address all of the
Classification D 388, and for geologic coal resource studies.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 1—Because of the potential for lateral variability, a sample may
priate safety and health practices and determine the applica-
not represent the quality of the coal bed at another sample point. The
reliability of the data generated from channel samples is dependent on the
bility of regulatory limitations prior to use. For specific
number and spacing of the sample points and the variability of the coal
precautionary information, see Note 2.
characteristics in a given area.
1.3 The values stated in SI units are to be regarded as
NOTE 2—Sampling of the mine product for these purposes is unsatis-
standard; inch-pound units, which are provided for informa-
factory because of contamination of the product with out-of-seam mate-
tion, are approximations.
rial, selective mining of parts of a seam, inability to obtain samples from
one or more specific locations in the mine, or other incompatibility of the
2. Referenced Documents
purpose of sampling with the mining practice. Conversely, channel
samples should not be used for evaluation of the quality of commercial
2.1 ASTM Standards:
shipments of the mine product, which should be sampled in accordance
D 121 Terminology of Coal and Coke
with Methods D 2234.
D 388 Classification of Coals by Rank
D 2234/D 2234M Practice for Collection of a Gross Sample
5. Apparatus
of Coal
5.1 Steel Measuring Tape, not less than3m(8ft) long.
D 2796 Terminology Relating to Megascopic Description
5.2 Miner’s Pick or Similar Tool, with file for sharpening.
of Coal and Coal Seams and Microscopical Description
Other devices may be used such as a pneumatically operated
and Analysis of Coal
chain saw with tungsten carbide teeth.
D 4371 Test Method for Determining the Washability Char-
5.3 Brush or Broom, for removing loose particles on the
acteristics of Coal
coal face.
5.4 Chalk.
3. Summary of Practice
5.5 Sample Containers With Closures—If the sample is to
3.1 At selected sites in the mine the face of the seam is
be used for determination of inherent moisture, the container
cleaned of weathered coal and debris and the face is evened.A
shall be such that less than 0.05 % of the sample weight is lost
channel of uniform horizontal cross section is cut from the coal
between the time of sealing the container with sample and the
seam and the coal therefrom is collected for analysis and
time of opening for preparation of the sample for analysis.
testing.
Steelairtightcontainerswithpolyethylenebaglinershavebeen
found to be satisfactory for this purpose. For other purposes,
4. Significance and Use
bags made of a strong cloth and lined with a polyethylene bag
4.1 A properly collected face channel sample that includes
may be suitable.
the total coal bed interval provides a sample that is a repre-
5.6 Ground Cloth—Canvas tarpaulin or heavy-duty plastic
sheet about 3 by 3 m (10 by 10 ft). If the purpose of sampling
This practice is under the jurisdiction of ASTM Committee D05 on Coal and
includes the determination of inherent moisture, the sheet shall
Coke and is the direct responsibility of Subcommittee D05.18 on Classification.
be of low water solubility and permeability, such as polyeth-
Current edition approved April 1, 2004. Published May 2004. Originally
ylene or oilcloth.
publishedapprovedin1986.Lastpreviouseditionapprovedin1999asD 4596 – 99.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5.7 Tags and Pen,for sample identification and for marking.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.8 Shovel.
Standards volume information, refer to the standard’s Document Summary page on
5.9 Notebook and Pencil,orothermeansforrecordkeeping.
the ASTM website.
Withdrawn.
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D 4596–99 (2004)
6. Planning of Sampling moisture-holding capacity, and oxygen content of high volatile
C bituminous and lower rank coals, and the rheological
6.1 Sampling Plan for Classification According to Rank:
properties of coking coals do change with weathering. Sam-
6.1.1 Refer to Section 7 of Classification D 388 for infor-
pling to different depths and testing of such properties may be
mation on the required number and location of samples.
required to establish the depth at which unweathered coal can
6.1.2 The channel size shall be at least 8 cm (3 in.) deep and
be obtained.
10 cm (4 in.) wide, and shall yield at least 3 kg (6 lb) of coal
for each foot of thickness of coal seam.
7. Sampling Procedures
6.1.3 All roof and floor rock, minera
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