GB/T 482-2008Sampling of coal seams (English PDF)

GB/T 482-2008 is the English-translated version of 煤层煤样采取方法.

GB/T 482-2008 lays down how coal seam samples are to be taken: clause 1 states that the standard specifies the sampling of coal seams and that it applies to the sampling of lignite, bituminous and anthracite seams.

Its table of contents names clause 4 General, clause 5 Sampling apparatus, clause 6 Sampling procedure, clause 7 Sample preparation and check of workable seam-sample, clause 8 Test of coal seam-sample and clause 9 Result report, followed by Appendix A with calculation examples, Appendix B with the coal seam-sample report form and a normative Appendix C giving the columnar legend.

Clause 3 defines the coal seam-sample as the sample taken from a seam at a mining face, exploration roadway or tunnel according to the rules, and the stratified seam-sample as the sample taken separately from each natural stratification of coal and from each stone band.

Clause 4 fixes the conditions and the frequency: samples are taken in mine excavation roadways and at the stope face, at places where the geological structure is normal, though a seam badly disturbed by structure is still sampled when it must be; the surface oxide layer is peeled off beforehand; stratified and workable seam-samples are taken at the same time; the coal quality management department does the sampling, with the location settled jointly with the geological department in special cases, and the work follows the Coal Mine Safety Regulations; for open-pit mines the standard applies up to a working bench height of 3.00 m, above which a coal core may be drilled out with a rotary rig as the workable seam-sample.

The same clause requires at least one sample for every 100 to 500 m of advance at a main roadway heading, and at least one per quarter at a stope face, with one sample for faces under 100 m, two for 100 to 200 m and three for faces over 200 m, and more where the seam structure is complex and the coal quality varies.

Clause 5 calls for a pick with a flat head and a point or a suitable sampling machine, and clause 6 sets out the procedure, from marking and measuring each natural stratification and recording its lithology and thickness to catching the cut coal on a spreading cloth, bagging and labelling each stratification separately, taking a stone band no thicker than 0.03 m in with the adjacent coal, and numbering the stratified and workable seam-samples by seam.

Clause 8 requires moisture, ash and true relative density on stratified seam-samples, and, once the representativeness of a workable seam-sample has been checked, proximate analysis along with total moisture, total sulfur, calorific value and true relative density, with at least two representative samples per seam each year made up into raw coal and float coal samples in accordance with GB 474 and with thickness, ash and true relative density reported to two decimal places.

Clause 9 lists what the report must carry, including the report number, the sampling and filling dates, the names of sampler, preparer, reviewer and approver, the seam information, the sampling location, the working face conditions and the seam thicknesses with their dry basis ash values.

It replaces GB 482-1995, was issued on 29 July 2008 and has applied since 1 May 2009.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.

GB/T 16658-2026|GB/T 15663.1-2025|GB/T 19560-2025|GB/T 24504-2025|GB/T 46288-2025|GB/T 46289-2025

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