1、Designation:D 6610 01Standard Practice forManual Sampling of Coal from Stockpiles1This standard is issued under the fixed designation D 6610;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parent
2、heses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for obtaining a manualgross sample from the surface2of coal stockpiles.Theseprocedures are used to provide gross samples f
3、or generallaboratory analysis and for estimating quality and total mois-ture.The gross sample is to be crushed and further prepared foranalysis in accordance with Method D 2013.Mechanicalequipment such as auger samplers and core drill rigs areaddressed by other guides(D 4916)or working papers.1.2 Th
4、e user is cautioned that samples of this type do notsatisfy the minimum requirements for probability sampling andas such cannot be used to draw statistical inferences about theprecision,standard error,or bias.1.3 This sampling method is intended for use only whensampling by more reliable methods tha
5、t provide a probabilitysample is not possible.1.4 The quantities stated in either acceptable SI units or ininch-pound units are regarded separately as standard.Thequantities stated in each system may not be exact equivalents;therefore,each system must be used independently of the other,without combi
6、ning quantities in any way.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prio
7、r to use.2.Referenced Documents2.1 ASTM Standards:D 2013 Method of Preparing Coal Samples for Analysis3D 2234 Practice for Collection of a Gross Sample of Coal3D 4749 Test Method for Performing Sieve Analysis of Coaland Designating Coal Size3D 4916 Guide for Mechanical Auger Sampling3E 105 Practice
8、for Probability Sampling of Materials43.Terminology3.1 Definitions:3.1.1 particle size segregation,nthe segregation of sizedparticles to specific areas as a result of the particles rolling,falling,or sliding down the sides of a pile or a result of thepeculiarities of a coal handling system used to b
9、uild the pile.3.1.2 stockpile,nmaterial stored or reserved in a stackedpile or heap.4.Summary of Practice4.1 This practice is limited to manual collection of sampleincrements of coal from the surface layer(s)of a coal stockpilefor the purpose of acquiring a gross sample.5.Significance and Use5.1 The
10、 guidelines,cautions,and suggested procedurespresented here are intended to provide uniform methods forcollection of manual samples from the surface layer(s)of coalstored in a stockpile,taking into account the wide variety ofconditions that may be encountered.5.2 These guidelines provide procedures
11、for collecting grosssamples from the surface layers of coal in a stockpile;thesesamples then being further processed to provide samples forrequired laboratory estimations.The use of this practice isconditional upon agreement among all interested parties con-cerning all relevant details of sample col
12、lection before sam-pling begins.These include,but are not limited to:lot size;number and mass of increments;the size,shape,and manipu-lation of the increment collection devices;location of incre-ment collection site or sites;circumstances under whichincrements are not to be collected or suspended;an
13、d safetyprecautions.It is preferable that such agreements be in writing.This practice provides instructions for sampling only the outerlayers of coal contained in a stockpile.The user is cautionedthat samples so obtained do not represent material below thepoint of penetration.6.Procedure6.1 Lot Size
14、All interested parties should agree to the size1This practice is under the jurisdiction of ASTM Committee D05 on Coal andCoke and is the direct responsibility of Subcommittee D05.23 on Sampling.Current edition approved June 10,2001.Published August 2001.Orginallypublished as D 6610-00.Last previous
15、edition D 6610-00.2Although reference is made to collecting sample increments from the surface ofthe coal stockpile,in reality the increments are collected from coal approximately 18in.(46 cm)below the exposed surface of the pile.3Annual Book of ASTM Standards,Vol 05.06.4Annual Book of ASTM Standard
16、s,Vol 14.02.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.of the lot to be represented by one gross sample beforesampling begins.6.2 InspectionBefore sampling a lot of coal using thismethod,a visual inspection for size distribution and possiblesize segregation within the stockpile should be performed.Notes should be made on the sampling log to reflect theseobservations.These notes could be useful in understandingdifferences of analy
