1、Designation:D5192/D5192M22Standard Practice forCollection of Coal Samples from Core1This standard is issued under the fixed designation D5192/D5192M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice describes procedures for collecting andhandling a coal sample from a core recovered from a borehole.1.2 UnitsThe values stated in ei
3、ther SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,to ensure conformance with the standard,eachsystem shall be used independently of the other,and valuesfrom the two systems shall not be combine
4、d.1.3 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.
5、4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Tr
6、ade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD388 Classification of Coals by RankD1412 Test Method for Equilibrium Moisture of Coal at 96to 97 Percent Relative Humidity and 30 CD2013/D2013M Practice for Preparing Coal Samples forAnalysisD2796 Terminolo
7、gy for Megascopic Description of Coaland Coal Seams and Microscopical Description andAnalysis of Coal(Withdrawn 1995)3D4371 Test Method for Determining the Washability Char-acteristics of CoalD4596 Practice for Collection of Channel Samples of Coalin a Mine3.Terminology3.1 Definitions:3.1.1 For addi
8、tional definitions of terms,refer to Terminol-ogy D121.3.1.2 borehole,nthe circular hole through soil and rockstrata made by boring.3.1.3 caves or washouts,nzones of increased hole diam-eter caused by rock fragments that fall from the walls of aborehole and can block the hole or contaminate the cutt
9、ingsand which erode or abrade the sidewall of the borehole by theaction of the drilling.These zones can affect the accuracy ofcertain geophysical logs(especially density).Corrections toother geophysical logs can be made if a caliper log is available.The most common causes of caves or washouts includ
10、e soft orfractured 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 theborehole.3.1.4 concretion,nin a geological sense,a mass of min-eral matter found in rock of a composit
11、ion different from itsown and produced by deposition from aqueous solution in therock.3.1.5 core,nin drilling,a cylindrical section of rock(coal)that is usually 5 to 10 cm in diameter,taken as part of theinterval penetrated by a core bit and brought to the surface forgeologic examination,representat
12、ive sampling,and laboratoryanalyses.3.1.6 core barrels,ntwo nested tubes above the bit of acore drill,the outer rotating with the bit,the inner receiving andpreserving a continuous section or core of the material pen-etrated.The following two types of inner barrels are commonlyused.3.1.6.1 split-tub
13、e barrel,na type of inner barrel consistingof two longitudinal halves of pipe bound together by reinforcedtape at intervals along the barrel length that allows easy accessto a relatively intact core(by cutting the tape).(This is thepreferred barrel type for coal exploration,when available.)1This pra
14、ctice 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 May 15,2022.Published June 2022.Originallyapproved in 1991.Last previous edition approved in 2015 as D5192 09(2015).DOI:10.1520/D5192_D51
15、92M-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is r
16、eferenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TB
