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NB/T 11540-2024: Methods for the determination of coal and rock abrasion resistance
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| NB/T 11540-2024 | English | 139 |
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Methods for the determination of coal and rock abrasion resistance
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NB/T 11540-2024
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Basic data | Standard ID | NB/T 11540-2024 (NB/T11540-2024) | | Description (Translated English) | Methods for the determination of coal and rock abrasion resistance | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | D09 | | Classification of International Standard | 73.010 | | Word Count Estimation | 6,680 | | Date of Issue | 2024-05-24 | | Date of Implementation | 2024-11-24 | | Issuing agency(ies) | National Energy Administration | NB/T 11540-2024: Methods for the determination of coal and rock abrasion resistance---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 73.010
CCSD09
Energy Industry Standards of the People's Republic of China
Coal and rock - Determination of wear resistance
Released on 2024-05-24
Implementation on November 24, 2024
The National Energy Administration released
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents.
The institution does not bear responsibility for identifying patents.
This document was proposed by the China Coal Industry Association.
This document is under the jurisdiction of the Coal Industry Coal Mine Safety Standardization Technical Committee.
The drafting units of this document. Coal Science and Technology Research Institute Co., Ltd., Liaoning University of Engineering and Technology, and China University of Mining and Technology (Beijing).
The main drafters of this document are. Sun Zhongxue, Li Hongyan, Shu Longyong, Sun Weiji, Liu Bo, Li Dan, Liu Xue, Wang Bin, Tu Qi, Liu Yufeng, Mao Lingtao.
Coal and rock - Determination of wear resistance
1 Scope
This document specifies the instruments, equipment, specimens, test and measurement procedures for determining the wear resistance of coal and rock, the wear resistance index of coal and rock and
Grading, etc.
This document is applicable to the wear resistance test of coal and rock in the physical and mechanical properties test of coal and rock.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 23561.7-2009 Methods for determination of physical and mechanical properties of coal and rock Part 7.Determination of uniaxial compressive strength and softening coefficient
Number calculation method
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Abrasion resistance
The ability of a material to resist mechanical wear.
3.2
Rockwell hardness rockwel
HRC
The hardness value is determined by the depth of plastic deformation of the indentation.
3.3
ARI
10 times the average diameter (mm) of the worn test alloy steel needle tip.
4.Instruments and Equipment
4.1 Coal and rock abrasion resistance tester.
4.2 Alloy steel needle, the tensile strength of the alloy steel is 2GPa, the Rockwell hardness (HRC) is 54~56, the cone angle is 90°±0.5°, the needle tip is
Initial wear amount ≤10μm.
4.3 High-power microscope, with a measurement accuracy of not less than 0.0001 mm.
4.4 Diamond cutting machines and stone cutting machines.
4.5 Vernier caliper. accuracy is 0.02mm.
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