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GB/T 23561.12-2024 English PDF

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GB/T 23561.12-2024: Methods for determining the physical and mechanical properties of coal and rock - Part 12: Method for the determination coal hardiness coefficients
Status: Valid

GB/T 23561.12: Evolution and historical versions

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GB/T 23561.12-2024English319 Add to Cart 4 days [Need to translate] Methods for determining the physical and mechanical properties of coal and rock - Part 12: Method for the determination coal hardiness coefficients Valid GB/T 23561.12-2024
GB/T 23561.12-2010English139 Add to Cart 3 days [Need to translate] Methods for determining the physical and mechanical properties of coal and rock -- Part 12: Methods for determining coal hardiness coefficient Valid GB/T 23561.12-2010

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Basic data

Standard ID GB/T 23561.12-2024 (GB/T23561.12-2024)
Description (Translated English) Methods for determining the physical and mechanical properties of coal and rock - Part 12: Method for the determination coal hardiness coefficients
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D04
Classification of International Standard 73.010
Word Count Estimation 16,199
Date of Issue 2024-08-23
Date of Implementation 2024-08-23
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 23561.12-2024: Methods for determining the physical and mechanical properties of coal and rock - Part 12: Method for the determination coal hardiness coefficients


---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.
Methods for determining the physical and mechanical properties of coal and rock - Part 12.Method for the determination coal hardiness coefficients Determination methods of physical and mechanical properties of coal and rock Part 12.Method for determination of solidity coefficient of coal Methods for determining the physical and mechanical properties of coal and rock-Part 12.Method for the determination coal hardiness coefficients ICS 73.010 CCS D 04 National Standard of the People's Republic of China Replaces GB/T 23561.12-2010 Released on 2024-08-23 2025-03-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... Ⅲ Introduction Ⅳ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 4 Instruments and Equipment ... 1 5 Specimen Specifications ... 3 6 Measurement steps ... 4 7 Data Calculation ... 4 Appendix A (Normative) Coal Solidity Coefficient Determination Record Sheet ... 5 References ... 6

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 is required. This document is part 12 of GB/T 23561 "Determination of physical and mechanical properties of coal and rock". GB/T 23561 has been published The following parts. --Part 1.General provisions for sampling; -- Part 2.Method for determination of true density of coal and rock; -- Part 3.Method for determination of density of coal and rock masses; -- Part 4.Calculation method of porosity of coal and rock; -- Part 5.Determination of water absorption of coal and rock; -- Part 6.Determination of moisture content in coal and rock; -- Part 7.Determination of uniaxial compressive strength and calculation method of softening coefficient; -- Part 8.Determination methods of deformation parameters of coal and rock; -- Part 9.Methods for determination of triaxial strength and deformation parameters of coal and rock; -- Part 10.Method for determination of tensile strength of coal and rock; -- Part 11.Methods for determination of shear strength of coal and rock; -- Part 12.Method for determination of solidity coefficient of coal; -- Part 13.Method for determination of point load strength index of coal and rock; -- Part 14.Method for determination of rock expansion rate; -- Part 15.Method for determination of expansion stress in rocks; -- Part 16.Method for determination of rock disintegration resistance index. This document replaces GB/T 23561.12-2010 "Methods for determination of physical and mechanical properties of coal and rock Part 12.Coal strength system Compared with GB/T 23561.12-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been increased (see Chapter 1); b) Changed the order of the apertures of the sample sieves in the instrument (see Chapter 4, Chapter 3 of the.2010 edition); c) Added the requirements for plastic wrapping of sealing materials (see 5.1); d) Added the step of inspecting the crushing cylinder before testing (see 6.1); e) Added data calculation provisions for "when the size of the coal sample does not meet the requirements (20mm~30mm)" (see 7.2). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the China Coal Industry Association. This document was drafted by. China Coal Science and Technology Research Institute Co., Ltd., China Coal Research Institute Co., Ltd., China Coal Technology and Engineering Mining Research Institute INN LIMITED. The main drafters of this document are. Sun Zhongxue, Li Hongyan, Shu Longyong, Li Yang, Zhang Huijie, Chi Nana, Mo Yunlong, Li Dan, Liu Bo, Liu X., Wang B., Qi Q.X., and Xia Y.X. This document was first published in.2010 and this is the first revision.

Introduction

GB/T 23561 aims to describe the method for determining the physical and mechanical parameters of coal and rock in the laboratory. The measurement requirements of the number are planned to consist of 16 parts. Part 1.General provisions for sampling. The purpose is to describe the determination of the basic physical and mechanical properties of coal and rock formations associated with coal seams. And the sampling method of coal and rock samples required for impact tendency determination. Part 2.Method for determination of true density of coal and rock. The purpose is to determine the true density of coal and rock using a pycnometer method or a gas expansion method true density analyzer. True density of coal and rock. Part 3.Method for determination of bulk density of coal and rock. The purpose is to determine the bulk density of coal and rock using the sealing method and the volumetric method. Part 4.Calculation method of porosity of coal and rock. The purpose is to determine the porosity of coal and rock. Part 5.Determination of water absorption of coal and rock. The purpose is to determine the water absorption of coal and rock that do not disintegrate, dissolve, shrink or swell when exposed to water. The water absorption of rocks. Part 6.Determination of moisture content of coal and rock. The purpose is to determine the moisture content of coal and rock by drying method. Part 7.Determination of uniaxial compressive strength and calculation method of softening coefficient. The purpose is to determine the Uniaxial compressive strength of rock and calculated softening coefficient. Part 8.Determination of deformation parameters of coal and rock. The purpose is to determine the uniaxial compression of coal and rock that can be processed into standard specimens. Deformation parameters under shrinkage conditions. Part 9.Method for determination of triaxial strength and deformation parameters of coal and rock. The purpose is to determine the triaxial strength and deformation parameters of coal and rock that can be processed into standard test pieces. Strength and deformation parameters of rocks under axisymmetric triaxial stress conditions. Part 10.Method for determination of tensile strength of coal and rock. The purpose is to determine the tensile strength of coal and rock that can be processed into standard test pieces. strength. Part 11.Method for determination of shear strength of coal and rock. The purpose is to determine the shear strength of coal and rock. Part 12.Method for determination of the solidity coefficient of coal. The purpose is to determine the solidity coefficient of coal. Part 13.Method for determination of point load strength index of coal and rock. The purpose is to determine the point load strength index of coal and rock. Part 14.Method for determination of rock expansion rate. The purpose is to determine the free expansion rate and the laterally restrained expansion rate of rock. - Part 15.Method for determination of swelling stress in rocks. The purpose is to determine the lateral restrained swelling stress in rocks. Part 16.Method for determination of rock disintegration resistance index. The purpose is to determine the disintegration resistance index of rocks that are prone to disintegration when exposed to water. Determination methods of physical and mechanical properties of coal and rock Part 12.Method for determination of solidity coefficient of coal

1 Scope

This document specifies the instrumentation, test piece specifications, measurement procedures and data calculation for determining the solidity coefficient of coal by the crushing method. This document is applicable to the determination and calculation of the solidity coefficient of coal when the coal sample size is 20 mm to 30 mm. When the size of coal is 20 mm to 30 mm, coal samples with a size of 1 mm to 3 mm can be used for measurement and calculation.

2 Normative references

This document has no normative references.

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Coal hardness coefficient A comprehensive indicator of coal's ability to resist destruction. [Source. GB/T 16414-2008, 2.21] 4.Instruments and Equipment The main instruments and equipment are. Mashing cylinder, see Figure 1; a)

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