GB/T 23561.7-2009Methods for determining the physical and mechanical properties of coal and rock - Part 7: Methods for determining the uniaxial compressive strength and counting softening coefficient (English PDF)
煤和岩石物理力学性质测定方法 第7部分：单轴抗压强度测定及软化系数计算方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 8, 2009
Implementation date
December 1, 2009
Scope
GB/T 23561.7-2009 is the English-translated version of 煤和岩石物理力学性质测定方法 第7部分：单轴抗压强度测定及软化系数计算方法.
GB/T 23561.7-2009 is the Chinese standard "Methods for determining the physical and mechanical properties of coal and rock - Part 7: Methods for determining the uniaxial compressive strength and counting softening coefficient".
Its scope clause reads: This section GB/T 23561 specifies the terms and definitions of coal and uniaxial compressive strength and determination of the softening factor involved in the calculations, Equipment, specimen size, test procedures and data calculation.
This section applies under laboratory conditions, it can be processed into standard test pieces and coal seams associated with formation of rock uniaxial compressive strength Calculation and determination of softening coefficient. Its clauses include terms and definitions; equipment.
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Document preview — GB/T 23561.7-2009
National Standard of the People's Republic of China
- ICS
- 73.010
- Classification
- D 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Equipment
1 Scope
This section GB/T 23561 specifies the terms and definitions of coal and uniaxial compressive strength and determination of the softening factor involved in the calculations,
Equipment, specimen size, test procedures and data calculation.
This section applies under laboratory conditions, it can be processed into standard test pieces and coal seams associated with formation of rock uniaxial compressive strength
Calculation and determination of softening coefficient.
2 Normative references
The following documents contain provisions which, through reference GB/T 23561 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 23561.3-2009 physical and mechanical properties of coal and rock measuring method - Part 3. coal and rock bulk density determination
3 Terms and Definitions
The following terms and definitions apply to this part of the GB/T 23561 of.
3.1
Under laboratory conditions, coal (or rock) standard specimens under uniaxial compression state bear its failure load bearing surface area ratio.
3.2
Uniaxial compressive strength of coal (or rock) water saturated specimen and dried specimens or natural water content specimen uniaxial compressive strength ratio.
4 Equipment
4.1 Processing Machinery
Diamond machine, sawing machine, grindstone or grinding machines.
4.2 inspection tool
Specimen test tools are.
a) vernier caliper, minimum scale value 0.02mm;
b) Universal angle gauge, dial indicator holder and dial indicator;
c) the level of detection units.
4.3 Device
4.3.1 Testing Machine
Material testing machine accuracy should not be less than one. Load range should satisfy the formula (1).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 23561.8-2024Methods for determining the physical and mechanical properties of coal and rock - Part 8: Methods for determining the deformation parameters of coal and rock
- NB/T 11540-2024Methods for the determination of coal and rock abrasion resistance
- NB/T 11262-2023Classification indexes and roadside support modes of gob-side entry in coal mine
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Related Standards
GB/T 23561.1-2024 — Methods for determining the physical and mechanical properties of coal and rock - Part 1: General requirements for sampling
GB/T 23561.10-2010 — Methods for determining the physical and mechanical properties of coal and rock - Part 10: Methods for determining tensile strength of coal and rock
GB/T 23561.11-2024 — Methods for determining the physical and mechanical properties of coal and rock - Part 11: Methods for determining shear strength of coal and rock
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