GB/T 23561.4-2009Methods for determining the physical and mechanical properties of coal and rock - Part 4: Methods for calculating the porosity of coal and rock (English PDF)
煤和岩石物理力学性质测定方法 第4部分：煤和岩石孔隙率计算方法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 23561.4-2009 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 8, 2009
Implementation date
December 1, 2009
Scope
GB/T 23561.4-2009 is the English-translated version of 煤和岩石物理力学性质测定方法 第4部分：煤和岩石孔隙率计算方法.
GB/T 23561.4-2009 is the Chinese standard "Methods for determining the physical and mechanical properties of coal and rock - Part 4: Methods for calculating the porosity of coal and rock".
Its scope clause reads: This part of GB/T 23561 specifies the terms and definitions for the calculation of coal and rock porosity, the total porosity of coal and rock (that is, including the opening The calculation method of coal and rock effective porosity (that is, open porosity).
This part is applicable to the calculation of coal and rock porosity, and the calculation of effective porosity is applicable to the conditions that do not disintegrate when exposed to water and do not change in volume. of test pieces.
Its clauses include terms and definitions; calculation method of coal or rock total porosity; determination of coal or rock effective porosity.
Found what you need?
Document preview — GB/T 23561.4-2009
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 Calculation method of coal or rock total porosity
- 5 Determination of coal or rock effective porosity
1 Scope
This part of GB/T 23561 specifies the terms and definitions for the calculation of coal and rock porosity, the total porosity of coal and rock (that is, including the opening
The calculation method of coal and rock effective porosity (that is, open porosity).
This part is applicable to the calculation of coal and rock porosity, and the calculation of effective porosity is applicable to the conditions that do not disintegrate when exposed to water and do not change in volume.
of test pieces.
2 Normative references
The terms in the following documents become the terms of this part through the reference of this part of GB/T 23561.All dated citations documents, all subsequent amendments (excluding errata content) or revisions do not apply to this section, however, it is encouraged to reach
The parties to the agreement research the availability of the latest versions of these documents. For undated reference documents, the latest version applies to this part.
GB/T 23561.2-2009 Determination of physical and mechanical properties of coal and rock Part 2.Determination of true density of coal and rock
GB/T 23561.3-2009 Methods for Determination of Physical and Mechanical Properties of Coal and Rock Part 3.Determination of Density of Coal and Rock Blocks
GB/T 23561.5-2009 Determination of physical and mechanical properties of coal and rock Part 5.Determination of water absorption of coal and rock
3 Terms and Definitions
The following terms and definitions apply to this part of GB/T 23561.
4 Calculation method of coal or rock total porosity
Calculate the total porosity of coal or rock according to formula (1).
5 Determination of coal or rock effective porosity
Since the value of effective porosity of coal or rock is equal to the value of forced (saturated) water absorption of coal or rock, it can be calculated according to GB/T 23561.5-
2009 to measure the forced water absorption q of coal or rock, then there is formula (2).
......
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
Similar standards
How to Download GB/T 23561.4-2009
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
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
Secure payment via Stripe
Payments accepted
GB/T 23561.4-2009
$90.00