GB/T 23250-2009 English PDF

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GB/T 23250-2009: The direct method of determining coalbed gas content in the mine
Status: Valid

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Basic data

Standard ID: GB/T 23250-2009 (GB/T23250-2009)
Description (Translated English): The direct method of determining coalbed gas content in the mine
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D09
Classification of International Standard: 13.100
Word Count Estimation: 28,223
Date of Issue: 2009-03-11
Date of Implementation: 2009-11-01
Regulation (derived from): National Standard Approval Announcement 2009 No.2 (Total No.142)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the sampling method for direct determination of seam gas content downhole, determination of the amount of desorbed gas, loss of gas volume compensation method, gas volume measurement methods and calculations of residual coal seam gas content. This standard applies to the direct determination of the use of coal seam gas content of the coal mine desorption method. This standard does not apply to serious leaking drilling, gas ejected gas drilling and core content.

GB/T 23250-2009: The direct method of determining coalbed gas content in the mine

---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.
The direct method of determining coalbed gas content in the mine ICS 13.100 D09 National Standards of People's Republic of China Direct determination of underground coal seam gas content Posted 2009-03-11 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 2 Equipment Sample 2 5 6 measuring method and step 3 7 Data Processing 7 8 Determination Report 10 9 measurement results of the evaluation 11 Appendix A (informative) Sampling record 12 Annex B (informative) coal underground natural gas desorption amount recorded measured 13 Annex C (informative) degassing coal sample record table 14 Annex D (informative) Laboratory of coal sample desorption natural gas volume measurement record table 15 Annex E (informative) coal seam gas content measurement results are summarized in Table 16 Annex F (informative) gas analysis test report 17 Annex G (informative) coal seam gas content measurement report 18 Appendix H (informative) saturation vapor pressure at different temperatures 19 Annex I (informative) at different temperatures saturated brine saturated vapor pressure of 20

Foreword

The Standard Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H and Appendix I are informative appendix. The standard proposed by China Coal Industry Association. The standard by the China Coal Industry Association. This standard was drafted. Fushun Branch of Coal Science Research Institute, Coal Science Research Institute of Chongqing. The main drafters of this standard. Jiang Wenzhong, QIN Yu Jin, Zouyin Hui, Dong whole, Xuejun Feng, Wu Qiong, Zhang Qinghua, ZHANG Shu same. Direct determination of underground coal seam gas content

1 Scope

This standard specifies the method of sampling of coal seam gas content directly measured downhole, the amount of desorbed gas measurement method, the amount of compensation for the loss of gas Party France, residual gas quantity measuring method and calculation method of coal seam gas content. This standard applies to the determination of the direct use of coal mine gas content of coal desorption method. This standard does not apply to serious leaking drilling, gas drilling and core discharge gas content.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 212 industrial analysis of coal (GB/T 212-2008, ISO 11722.1999, NEQ) GB 474 coal sample preparation method (GB 474-2008, ISO 18283.2006, MOD) GB/T 3715 coal quality and coal analysis related terms (GB/T 3715-2007, ISO 1213-2.1992, NEQ) GB/T 13610 natural gas composition analysis by gas chromatography GB/T 15663.8 Coal Science and Technology Terminology - Part 8. Mine Safety AQ1026 CMM basic indicators Methane adsorption MT/T 752 Determination of coal (high pressure volumetric method)

3 Terms and definitions

GB/T 15663.8 well established in the following terms and definitions apply to this standard. 3.1 Under normal pressure, remaining in the coal after the coal sample desorption gas amount. 3.2 The amount of coal gas lost during the exposure to the desorption from the start of measurement. 3.3 Under negative pressure, pulverized coal before desorbed gas amount. 3.4 Under negative pressure, pulverized coal to gas volume more than 80% of the coal particle size is less than 0.25mm desorbed in a ball mill. 3.5 Under normal pressure, after underground coal sample desorption transported to the laboratory before crushing amount of desorbed gas. 3.6 Under normal pressure, pulverized coal to gas volume more than 95% coal particle size is less than 0.25mm desorbed in the mill. ......

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