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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 41022-2021: Basic index of coal mine gas drainage and exploitation Status: Valid
Basic dataStandard ID: GB 41022-2021 (GB41022-2021)Description (Translated English): Basic index of coal mine gas drainage and exploitation Sector / Industry: National Standard Classification of Chinese Standard: D09 Word Count Estimation: 10,164 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB 41022-2021: Basic index of coal mine gas drainage and exploitation---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.Basic index of coal mine gas drainage and exploition ICS 13.100 CCSD09 National Standards of People's Republic of China Basic indicators of coal mine gas drainage Released on 2021-12-01 2022-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsForeword Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Coal mine gas drainage conditions 1 5 Basic index requirements for coal mine gas drainage 2 6 Measurement and calculation methods of indicators 3ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Standardized Structure Documents and Drafting Rules" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Mine Safety Supervision Bureau.IntroductionGas drainage is a fundamental measure to prevent coal mine gas accidents. There are a large number of coal mines in my country, and the severity of gas disasters varies greatly. There are different methods of gas management. It is important to determine the coal mines that must drain gas and the minimum standard for the gas extraction effect to curb coal mines. Important management requirements for gas accidents. In.2006, my country promulgated the compulsory industry standard "Basic Indicators of Coal Mine Gas Drainage" (AQ1026- 2006), which stipulates the mine conditions that must be used for gas drainage, the minimum index requirements that the gas drainage effect should meet, and the measurement and Calculation method. AQ1026-2006 has been implemented for more than ten years. With the development of new technologies and equipment for gas extraction, the "Coal Mine Safety Regulations" and The "Regulations on Prevention of Coal and Gas Outburst" have been revised, and related technologies and requirements have changed. Standardized by the State Council in January.2017 The Office of Coordinating and Promoting the Inter-ministerial Joint Conference issued a conclusion on the "compulsory standard integration and streamlining", and determined to upgrade AQ1026-2006 to Mandatory national standards. This document upgrades AQ1026-2006 "Basic Indicators of Coal Mine Gas Drainage" to a mandatory national standard, which is similar to AQ1026-2006 In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The "scope" was re-expressed based on the content of the document (see Chapter 1, Chapter 1 of AQ1026-2006); b) Added terms and definitions (see Chapter 3); c) Added the index requirements for the pre-drainage rate of surface wells in the first mining area of the prominent mine (see 5.1); d) The expression content of the control range is changed (see 5.2, 4.1 of AQ1026-2006); e) Deleted the expression that the wind speed of the mining face should not exceed 4m/s (see 5.4, 4.3 of AQ1026-2006); f) The calculation formula for coal seam gas pressure is changed (see 6.1, 5.1 of AQ1026-2006); g) Changed the expression content of the amount of gas drawn down in the mine gas drainage rate (see 6.5, 5.5 of AQ1026-2006); h) The calculation method of gas pre-drainage rate in surface wells has been added (see 6.7); i) Delete other expressions (see Chapter 6 of AQ1026-2006). Basic indicators of coal mine gas drainage1 ScopeThis document stipulates the conditions for coal mine gas drainage, the index requirements and index calculation methods that should be met by gas drainage. This document applies to mines and coal mines.2 Normative referencesThe content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 212 Coal Industrial Analysis Method GB/T 6949 Method for determination of apparent relative density of coal GB/T 23250 Direct measurement method of coal seam gas content underground GB/T 23561.4 Method for determination of physical and mechanical properties of coal and rock Part 4.Calculation method for porosity of coal and rock GB/T 31537 CBM (coal mine gas) terminology GB 40880 Coal Mine Gas Grade Appraisal Code GB 50471 Design standard for coal mine gas drainage engineering AQ/T 1047 Direct measurement method of coal seam gas pressure in underground coal mine MT/T 752 Method for measuring methane adsorption capacity of coal (high pressure volumetric method)3 Terms and definitionsGB/T 212, GB/T 23561.4, GB/T 31537, GB/T 6949 and AQ/T 1047, and the following terms and definitions are applicable Used in this document. 3.1 Residual gas content At 1 standard atmosphere pressure and temperature of 30℃, the amount of gas remaining in the coal sample after desorption. 3.2 Ground well Drilling holes constructed on the ground to extract gas from coal seams.4 Coal mine gas drainage conditionsCoal mines that meet one of the following conditions should conduct gas drainage. a) The gas emission of any coal mining face is greater than 5m3/min or the gas emission of any driving face is greater than 3m3/min, When the ventilation method is used to solve the gas problem unreasonably; b) The absolute gas emission of the mine meets the following conditions. 1) Not less than 40m3/min; ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 41022-2021_English be delivered?Answer: Upon your order, we will start to translate GB 41022-2021_English as soon as possible, and keep you informed of the progress. 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