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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. NB/T 10728-2021: Technical specification for paste filling roadway retaining in coal mine Status: Valid
Basic dataStandard ID: NB/T 10728-2021 (NB/T10728-2021)Description (Translated English): Technical specification for paste filling roadway retaining in coal mine Sector / Industry: Energy Industry Standard (Recommended) Classification of Chinese Standard: D18 Word Count Estimation: 11,125 Issuing agency(ies): National Energy Administration NB/T 10728-2021: Technical specification for paste filling roadway retaining in coal 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.Technical specification for paste filling roadway retaining in coal mine ICS 73.020 CCSD15 People's Republic of China Energy Industry Standard Technical specification for mining of coal mine paste filling entry retaining Published on 2021-11-16 2022-02-16 Implementation Released by the National Energy Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Technical requirements 1 5 Process flow 3 6 Main process control and safety technical requirements 4 7 Evaluation of filling mining effect 5 forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the Science and Technology Development Department of China Coal Industry Association. This document is drafted by. Shandong Kangge Energy Technology Co., Ltd., China University of Mining and Technology, Zibo Mining Group Co., Ltd. The main drafters of this document. Sun Xikui, Chang Qingliang, Cao Zhong, Zhao Qingmin, Sun Gang, Li Xiushan, Shi Xianyuan, Li Min, Guo Shougang, Chang Xiandong, Xuan Zhaojun, Xu Chunhua, Su Yanbing, Wu Dongliang. Technical specification for mining of coal mine paste filling entry retaining1 ScopeThis document specifies the technical requirements, technological process, main process control and safety technical requirements for the mining technology of coal mine paste filling and retaining. Filling mining effect evaluation, etc. This document is applicable to the mining of coal mine paste backfill entry retaining.2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 35056-2018 Technical Specification for Bolting Support of Coal Mine Roadway NB/T 51070-2017 Coal mine paste filling material test method NB/T 51071-2017 Monitoring technology and method of coal mine paste backfill3 Terms and DefinitionsThe following terms and definitions apply to this document. 3.1 pastefillingmaterial Materials such as coal gangue, fly ash, slag, harmless construction waste, aeolian sand, river sand, loess, tailings and other materials that will be broken during paste filling mining It is mixed with cementitious material and water (may contain additives or admixtures) in appropriate proportion, and filled into the goaf after uniform stirring without causing the downhole environment. Contaminated composites. 3.2 enrichmentrate The ratio of the volume of the backfill to the volume of the goaf, or the ratio of the average height of the backfill to the average mining height of the coal seam. 3.3 Initial slump initialslump The slump value of the prepared paste was measured immediately. 3.4 Initial settingtime initialsettingtime Refers to the time for the paste filling material to be stirred with water until it loses its fluidity. 3.5 paste-filingbody The solidified body of the paste filling material left in the gob.4 Technical requirements4.1 Requirements for roadway support The support of the roadway to be protected should be in good condition, with no gangway or empty roof, and the support should meet the requirements of GB/T 35056-2018. ...... |
