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NB/T 10728-2021: Technical specification for paste filling roadway retaining in coal mine
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| NB/T 10728-2021 | English | 269 |
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Technical specification for paste filling roadway retaining in coal mine
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NB/T 10728-2021
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PDF similar to NB/T 10728-2021
Standard similar to NB/T 10728-2021 YS/T 514.1 MT/T 1091 NB/T 51022 Basic data | Standard 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
foreword
This 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 retaining
1 Scope
This 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 references
The 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 backfill
3 Terms and Definitions
The 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 requirements
4.1 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.
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