NB/T 10727-2021Technical specification for paste filling mining in coal mine (English PDF)
煤矿膏体充填开采技术规范
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
November 16, 2021
Implementation date
February 16, 2022
Scope
NB/T 10727-2021 is the English-translated version of 煤矿膏体充填开采技术规范.
NB/T 10727-2021 is a technical specification for paste backfill mining in coal mines, where crushed coal gangue, fly ash, slag, construction waste, sand, loess or tailings are mixed with cementitious material and water and pumped into the goaf to control overburden movement.
It covers applicable conditions, system layout, the equipment of the filling working face including filling hydraulic supports, aggregate and paste preparation systems, process requirements, and monitoring of surface deformation and underground strata pressure.
Named applications are higher coal recovery, safe extraction of coal beneath buildings, railways and water bodies, recovery of coal left by room-and-pillar and strip mining, ecological protection of mining areas and harmless disposal of solid waste. Issued on 16 November 2021, it has applied since 16 February 2022.
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Document preview — NB/T 10727-2021
National Standard of the People's Republic of China
- Classification
- D 15
Issued by: National Energy Administration of the People's Republic of China
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 System layout
- 5 Composition of charging and mining equipment
- 6 Process Requirements
- 7 Surface deformation and underground mine pressure monitoring
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" Drafting.
1 Scope
This document specifies the applicable conditions, system layout, composition of filling and mining equipment, process requirements, surface deformation and Underground mine pressure monitoring and other requirements.
This document is applicable to improving the recovery rate of coal resources, the safe mining of "three downs and one up" coal pressing, and the recovery of room-and-pillar, strip and other legacy coal resources.
Source mining, ecological protection of mining areas; harmless treatment of solid wastes such as coal mine gangue reduction and construction waste.
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.
JB/T 13439-2018 Mine Piston Filling Pumping Machine
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Paste filling material
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 a composite material that is mixed with cementitious material and water (may contain additives or admixtures) in an appropriate proportion, uniformly stirred and then filled into the goaf.
3.2 Paste backfill mining
A coal mining technology that fills the paste filling material into the goaf to control the movement of the overlying strata.
3.3 Paste filling working face
It can realize the working face required by the cooperative operation of coal mining and paste filling.
3.4 Paste filling hydraulic support
Hydraulic support that can realize the cooperative operation requirements of coal mining and paste filling.
3.5 Aggregate preparation system
The filling paste is made by crushing or screening solid wastes such as coal gangue, slag, harmless construction waste or other aggregates. A system for aggregate grading requirements.
3.6 Paste preparation system
A system that measures, transports and stirs paste filling aggregates, cementitious materials, additives and water in proportion to make paste filling materials.
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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
Normative references
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