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NB/T 11536-2024: Technical specification for underground grouting and reinforcement retrofitting of floor of mining above confined aquifer in coal mines
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
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Technical specification for underground grouting and reinforcement retrofitting of floor of mining above confined aquifer in coal mines
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NB/T 11536-2024
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Basic data | Standard ID | NB/T 11536-2024 (NB/T11536-2024) | | Description (Translated English) | Technical specification for underground grouting and reinforcement retrofitting of floor of mining above confined aquifer in coal mines | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | D00 | | Classification of International Standard | 73.020 | | Word Count Estimation | 14,140 | | Date of Issue | 2024-05-24 | | Date of Implementation | 2024-11-24 | | Issuing agency(ies) | National Energy Administration | NB/T 11536-2024: Technical specification for underground grouting and reinforcement retrofitting of floor of mining above confined aquifer in coal mines
---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.
ICS 73.020
CCSD00/09
Energy Industry Standards of the People's Republic of China
Underground grouting reinforcement and transformation of coal mine floor under pressure mining
Technical Specifications
Released on 2024-05-24
Implementation on November 24, 2024
The National Energy Administration released
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Grouting reinforcement renovation scheme design 1
4.1 General Provisions 1
4.2 Drilling arrangement principles 2
4.3 Drilling layout design 2
4.4 Drilling structure design 2
4.5 Grouting treatment engineering design 3
5 Drilling and grouting construction 4
5.1 General Provisions 4
5.2 Drilling 4
5.3 Grouting 5
5.4 Sealing 5
6 Effect inspection and project acceptance 6
6.1 Effect test 6
6.2 Completion acceptance 6
6.3 Effect Evaluation 6
Appendix A (Informative) Underground Drilling Single Hole Acceptance Form 7
References 9
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 for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Coal Industry Association.
This document is under the jurisdiction of the Coal Industry Coal Mine Safety Standardization Technical Committee.
This document was drafted by. Henan Energy Group Co., Ltd., Jiaozuo Coal Industry (Group) Co., Ltd., Jiaozuo Coal Industry (Group) Xinxiang Energy
Source Co., Ltd., China University of Mining and Technology (Beijing), and Henan Polytechnic University.
The main drafters of this document are. Ma Zhenglan, Yang Heng, Jia Mingkui, Wei Shiyi, Zhao Shehui, Xin Xinping, Li Guodong, Li Zhenhua, Tang Shijie,
Zeng Yifan, Kan Xuedong, Liu Shiqi, Mu Songli, Li Xiaolei, Hou Dianchen, Han Jiufang, Zhang Cun, Li Xiaoer, Zhao Kai, Guo Dongyu.
Underground grouting reinforcement and transformation of coal mine floor under pressure mining
Technical Specifications
1 Scope
This document specifies the design of underground grouting reinforcement and reconstruction scheme for coal mine floor under pressure mining, drilling and grouting construction, effect inspection and engineering inspection.
Technical requirements for collection, etc.
This document is applicable to underground grouting reinforcement and grouting transformation of the bottom plate of coal mines with pressure mining.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
NB/T 51030-2015 Specification for construction and acceptance of grouting works in coal mine working faces
Detailed Rules for Coal Mine Water Prevention and Control (National Coal Mine Safety Monitoring Bureau)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Coal mining in an aquifer with confined water pressure.
3.2
The pressure of slurry input into the grouting hole at the end of grouting.
3.3
The minimum safe distance between the controlled range of the outermost water exploration drilling hole and the tunnel wall.
3.4
Final grouting volume final pump volume
The flow rate of the grouting pump at the end of grouting.
4 Grouting reinforcement renovation scheme design
4.1 General
4.1.1 When performing underground grouting reinforcement and reconstruction of the floor of a coal mine under pressure mining, the relevant provisions of the "Detailed Rules for Coal Mine Water Prevention and Control" should be implemented.
4.1.2 When the water inrush coefficient of the coal mining face is greater than 0.1 MPa/m, the face should be reinforced by full floor grouting.
When the water inrush coefficient is less than or equal to 0.1MPa/m and greater than 0.06MPa/m, the exploration of structural fracture zones and drilling and geophysical anomaly areas should be carried out.
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