GB/T 43215-2023 English PDF

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GB/T 43215-2023: Assessment methods for foundation stability of the surface construction above goaf
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Basic data

Standard ID: GB/T 43215-2023 (GB/T43215-2023)
Description (Translated English): Assessment methods for foundation stability of the surface construction above goaf
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D10
Classification of International Standard: 73.020
Word Count Estimation: 26,261
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 43215-2023: Assessment methods for foundation stability of the surface construction above goaf

---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 CCSD10 National Standards of People's Republic of China Stability assessment method for surface construction foundations in goaf areas Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 General requirements 2 4.1 Basic requirements 2 4.2 Division of work stages 3 4.3 Work content 3 5 working procedures 3 5.1 Preparation Phase 3 5.2 Current situation investigation and testing phase 3 5.3 Forecast evaluation stage 3 5.4 Report preparation stage 3 6 Assessment and Investigation Scope 4 6.1 Assessment Scope 4 6.2 Scope of investigation 4 7 Goaf survey 4 7.1 Goaf data 4 7.2 Hydrogeological conditions 4 7.3 Mining subsidence data 4 7.4 Construction data5 7.5 Proposed project information5 7.6 Rock mass physical and mechanical parameter data 5 7.7 Investigation methods 5 8 Surface movement deformation calculation and impact analysis 5 8.1 Calculation method 5 8.2 Calculation parameter selection 5 8.3 Calculation of surface movement deformation 6 8.4 Analysis of the influence of surface movement and deformation 6 9 Goaf foundation stability assessment 6 9.1 Basic Principle 6 9.2 Assessment Method 6 9.3 Discrimination method of surface movement deformation value 6 9.4 Goaf stability analysis method 7 9.5 Mine (rock) pillar stability analysis method 8 9.6 Fault structural stability assessment method 8 10 Construction site suitability assessment 8 10.1 Basic requirements 8 10.2 Assessment methods 8 10.3 Assessment Criteria 8 10.4 Allowable and ultimate surface deformation values of buildings (structures) 9 10.5 Assessment content 9 11 Prevention measures and deformation monitoring 9 11.1 Classification of prevention and control measures 9 11.2 Principles for selecting prevention and control measures 9 11.3 Goaf area management measures 9 11.4 Building protection measures10 11.5 Contents of prevention and control measures plan 10 11.6 Deformation monitoring 10 12 Results Submission 10 12.1 Result content10 12.2 Outcome requirements 10 Appendix A (normative) Allowable and ultimate ground surface (foundation) deformation reference values for buildings (structures), devices, etc. 11 Appendix B (Informative) Foundation Stability Assessment Report Example 16 Reference 18

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and coordinated by the China Coal Industry Association. This document was drafted by. Coal Science and Technology Research Institute Co., Ltd., Tiandi Technology Co., Ltd., China Coal Science and Technology Group Shenyang Design Research Institute Co., Ltd., Huaibei Mining (Group) Co., Ltd. The main drafters of this document. Zhang Junying, Jia Xinguo, Chen Qingtong, Hu Bingnan, Li Jie, Chen Kai, Guo Wenyan, Huang Leting, Sun Qingxian, Zhang Bin, Li Hongjie, Han Hongde, Wu Haijun, Lin Huili, Mou Yi, Dong Xianglin, Liu Zhifei, Li Wen, Liu Yixin, Deng Weinan, Li Wei, Wang Zhijie, Li Jianghua, Wang Yong, Bi Zhongwei, Fu Xingyu, Liu Xue, Li Ling, Ai Chang, Yan Jie, Wang Xuan, He Zhao. Stability assessment method for surface construction foundations in goaf areas

1 Scope

This document stipulates the overall requirements, work procedures, assessment and investigation scope, goaf area adjustment and stability assessment for surface construction foundations in goaf areas. Investigation, surface movement deformation calculation and impact analysis, goaf foundation stability assessment, construction site suitability assessment, prevention measures and deformation monitoring Requirements for testing and results submission. This document is applicable to the stability assessment of surface construction foundations in coal mine goafs, and can be used as a reference in non-coal mines based on specific circumstances.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 23561.1-2009 Methods for determination of physical and mechanical properties of coal and rock Part 1.General provisions for sampling GB 50007-2011 Code for design of building foundations GB 50009-2012 Code for load of building structures GB 50021-2001 Geotechnical Engineering Survey Code (2009 Edition) GB 50026 Engineering Measurement Standard GB/T 50123 Standard for geotechnical testing methods GB/T 50266 Standard for engineering rock mass testing methods GB 50330-2013 Technical specifications for building slope engineering GB 51044-2017 Code for geotechnical engineering investigation in coal mine goafs GB 51180-2016 Technical specifications for foundation treatment of buildings (structures) in goaf areas of coal mines JGJ8-2016 Specification for Measurement of Building Deformation

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 goaf area goal The space left behind after underground coal resources are mined in a certain way and the surrounding rock instability causes displacement, cracking, fragmentation and collapse of the entire space. Underground area space. 3.2 mining subsidence areaminingsubsidencearea The surface movement range above the goaf caused by underground mining and affected by mining shall be drawn according to the boundary angle or the 10mm subsidence isoline. Determine its scope. Note. The mining subsidence area is also called a surface moving basin or a surface subsidence basin. 3.3 After the movement of the ground surface stabilizes (the cumulative subsidence does not exceed 30mm for 6 consecutive months), from the time when new buildings (structures) are built on the ground surface, the under-construction ......

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