NB/T 11433-2023 English PDF

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NB/T 11433-2023: Technical specification for short wall interval filling mining in coal mine
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Basic data

Standard ID: NB/T 11433-2023 (NB/T11433-2023)
Description (Translated English): Technical specification for short wall interval filling mining in coal mine
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: D15
Word Count Estimation: 14,157
Date of Issue: 2023-12-28
Date of Implementation: 2024-06-28
Issuing agency(ies): National Energy Administration

NB/T 11433-2023: Technical specification for short wall interval filling mining 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.
ICS 73.020 CCSD15 Energy Industry Standards of the People's Republic of China Technical specification for short wall interval filling mining in coal mines Released on 2023-12-28 2024-06-28 Implementation The National Energy Administration released

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Technical Requirements 2 5 Backfill mining process 2 6 Safety Technical Requirements 6 7 Surface deformation and underground mine pressure monitoring 7

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 Standardization Expert Group of China Coal Industry Association. This document was drafted by. Shandong Kanger Energy Technology Co., Ltd., China University of Mining and Technology, Zaozhuang Mining (Group) Co., Ltd., Shandong Provincial Backfill Mining Engineering Technology Research Center, Binxian Coal Co., Ltd., Xuzhou Qingjie Intelligent Mining Technology Co., Ltd., China Coal Industry Industry Association Productivity Promotion Center. The main drafters of this document are. Zhao Qingmin, Li Xiushan, Chang Qingliang, Lu Shouming, Wang Hongtao, Shi Xianyuan, Hu Jianjun, Xuan Zhaojun, Mou Guoli, Liu Chengmao, Bi Zhiqiang, Su Yanbing, Zhang Jianfeng, Wang Wenlin, Hu Pan, Sun Cong, Wang Xu, Yang Yu, Qiu Chengsheng, Xu Yajun, Jiao Shoujing, Lu Ping, Fan Chuan, Yang Yu, Li Guangzhao, Li Chengmeng, and Yang Yang. Technical specification for short wall interval filling mining in coal mines

1 Scope

This document specifies the general technical requirements for short-wall interval filling mining in coal mines, filling mining process flow, safety technical requirements, surface changes, Shape and underground mine pressure observation. This document applies to short wall interval filling mining method in coal mines.

2 Normative references

The contents of the following documents constitute the 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. GB/T 39834 Technical requirements for comprehensive mechanized paste bag filling coal mining NB/T 51018 Solid throwing filling method for coal mining working face NB/T 51022 Technical requirements for vertical feeding pipes for solid filling materials NB/T 51023 Technical requirements for self-weight feeding system of solid filling materials NB/T 51071 Monitoring technology and methods for coal mine paste filling Coal Mine Safety Regulations Specifications for coal pillars and compressed coal mining in buildings, water bodies, railways and main shafts

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Access roadway At the end of the mining tunnel, the air intake tunnel and the return air tunnel are connected to form a connecting tunnel with full wind pressure ventilation on the working face. Note. This is similar to the cutting of conventional fully mechanized mining face, except that no fully mechanized mining equipment is arranged in the connecting tunnel of the drift. 3.2 After the working face forms full wind pressure ventilation, the working face is divided into several groups parallel to the connecting tunnel of the drift, and each group is divided into several short wall strips. The coal is extracted one by one at a certain width using mining equipment and the goaf is filled. Note. The mining strip is required to form full wind pressure ventilation first, and then expand the side and pull the bottom to mine. 3.3 Short wall strip shortwalstrip The coal mining face is divided into several narrow strips parallel to the connecting tunnels of the drift. 3.4 Half height support When mining short wall strips, if the mining equipment cannot mine the full height at one time and the short wall strips need to be mined in layers, the coal seams on both sides are not supported. In this case, it cannot achieve self-stability and needs to be supported from the two shoulder angles of the short wall strip downward to a certain range. ......

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