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NB/T 11529-2024Seismic-while-mining detection technology in coal mine working face (English PDF)

回采工作面随采地震探测技术

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

May 24, 2024

Implementation date

November 24, 2024

Scope

NB/T 11529-2024 is the English-translated version of 回采工作面随采地震探测技术.

NB/T 11529-2024 is the Chinese energy industry standard for seismic-while-mining detection on coal mining faces, a technique that takes the vibration of the shearer cutting the coal wall as the seismic source and records it on receiver lines laid in the roadways on both sides of the face.

It addresses data gathering, observation system design including the minimum face-to-receiver distance, acquisition equipment, installation and data collection, data processing with seismic interferometry, geological interpretation and submission of results.

Annexes outline the daily or weekly monitoring report and the final results report. The method serves real-time detection and monitoring of faults, collapse columns, fracture zones and relative stress distribution within the working face. Issued on 24 May 2024, it has applied since 24 November 2024.

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Document preview — NB/T 11529-2024

National Standard of the People's Republic of China

ICS: 73.020
Classification: D 10

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and definitions
4.Data Collection
5 Observation system design
6.Collection Equipment
7 Equipment installation and data collection
8 Data Processing
9 Geological interpretation
10.Submit your results
Appendix A (Informative) Daily (weekly) report of earthquake monitoring during mining
Appendix B (Informative) Outline of the report on the results of seismic monitoring of the mining face

1 Scope

This document specifies the data collection, observation system design, acquisition equipment, and equipment installation of seismic detection during mining in underground coal mines. and data collection, data processing, geological interpretation, and submission of results.

This document is applicable to the faults, collapse columns, fracture zones and relative stress distribution in the working face of underground coal mines. Real-time dynamic detection and monitoring.

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.

GB/T 3836.1 Explosive atmospheres Part 1: General requirements for equipment

GB/T 3836.2 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"

GB/T 3836.4 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"

GB 51145 Code for construction and acceptance of coal mine electrical equipment installation projects

SY/T 7372 Technical specification for microseismic ground monitoring

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Seismic-while-mining detection

The vibration generated by the coal mining machine when cutting the coal wall is used as the source of the earthquake. The receiving lines are laid in the tunnels on both sides of the working face to receive the signal.

The vibration data is collected and processed to detect and monitor the geological structure anomalies and relative stress distribution inside the mining face.

3.2 Effective wavefield

The virtual source equivalent wave field is extracted from the vibration signal excited by the coal mining machine source using seismic interferometry technology.

Note: Includes direct wave field and scattered wave field, which can be longitudinal wave, transverse wave or slot wave.

3.3 Minimum mining-face-receiver distance

The shortest distance between the survey line and the coal mining machine working face (see Figure 1).

3.4 Number of receiving points per side

During mining seismic monitoring, the number of measuring points set up in the tunnel on one side of the mining working face.

Collect geological, tunnel exposure and drilling data of the mining face and related areas. Including but not limited to the following information.

4 Data Collection

5 Observation system design

6 Collection Equipment

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.

7 Equipment installation and data collection

8 Data Processing

9 Geological interpretation

Appendix A (Informative) Daily (weekly) report of earthquake monitoring during mining Appendix B (Informative) Outline of the report on the results of seismic monitoring of the mining face […]

10 Submit your results

......
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

Similar standards

NB/T 11646-2024|NB/T 51030-2015|NB/T 11528-2024|GB/T 22205-2008|NB/T 11526-2024|NB/T 11458-2023

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