NB/T 11646-2024Method of monitoring and early warning for spontaneous combustion in gobs of underground coal mine working face (English PDF)

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.

1 Scope

This document specifies the general provisions, monitoring technology, early warning technology and methods for monitoring and early warning of spontaneous combustion in goaf areas of coal mining working faces in underground coal mines.

Techniques and conditions for determining the "three zones" of spontaneous combustion in goaf areas, etc.

This document is applicable to the monitoring and early warning of spontaneous combustion in goaf areas of coal mining faces in underground 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. document.

GB/T 15663.8 Coal Mine Scientific and Technological Terminology Part 8: Coal Mine Safety

KA/T 1019 Gas chromatography analysis of spontaneous combustion in coal seams and index selection method

MT/T 757 General technical requirements for spontaneous combustion bundle pipe monitoring system in coal mines

3 Terms and definitions

The terms and definitions defined in GB/T 15663.8 and the following apply to this document.

4 General Provisions

4.1 Coal mines should establish a system for predicting and forecasting spontaneous combustion in goaf areas, and dynamically grasp the potential spontaneous combustion hazards or spontaneous combustion situations in goaf areas.

4.2 When mining coal seams that are prone to spontaneous combustion or self-ignition, the gas concentration in the goaf of the coal mining face and the gas extraction pipeline should be monitored daily;

For coal-burning seams, spontaneous combustion monitoring of goaf areas should be carried out at least once a week.

4.3 Coal mines should establish a spontaneous combustion monitoring and early warning system, collect statistics on the changes in spontaneous combustion indicators, draw trend charts, and conduct spontaneous combustion monitoring and early warning.

Fire prediction. once a certain indicator is found to reach a critical value, a forecast should be made quickly.