Method for testing evolution rule of surface active group of coal spontaneous combustion in gas atmosphere

CN121678586BActive Publication Date: 2026-06-09SHANGHAI SECOND POLYTECHNIC UNIVERSITY

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Filing Date: 2026-02-09
Publication Date: 2026-06-09

AI Technical Summary

Technical Problem

Existing technologies for testing the evolution of active groups on the surface of coal during spontaneous combustion under gas atmospheres are insufficient to characterize the dynamic response differences under varying atmosphere loading sequences and ratios. Band analysis is conducted in isolation at temperature nodes, lacking a continuous correlation between surface behavior and functional group changes. This affects the accuracy of understanding and identifying the evolution of active groups during coal spontaneous combustion, and limits the decision-making support capabilities for coal mine safety assessments and underground fire early warning.

Method used

By acquiring the information on the order and ratio of atmosphere injection after coal sample loading, surface images and particle state changes are collected, airflow paths and particle migration are analyzed, the location and structure of spectral band changes are identified, behavioral changes during the heating process are tracked, a continuous trajectory of functional group evolution is constructed, and structured behavioral evolution path information is output by combining dynamic changes in spectral bands and particle behavioral trajectory data.

Benefits of technology

It improves the systematicness and stability of determining the evolution sequence and trend of active groups during coal spontaneous combustion, and can be used for auxiliary analysis of coal seam spontaneous combustion sensitivity zoning and fire source identification under different atmospheric conditions in coal mines, thereby improving the accuracy of spontaneous combustion risk identification.

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Abstract

The present application relates to the technical field of coal analysis, in particular to a testing method for evolution law of coal spontaneous combustion surface active group under gas atmosphere, comprising the following steps: obtaining loading atmosphere sequence and ratio difference of coal sample, collecting surface image and particle state, analyzing airflow path and adhesion range, screening response feature set, collecting spectral band atlas, dividing behavior change section, and obtaining evolution behavior trajectory structure set. In the present application, the surface adhesion distribution and particle migration behavior of coal sample in the process of differentiated gas atmosphere loading are continuously collected and compared, the corresponding relationship between behavior characteristics and atmosphere conditions is introduced, the spectral evolution and surface response path are synchronously tracked in the process of temperature rise, the spectral band change can form a complete link along the time and temperature zone dimensions, the continuous trajectory of functional group evolution is constructed by identifying the shrinkage drift and rollback behavior breakpoint of spectral band, and the systematicness and stability of the determination of active group evolution sequence and trend in the process of coal spontaneous combustion are improved.

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