What does this research mean for the field?

In low-rank coal mining, the dissipation zone—rather than the traditionally targeted oxidation zone—is the primary source of carbon monoxide generation at ambient temperatures, explaining the failure of conventional inerting measures. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate the mechanisms causing persistent carbon monoxide overlimit at the upper corner of low-rank coal working faces and optimize nitrogen inerting strategies.

August 30, 2026Combustion Science and Technology

Mechanism of Persistent CO Overlimit at the Upper Corner in Low-Rank Coal Mining Under Conventional Goaf Oxidation Prevention Measures: A Case Study of Nitrogen Injection

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Authors

LLLei Li JWJing Wang SYSu Yang

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Overview

Mathematical modeling study reveals that ambient dissipation zone oxidation drives carbon monoxide accumulation in low-rank coal goafs, highlighting the need for dual-point nitrogen injection.

Key Points

Investigate the mechanisms causing persistent carbon monoxide overlimit at the upper corner of low-rank coal working faces and optimize nitrogen inerting strategies.
Constructed a mathematical model simulating low-rank coal oxidation at ambient temperatures based on the 130X working face of Dananhu No.1 Coal Mine.
Simulated single-point versus dual-point nitrogen injection regimes to track oxygen consumption alongside carbon monoxide generation and migration dynamics.
Single-point nitrogen injection failed to control carbon monoxide accumulation, whereas dual-point injection at 10 m and 20 m along the intake gateway lowered gas concentrations.
Oxygen concentration drove gas generation, revealing that the high-permeability, oxygen-rich dissipation zone acts as the primary carbon monoxide source rather than the interior oxidation zone.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0b06c1a8fb52e79cfd7 https://doi.org/10.1080/00102202.2026.2723942

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August 30, 2026Combustion Science and Technology

Mechanism of Persistent CO Overlimit at the Upper Corner in Low-Rank Coal Mining Under Conventional Goaf Oxidation Prevention Measures: A Case Study of Nitrogen Injection

View Full Paper

Ask AI

Bookmark

Authors

LLLei Li JWJing Wang SYSu Yang

Discussion

Member takes

Overview

Mathematical modeling study reveals that ambient dissipation zone oxidation drives carbon monoxide accumulation in low-rank coal goafs, highlighting the need for dual-point nitrogen injection.

Key Points

Investigate the mechanisms causing persistent carbon monoxide overlimit at the upper corner of low-rank coal working faces and optimize nitrogen inerting strategies.
Constructed a mathematical model simulating low-rank coal oxidation at ambient temperatures based on the 130X working face of Dananhu No.1 Coal Mine.
Simulated single-point versus dual-point nitrogen injection regimes to track oxygen consumption alongside carbon monoxide generation and migration dynamics.
Single-point nitrogen injection failed to control carbon monoxide accumulation, whereas dual-point injection at 10 m and 20 m along the intake gateway lowered gas concentrations.
Oxygen concentration drove gas generation, revealing that the high-permeability, oxygen-rich dissipation zone acts as the primary carbon monoxide source rather than the interior oxidation zone.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0b06c1a8fb52e79cfd7 https://doi.org/10.1080/00102202.2026.2723942

View Full Paper

Ask AI

Bookmark