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NUMERICAL SIMULATION OF AIR LEAKAGE AND OXYGEN CONSUMPTION IN COAL PILLARE CLOSE TO COMPREHENSIVE COAL FACE WITH CAVING METHOD FOR TOP SEAM

Zongxiang Li, Ji‐Bo Wang

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Abstract

Numerical simulation method has been used to study the process of oxygen density consumption and for leakage flow in the partition coal pillars close to the goaf of comprehensive coal face with caving method for top seam. The equations of air leakage flow and seepage diffusion-consumption of oxygen density in the flowing field of coal pillar are derived. The dynamic process of air leakage flow and oxygen density distribution is revealed. Thus a new method is provided for analysing the sponta- neous combustion in the loose coal pillar and determining the depth of the dangerous zone of spontaneous combustion.

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What this paper is about

Numerical simulation method has been used to study the process of oxygen density consumption and for leakage flow in the partition coal pillars close to the goaf of comprehensive coal face with caving method for top seam. The equations of air leakage flow and seepage diffusion-consumption of oxygen density in the flowing field of coal pillar are derived. The dynamic process of air leakage flow and oxygen density distribution is revealed. Thus a new method is provided for analysing the sponta- neous combustion in the loose coal pillar and determining the depth of the dangerous zone of spontaneous combustion.

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Available abstract

Numerical simulation method has been used to study the process of oxygen density consumption and for leakage flow in the partition coal pillars close to the goaf of comprehensive coal face with caving method for top seam. The equations of air leakage flow and seepage diffusion-consumption of oxygen density in the flowing field of coal pillar are derived. The dynamic process of air leakage flow and oxygen density distribution is revealed. Thus a new method is provided for analysing the sponta- neous combustion in the loose coal pillar and determining the depth of the dangerous zone of spontaneous combustion.

Key concepts: Coal, Spontaneous combustion, Leakage (economics), Computer simulation, Airflow, Pillar, Oxygen, Coal mining

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NUMERICAL SIMULATION OF AIR LEAKAGE AND OXYGEN CONSUMPTION IN COAL PILLARE CLOSE TO COMPREHENSIVE COAL FACE WITH CAVING METHOD FOR TOP SEAM — Research Paper | ScholarLens