Statistical Analysis on Characteristics of Gas Emission in a Fully Mechanized Caving Face under Drainage Conditions

De Wen Li; Peng Wang; Jing Zhao Zhang

doi:10.4028/www.scientific.net/AMR.734-737.634

Paper Titles

Research on Sodium Removal from Zhundong Coal
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Research on the Equipment Addition of Antaibao Open-Pit Mine
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Research on the Simulation of the Roof Fracture about the Gob-Side Entry Retaining
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Risk Management of Induced Micro-Seismicity Caused by Hydraulic Fracturing through Acoustic Emission
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Statistical Analysis on Characteristics of Gas Emission in a Fully Mechanized Caving Face under Drainage Conditions
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Strata Behaviors of Fully-Mechanized Sublevel Caving Face Based on Similar Simulation Test
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Study on Fully-Mechanized Top Coal Caving Mining under Water Body with Shallow Overburden and Thin Bedrock
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Study on Methods of Exploring the Loosening Radius of Deep-Hole Controlling Blasting
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Study on Optimization Method of the Slope Angle Design for Open-Pit Mine
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 734-737Statistical Analysis on Characteristics of Gas...

Statistical Analysis on Characteristics of Gas Emission in a Fully Mechanized Caving Face under Drainage Conditions

Abstract:

Characteristics of gas emission in face 40108 were analyzed. The results show that the high-position tunnel system and the grouting system are the effective gas control systems, and 83% gas emission rates in face 40108 come from gob. When monitoring points away from coal face about 33-38m and 78-93m in strike direction, gob gas concentrations reach to 5% and 10%, respectively. The relative gas emission rates decrease with a negative exponential function when the daily outputs or daily advancing rates increase. With the increased air flow rate in face 40108, the absolute gas emission rates in return airway increase coinstantaneous, while it is almost remain unchanged in coal face.