An experimental study on the law of methane outflow in coal face

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2008,（3）
• 页码范围: 453-457
• 页数: 5页
• 语种: 英文

摘要

Work face 3312 of coal mining in a colliery was taken as an example in whichmethane data in a series of locations was analyzed. For the purpose of data analysis,work face 3312 was divided into sections with 20 powered supports and some measur-ing-points in a section. Through analysis based on the sectional control volume model, thefollowing points are concluded: (1) the location of gob air flow begins flow into coal face in70 m away from the haulage gallery; (2) in the control volumes No.10 and No.30, the ra-tios of methane intensity from coal face into gob to the methane intensity in the corre-sponding control volume are 30% and 22%; (3) in the control volume No.50 to No.110, theratios of methane intensity from gob into coal face to the methane intensity in the corre-sponding control volume are 4%, 17%, 22% and 53%, respectively.