Experiment study on the propagation laws of gas and coal dust explosion in coal mine

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2009,（3）
• 页码范围: 262-266
• 页数: 5页
• 语种: 英文
• DOI: 10.1007s12404-009-0309-0

摘要

The experiment of gas and coal dust explosion propagation in a single laneway was carried out in a large experimental roadway that is nearly the same with actual envi-ronment and geometry conditions. In the experiment, the time when the gas and coal dust explosion flame reaches test points has a logarithmic function relation with the test point distances. The explosion flame propagation velocity rises rapidly in the foreside of the coal dust segment and comes down after that. The length of the flame area is about 2 times that of the original coal dust accumulation area. Shock wave pressure comes down to the rock bottom in the coal dust segment, then reaches the maximum peak rapidly and comes down. The theoretical basis of the research and assemble of across or explosion is sup-plied by the experiment conclusion. Compared with gas explosion, the force and destruc-tion degree of gas and coal dust explosion is much larger.