突出过程中煤—瓦斯两相流运移规律的实验研究

摘要

In order to deeply probe the coal-gas migration rule in the roadway in the process of coal and gas outburst,experimental study was carried out on the migration rule of coal-gas flow in the process of outburst in the "H"-type roadway by using the self-developed simulation experiment device of coal and gas outburst dynamic effect.The results showed that about 60.453 kg of coal powder was blown out when the gas pressure was 0.35 MPa,the coal powder was mainly accumulated in the main roadway and presented a trapezoidal distribution,and there was almost no coal powder accumulation in the connection gate and branch entry;the gas pressure frequently fluctuated in a very short time (t<1.5s) at the same measuring point along the roadway and the peak value of gas pressure at different measuring points in the main roadway assummed an attenuated tendancy along the roadway.In addition,the existence of the shock wave was confirmed by experiments,and the propagation velocity of the shock wave in the main roadway was about 368.1 to 434.2 m/s.%为了深入探索煤与瓦斯突出过程中煤-瓦斯在巷道内的运移规律,利用自主研发的煤与瓦斯突出动力效应模拟实验装置,在"H"型巷道布置条件下进行了突出过程煤-瓦斯两相流运移规律的实验研究,结果表明:在气体压力0.35MPa时共突出煤粉60.453kg,煤粉主要堆积于主巷内,且呈梯形分布,联络巷与支巷内几乎没有煤粉堆积;沿巷道同一测点的气体压力在极短时间(t<1.5s)内发生多次波动,主巷道内不同测点气体压力峰值基本沿巷道呈衰减趋势.同时,通过实验验证了突出过程冲击波的存在,主巷内冲击波传播速度为368.1~434.2 m/s.