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为了研究瓦斯爆炸在并联巷网内的传播特征,利用并联管道系统模拟爆炸在实际巷道内的传播特征.结果表明:爆源点在掘进头时,并联管道两侧的火焰传播速度Sf和爆炸超压值ΔPmax接近,火焰和冲击波叠加后,爆炸强度增加,ΔPmax从0.38 MPa突跃到0.46 MPa.爆源点在工作面时,爆炸向邻近掘进头传播时测得的火焰速度和爆炸超压缓慢增大,而向较远的封闭端传播时ΔPmax的值一直增大,而火焰传播分3个不同的区段;爆炸向邻近工作面传播时,在汇聚点附近测得的爆炸超压(0.44 MPa)明显高于两侧的超压值(0.39和0.38 MPa),但火焰传播速度会降低.煤矿瓦斯爆炸叠加地点附近是爆炸破坏较严重区域,故是设备和人员防护的重点区域.
In order to study the propagation characteristics of gas explosion in the parallel network, the parallel pipeline system was used to simulate the propagation characteristics of the explosion in the actual roadway.The results show that when the explosion source is at the driving head, the flame propagation velocity Sf on both sides of the parallel pipe, The pressure value ΔPmax is close, and after the flame and the shock wave are superposed, the intensity of explosion increases, ΔPmax jumps from 0.38 MPa to 0.46 MPa. When the explosion source is on the working face, the flame velocity and explosion overpressure measured when the explosion propagates to the adjacent driving head are slow , While the value of ΔPmax increases as it propagates to the more distant closed end, while the flame spread is divided into three different sections. When the explosion propagates to the adjacent working face, the explosion overpressure (0.44 MPa) was significantly higher than the overpressure values (0.39 and 0.38 MPa) on both sides, but the flame propagation speed will be reduced.Magnetic gas explosion in the vicinity of the explosion damage is more serious damage areas, it is the focus of equipment and personnel protection.