炸药爆炸冲击波在巷道变点的传播规律模拟  

Simulation of explosive shock wave propagation rule at turning point of tunnel

作　　者：屈利伟[1] 杨振宏[1] 梁亚婷[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《西安科技大学学报》2011年第6期809-813,共5页Journal of Xi’an University of Science and Technology

摘　　要：采用ALE算法,使用ANSYS9.0数值模拟软件,选用30 kg TNT炸药为爆炸源(条形裸露药包),煤矿巷道截面积为6 m2(宽3 m×高2 m或宽2 m×高3 m),记录间隔时间Δt=5 ms,对爆炸冲击波通过巷道变点(夹角45°)的状态和对应时刻的压力变化、冲击波压力峰值随巷道截面积和巷道轴向距离的变化及空气冲击波压力在巷道同一截面的不同位置的变化规律进行模拟。得出:爆炸冲击波在爆炸后的某一距离处以平面波的形式在直巷道内传播;随传播距离的增加冲击波压力逐渐衰减,当通过巷道转弯处时冲击波在转弯处反射叠加,在转弯的外壁面处出现加大的压力峰值,约为转弯处内侧压力的3倍。We employ the ALE algorithm, and choose 30 kg TNT explosive as the blast source （a stripof naked explosive）, coal mine tunnel with cross-sectional area of 6m 2 （2 m wide by 3 m high or 3 m wide by 2 m high）, and recording interval time △t = 5 ms. Our goal is, through the software, to simulate the state and the corresponding pressure changes of shock wave through the tunnel bending point （ angle 45 °）, the peak pressure of the shock wave as the tunnel cross-sectional area and the axial distance change, and the variation of the shock wave pressure at different points in the same cross-section of mine tunnel. Finally, we conclude ： the general rule of the explosion shock wave propagation in tunnel at a certain distance travels in a form of plane wave in the straight tunnel; the wave pressure gradually decreases as the distance from the source increases. Moreover, the maximum peak pressure in outer lateral at the bending point, a larger peak value, is about 3 times larger than the one in inner lateral.

关 键 词：巷道变点 冲击波 传播规律 模拟算法 

分 类 号：TD26[矿业工程—矿井建设]