岩体在爆破载荷作用下的损伤程度和损伤范围是影响矿山工程安全的关键问题之一。采用超声波测试和岩石压缩试验方法,从爆破前后岩体平均波速和岩石平均抗压强度两个方面研究了白云岩岩体的爆破损伤。结果表明:装填药量为4.5 kg的乳化炸药爆破,岩体受爆破损伤的影响范围不大于8 m;且岩体平均波速和岩石抗压强度均随爆源距离增大而增大,即岩体损伤随爆源距离减小而增大;岩体平均波速和岩石抗压强度减小幅度均随爆源距离的减小而增大,即到爆源的距离越小,岩体损伤的增量越大。 The damage degree and damage range of rock mass under blast load are one of the key problems that affect the safety of mine engineering. Using ultrasonic test and rock compression test method, the blasting damage of dolomite rock mass was studied from two aspects of average rock mass velocity and average compressive strength of rock before and after blasting. The results show that the influence range of rock mass blasting damage is not more than 8 m. The average wave velocity and compressive strength of rock mass increase with the increase of explosion source distance, ie rock The body damage increases with the decrease of the explosion source. The average velocity of the rock mass and the compressive strength of the rock decrease with the decrease of the explosion source distance, ie, the smaller the distance to the explosion source, The greater the amount.