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井下大爆破作业,势必引起周边岩体大的震动,同时波及爆区周边地表和地下构筑物、井下工程等设施。为确定井下采场大爆破的规模,预测和掌握爆破震动的影响范围和破坏程度,对井下大直径深孔爆破不同爆破规模、同段起爆药量的爆破震动速度等参数进行理论计算预测,同时开展现场爆破监测试验,通过对预测及试验结果进行讨论分析得出V合=84.7162(Q1/3/R)1.44964,并提出相应安全保障措施,为井下大直径深孔爆破崩矿作业的科学性及安全稳定性提供了必要的技术支撑。
Downhole blasting operation, is bound to cause a large vibration around the rock mass, while spreading to the surrounding area and underground structures, underground engineering and other facilities. In order to determine the scale of large-scale downhole stope blasting, predict and grasp the impact range and extent of blasting vibration, predict the parameters such as blasting size of large-diameter deep hole blasting blasting, blasting vibration velocity in the same section, etc., To carry out on-site blasting monitoring test, through the analysis of the prediction and test results, the V = 84.7162 (Q1 / 3 / R) 1.44964 is obtained and the corresponding safety measures are put forward, which is scientific for the operation of downhole large- And security and stability provided the necessary technical support.