【作者】 唐小军；

【导师】 张建华；

【作者基本信息】 武汉理工大学 ， 采矿工程， 2007， 硕士

【摘要】 在工程爆破中，经常遇到爆破对爆区附近地下结构稳定性的影响问题。譬如露天爆破对地下矿山井巷的影响；定向爆破筑坝对导流隧洞的影响等。在这些工程中，必须确保附近地下构筑物(如隧道、巷道、涵洞、地下厂房、硐室库房等)安全，在爆破设计中应正确地判定爆破对其安全影响的程度。因此，研究地表爆破地震波对地下硐室的影响，不仅具有重要的理论意义，同时也具有重要的工程意义。本文运用ANSYS／LS-DYNA软件，模拟地表爆破对地下硐室的震动影响。对数值模拟的质点振速数据进行非线性拟合，得到地下硐室顶板质点峰值衰减规律。同时还对爆破地震波入射角度对硐室震动的影响，硐室埋深和硐室形状对硐室顶板质点振动响应的影响进行了初步分析，得出了几点结论。结合河南平顶山瑞平石龙水泥有限公司的矿山削顶爆破工程，运用数值模拟的分析结果与现场爆破监测数据进行对比分析，预测一定埋深的地下硐室的最大振动速度；同时结合地面的爆破地震波传播规律和数值模拟的地下爆破地震波传播规律计算大爆破的最大段安全药量，并根据预测值和实际情况提出降震措施，为实际爆破方案的设计提供了一定科学依据，确保该工程的顺利进行。更多还原

【Abstract】 In engineering blasting, the influence of blasting vibration often on adjacent the stability of underground constructures. For instance, open blasting have an impact on underground mines and laneways, as well as a directional blasting of dams will affect the diversion tunnel. To ensure the safety of underground constructures nearby (like tunnels, mine roadways, culvert, underground powerhouse, underground storage and so on), it is very important to know in what extent the blasting affects the safety in blasting design. As a result, the research on influence of surface blasting seismic wave on the roof of underground chambers is not only of great theorial but also engineering significance.The software ANSYS/LS-DYNA is used in this paper to stimulate vibration impacts of surface blasting on underground chambers. Then a nonelinear fitting is used to analyse the analogue the mass particle vibration velocity. Meanwhile the paper has analysis on impacts of blasting seismic wave from different directions on the roof of underground chamber, and different depths and shape of it, finally several conclusions are made based on that.A case of blasting project of mine to cut the slope of Henan Pingdingshan Ruipingshilong cement Co.,Ltd is analysed in this paper, then an analysis is made based on results of numerical stimulate and the datas of scene blasting vibration monitoring. The paper predicts a safety vibration velocity of underground chambers; makes a calculation of maximum safety quantity of charge in blasting by using scene monitoring datas and propagation law of underground blasting seismic wave by numerical stimulate, and to make several suggestions for shock absorption measures based on the predicted results and practical situation. Thus a scientific basis has been provided for practical blasting plan to guarantee the smooth progress of the project.更多还原