某矿井下浅孔毫秒延时爆破地表震动的数值模拟研究

Vibration intensity of multi milliseconds blasting in underground mine based on LS-DYNA

某地下矿山上方地表分布有土坯房,一层、二层砖混结构民房以及水稻田.该矿山生产过程中产生的爆破震动易影响周边民房的稳定.为研究该矿山井下生产爆破时地表的震动强度,确保民房震动强度安全,利用LS-DYNA有限元方法对某次具有代表性的生产爆破下的地表震动强度进行了分析研究.通过对该次具有代表性的生产爆破数值计算与爆破震动现场测试结果对比分析表明,采用ANSYS/LS-DYNA的数值计算结果与实际测试值偏差不大,数值模拟分析方法对爆破震动强度的预测具有一定的指导价值.

There are adobe houses, one or two layers of brick housing and paddy field over the underground mine. The stability of the houses is influenced by blasting vibration generated during the production process of the mines. In order to predict vibration intensity and ensure the safety of surface buildings in an underground mine production multi millisecond blasting, a numerical simulation analysis of the vibration of a certain representative production blasting is conducted by LS-DYNA software. The comparative analysis of the numerical results and the actual measurements shows that the result of ANSYS/LS- DYNA software element software has little difference with the actual test values. ANSYS/LS-DYNA software has a certain guiding value to forecast blasting vibration intensity.