《基于有限元数值计算的爆破震动强度分析.pdf》由会员分享,可在线阅读,更多相关《基于有限元数值计算的爆破震动强度分析.pdf(4页珍藏版)》请在三一文库上搜索。
1、276 Vol.27 No.6 20066 Rock and Soil Mechanics Jun. 2006 2004-09-09 1975E-mail: 10007598(2006) 06097704 1222 1. 1000292. 100081 O 242.21O 38 A Analysis of blasting vibration intensity based on finite element numerical calculation LIU Hong-yan1, LIU Guo-zhen2, YANG Jun2, CHEN Peng-wan2 1. Key Laborat
2、ory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 2. State Key Laboratory of Blasting Science and Technology, Beijng Institute of Technology, Beijing 100081, China Abstract: Forecasting of the blasting vibration is always the pr
3、emise and basis of the controlling of the blasting vibration damage, and is an important subject of it. Based on the numerical simulation method of finite element, the calculation method of particle vibration velocity, an important index reflecting the blasting vibration intensity, is discussed; and
4、 an comparison analysis of the calculation results between two different kinds of charge structures decked with air and water is made. Numerical simulation results indicate that the calculation results are correspondent with the actual results if the distance from the blasting center is not far; it
5、has certain significance to the design and construction of blasting. Key words: numerical simulation; vibration intensity; forecasting; decked charge 1 13 2 2006 ALE 2.1 2 42 ANSYS 3 SOLIOD164ALE 1/4500 cm 200 cm1 400 cm XOZYOZ Z14 mZ 103 334 93 972 2.2 1 LSDYNA3D Drucher-Prager Drucher-Prager E =48
6、 GPa=2.878 g/m3=0.23 4520c MPa 2 1.0 kg/m33 600V m/s cj P= 3.24 GPa 2 JWL JWL 4 12 12 11 RVR V E PAeBe RVR VV (1) 12 , , , , A B RRPV 2 A =214 GPaB =0.182 GPa 1 4.15R 2 0.95R0.3 2.3 3 3.1 200 m4 m14 m 1/2 46 90038 448YOZ XOYZ 3.2 =2.878 g/m3E = 48 GPa =0.23 3.3 5 k =4Q=176 kg 2.24 m 2.24 m Z X Z 1 9
7、78 6 (a) (b) 1 Fig.1 Result of pressure curves 3.4 2 R =36 m R =32 m R= 40 m R =40 m R=55 m R =55 m R=70 m R =70 m (a) (b) 2 Fig.2 Vertical velocity-time curves of seismic wave at different distances under two conditions 979 2006 1 1 Table 1 Results comparison between numerical simulation and testin
8、g /m /cm s-1/cm s-1/m /cm s-1 /cm s-1 1 36 3.22 2.87 32 2.45 2.41 2 40 2.70 2.69 36 2.30 2.33 3 44 2.62 2.50 40 2.10 2.19 4 59 1.48 2.40 55 1.25 1.82 5 74 1.20 1.80 70 0.81 1.41 6 89 0.80 1.20 85 0.72 0.92 7 104 0.65 0.94 100 0.60 0.70 1 4 1 ,. J. , 2004, 2004(): 136 140. WU Li, RAO Yang-an, HUANG C
9、hang-bo. Overview of analysis forecasting and controlling method of blasting vibrationJ. Hydrogeology and Engineering Geology, 2004, 2004(Supp.): 136140. 2 ,.BP J. , 2002, 21(S2): 2 5542 557. CHEN De-zhi, ZHU Rui-geng, XU Shun-xiang. Forecasting study on influence of roadbed blasting on neighboring
10、house based on BP neural networkJ. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(S2): 2 5542 557. 3 ,. J. , 1999, 19(2): 133138. XU Quan-jun, LIU Qiang, NIE Yu-jun, et al. Study of neural network prediction on peak particle amplitude of blasting ground vibrationJ. Explosion and Shock W
11、aves, 1999, 19(2): 133138. 4 ,. J. , 2002, 21(4): 550553. WANG Zhong-qi, ZHANG Qi, BAI Chun-hua. Numerical simulation of influence of hole depth on explosion effectJ. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(4): 550553. 5 ,. J. , 2000, 6(3): 1 7. LONG Yuan, FENG Chang-gen, XU Quan-jun, et al. Study on propagation characteristics of blasting seismic waves in a rock medium and numerical calculationJ. Engineering Blasting, 2000, 6(3): 17. 980
链接地址:https://www.31doc.com/p-3704642.html