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Abstract High rock slope is a common type of slope in mountainous areas during highway construction，and the issue of its stability has been closely followed by geotechnical research scholars. Based on research of the blasting vibration and its effect during the excavation of cutting slope，the analytical methods and the evaluation criteria of the high rock slope¢s dynamic stability were discussed. Taking Yanqing—Longqingxia road reconstruction project as the background，a finite element analysis model of the dynamic response of high rock cutting slope under the load of explosion was established and the explosion¢s influence on the dynamic stability of upper bench slope during the excavation of lower bench slope with different blasting design parameters and different slope design types was discussed. The results of the detailed research indicated that the particle vibration velocity of slope strikingly decreased when using cushion blasting technology and suitable design degree of slope，and the influence of blasting on the cutting slope stability was effectively controlled.
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Received: 17 April 2009
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