Research And Application Of Similar Pre-spliting Blasting Technique

In a large number of earth and rock blasting works,If the final slope are in strict accordance with blasting process and technical requirements of the standard implementation, It would be a significant increase in the cost of project. However, for important and rock blasting works with blasting is necessary, As important and hydroelectric projects, special projects, the implementation can ensure safe and reliable operation of the project and use, significantly reduces the slope of spalling, landslide and the rolling stones and debris flow, and other disasters and ultimately achieve slope or wall smooth, stable effect. If Rock Blasting for road blasting technology improvements, and to close the basic requirements of the technology and design, construction specifications, will greatly reduce the cost of the blasting, but also can improve the construction schedule. Therefore, the use of the existing blasting and blast theory, explosive material on blasting process improvement, on the slope of the bursting of the implementation that meets a certain index requirements and reduce the cost of blasting technique known as prospective blasting.In the traditional sense of the blasting of the implementation of the program is the first initiation blasting holes, and then detonating main blasting the hole and buffering the hole; and prospective blasting of implementation is the first buffer holes, and then detonating explosive blasting holes, finally turn initiation primary explosive blast-hole in the region. In the traditional sense of the blasting design, blasting hole spacing General design for borehole diameter of 7-12 times, blasting in blasting hole spacing factor off for drill diameter of 11-18 times, increased by 50% or more, resulting in lower cost of blasting.Lower blasting vibration on the slope and the slope of the foreign reserves of the impact of rock blasting one of the main purposes of. Due to the blast vibration size and maximum single dose are closely related, so in the research and practice, this paper will focus from blast vibration signal analysis, searching for the blasting area, within the same millisecond time as well as other parameters fixed, the buffer hole design parameters and pre hiatus parameter change, through retaining slope blast vibration signals numeric features and changes for analysis so relatively reasonable buffer holes and tears design parameters and for hiatus line charge density design provides support to minimize blast vibration and protective purpose of slope stability; Papers to blast vibration test technique combined with vibration signal processing technology as the Foundation for research, for optimized buffer holes and tears design parameters.