地下中深孔爆破地震波监测及衰减影响因素分析

发布时间：2018-06-24 14:57

本文选题：爆破振动 + 灰色理论　；参考：《爆破》2016年04期

【摘要】：消除及控制城市矿山井下爆破对地表环境及构筑物的振动影响具有重要意义。针对梅山铁矿爆破振动控制问题,在大量爆破振动监测的基础上,采用灰色关联度法对爆破振动影响因素开展分析。以振动合速度和主频作为系统特征指标,以单段最大药量、总药量、爆心距、高程差、分段数和炮孔数6个比较数列作为影响因素,通过灰关联度计算得到该6个指标的关联度排序。通过对实测数据进一步统计分析,将分段数控制在5段及以上对于控制地表爆破振动速度有显著效果。从最大限度控制地表振动主频的角度看,应优先使用逐孔起爆,一次爆破总药量控制在950 kg为宜。
[Abstract]:It is of great significance to eliminate and control the vibration effects of underground blasting on surface environment and structures. Aiming at the problem of blasting vibration control in Meishan Iron Mine, on the basis of a large number of blasting vibration monitoring, the influence factors of blasting vibration are analyzed by grey correlation degree method. The main frequency and velocity of vibration are taken as the characteristic indexes of the system, and six series of comparative numbers, such as the maximum amount of single stage, the total amount of charge, the distance between the center of explosion, the height difference, the number of sections and the number of holes, are taken as the influencing factors. The order of correlation degree of the six indexes is obtained by calculating the grey correlation degree. Through further statistical analysis of the measured data, it is shown that controlling the number of segments to 5 or more is effective in controlling the vibration velocity of blasting on the ground. From the point of view of controlling the main frequency of surface vibration, priority should be given to the priming by hole, and the total charge of primary blasting should be controlled at 950kg.
【作者单位】：中南大学资源与安全工程学院;南京梅山冶金发展有限公司矿业分公司;
【基金】：国家自然科学基金(51204205) “十二五”国家科技支撑计划课题(2013BAB02B05) 中南大学“创新驱动计划”(2015CXS013)
【分类号】：TD235

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