摘要
岩石中装药爆炸产生的爆破能量可分为爆炸冲击波能量和爆生气体膨胀能量。对爆炸能量分布的理论分析有助于改善爆破效果,提高爆破质量。在柱状耦合装药情况下,分析了冲击波作用下岩石变形和破坏的特点、爆生气体对爆腔的扩腔作用,考虑了在岩体的损伤情况下爆生气体对裂纹的驱裂作用。计算结果表明:埋深在临界深度以下时,岩石中柱状装药爆破冲击波做功消耗的能量约占爆炸总能量的40%,剩余爆生气体能量中用于扩腔和扩展主要裂隙的能量约占总能量的23%,剩余大约37%的能量中有小部分能量用于新增裂纹数目,而大部分损失掉了。
The explosive energy of charge in rock is composed of shock wave energy and gaseous explosive energy. Analysis of the distribution of explosive energy can help to improve the blasting effect and blasting performance. During coupling column blasting, the features of deformation and destruction of rock by shock wave, the explosion of cavity by detonation gas, and moving of cracks by the detonation gas with considering advance damage are analyzed. The result calculated for several rocks shows that the shock wave energy consumed makes up about 40% of the total energy of the charge. The energy consumption in the course of the oayity and main cracks expansion accounts for about 23% of the total blasting energy. The spare energy among which most is consumed to increase the amount of cracks is lost.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第5期735-739,共5页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.50239097)
教育部优秀青年教师资助计划(No.2081)
关键词
岩石爆破
柱状装药
爆炸能量
冲击波
rock blasting
column charge
explosion energy
shock wave
