摘要
软弱夹层是控制岩体稳定性的主要弱面。通过含软弱夹层水泥砂浆模型的爆破实验,分别对45°、90°和135°3方向爆破前后的声波速度与爆源距离进行回归分析,并将声波分析结果与爆后模型宏观观测结果进行对比,与实际情况一致。软弱夹层的爆后空间展布形态分为3个区域:爆腔区、压密区和非扰动区,其中爆腔区和压密区构成了软弱夹层的层裂区。
Weak intercalation is the main weak surface which controls the rock stability. Through a series of blasting experiments on cement mortar models with weak intercalation, regression analysis of sound wave velocity and the source distance in three directions along 45°, 90°and 135° before and after blasting are conducted. The analysis results are consistent with actual condition while compared with maoroscopic observation results of post blasting models. The explosion spatial distribution form of the weak intercalation is divided into three regions： blast cavity region, tightness region and undisturbed region. The layer-crack region of the weak intercalation is consisted of the blast cavity region and tightness region.
出处
《西南科技大学学报》
CAS
2008年第4期29-32,共4页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金资助项目(50574076)
关键词
爆破
软弱夹层
声波速度
层裂
Blasting
Weak intercalation
Sound wave velocity
Layer-crack
