爆破对软弱夹层的影响
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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 macroscopic 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.
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 macroscopic 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.
引文
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[2]李夕兵.论岩体软弱结构面对应力波传播的影响[J].爆炸与冲击,1993,13(4):334~342.LI Xi-bing.Influence of the Structural Weakness Planes in Rock Mass on the Propagation of Stress Waves[J].Explosion andShock Waves,1993,13(4):334~342.(in Chinese)
[3]刘一伟,张继春,郭学彬,等.软弱夹层强度参数的室内模拟[J].西南科技大学学报,2007,22(1):30~34.LIU Yi-wei,ZHANG Ji-chun,GUO Xue-bin,et al.Study on Laboratory Simulation of the Weak Intercalation Intensity Parame-ters[J].Journal of Southwest University of Science and Technology,2007,22(1):30~34.(in Chinese)
[4]Da Gama,C.D.Use of Comminution Theory to Predict Fragmentation of Jointed Rock Masses Subjected to Blasting[C].Proc.1st Int Symp on Rock Frag by Blasting,Sweden:Lulea,1983.565~579.
[5]SL264-2001.水利水电工程岩石试验规程[S].中华人民共和国水利部,2001.SL264-2001.Rock Test Regulations for Water Conservancy&Hydropower[S].The Ministry of Water Resources of the Peo-ple’s Republic of China,2001.(in Chinese)
[6]高全臣,刘殿书.岩石爆破测试原理与技术[M].北京:煤炭工业出版社,1996.GAO Quan-chen,LIUDian-shu.Principle And Technology of Rock Blasting Testing[M].Beijing:Coal Industry Press,1996.(in Chinese)
[7]张雪亮,黄树棠.爆破地震效应[M].北京:地震出版社,1981.ZHANG Xue-liang,HUANG Shu-tang.Blasting Vibration Effect[M].Beijing:Earthquake Publishing House,1981.(in Chi-nese)
[8]李造鼎.岩体测试技术[M].北京:冶金工业出版社,1993.LI Zao-ding.Rockmass Testing Technique[M].Beijing:Publishing House of Metallurgical Industry,1993.(in Chinese)
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