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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Study on the influence of joints on transmitted and reflected energy of explosive stress waves

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节理对爆炸应力波透反射能量影响研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2025, Vol.48 No.6: 846-851

DOI: 10.3969/j.issn.1003-5060.2025.06.021

Authors

WANG Pengcheng, XU Yongkai

(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: There are a large number of joints, cracks, and other defects in natural rock masses, which block and attenuate the propagation of explosive blasting energy. Based on the ANSYS/LS-DYNA numerical simulation software, this paper establishes a numerical model for linear elastic jointed rock blasting, and studies the influence of different occurrences of joints on the transmitted and reflected energy of explosive stress waves. The results show that as the joint thickness increases, the transmitted energy ratio gradually decreases and tends to stabilize, while the reflected energy ratio gradually increases and tends to stabilize; as the distance between the joint and the explosion source increases, the transmitted energy ratio gradually increases and tends to stabilize, while the reflected energy ratio gradually decreases and tends to stabilize; as the joint inclination angle increases, the transmitted energy ratio increases and gradually approaches 1.0, while the reflected energy ratio gradually decreases and approaches 0. When joints are filled with different materials, the smaller the elastic modulus of the filling material compared to that of the rock, the stronger the ability to reflect the energy of explosive stress waves, and the harder it is for stress waves to pass through the joint. The transmittance of explosive stress waves gradually decreases with the increase of the number of joints, and the more joints there are, the smaller the influence of joint thickness on the energy transmittance of explosive stress waves.

Keywords: rock blasting; joint properties; blasting energy; numerical simulation

作者信息

汪鹏程，徐永恺

(合肥工业大学土木与水利工程学院, 安徽合肥 230009)

摘要和关键词

摘要: 天然的岩体中存在着大量的节理、裂隙等缺陷, 裂隙对炸药爆破能量的传播起到阻断和衰减作用。文章基于 ANSYS/LS-DYNA 数值模拟软件, 建立线弹性节理岩石爆破数值模型, 研究不同产状的节理对爆炸应力波透反射能量的影响。结果表明: 随着节理厚度增大, 透射能量比逐渐减小并趋于稳定, 而反射能量比则逐渐增大并趋于稳定; 节理距爆源距离越远, 透射能量比逐渐增大并趋于稳定, 反射能量比逐渐减小并趋于稳定; 节理倾斜角度越大, 透射能量比越大, 并逐渐趋于 1.0, 反射能量比随节理倾斜角度增大而逐渐减小并趋于 0; 当节理填充不同材料时, 填充材料的弹性模量比岩石的弹性模量越小, 对爆炸应力波能量反射能力越强, 应力波越难透射过节理。爆炸应力波的透射率随着节理数量的增多而逐渐减小, 节理数量越多, 节理厚度对爆炸应力波能量透射率的影响则越小。

关键词: 岩石爆破；节理性质；爆破能量；数值模拟

Funding

国家自然科学基金资助项目（12272119）

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