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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

Discussion on equivalent load values in numerical simulation of uncoupled rock hole blasting

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不耦合岩孔爆破数值模拟时等效荷载取值问题探讨

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Nov.2025, Vol.48 No.11: 1533-1541

DOI: 10.3969/j.issn.1003-5060.2025.11.015

Authors

WANG Pengcheng, GUO Jinsong, XIA Wenli, XU Yongkai

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

Abstract and Keywords

Abstract: In order to discuss the reasonable value of equivalent load in uncoupled charge blasting, the solid explosive models with different uncoupling coefficients and the equivalent load models based on the equal range of rock fracture I zone are established in this paper. After multiple trial calculations, the corresponding equivalent load of each uncoupling coefficient is determined, and then the corresponding relationship between the peak value of equivalent load and the uncoupling coefficient is obtained. The adjustment coefficients of hole wall pressure under different uncoupling coefficients are obtained by fitting. Combined with the existing formula for calculating the peak pressure of hole wall, the empirical formula of equivalent load related to uncoupling coefficient is obtained. Three examples of rock single-hole blasting with different uncoupling coefficients are simulated by explosive solid method and equivalent load method, and the damage range, peak particle velocity and peak pressure of rock are investigated and compared. The results show that the numerical simulation results of the two models are in good agreement, which verifies the accuracy of the empirical formula. This study provides a reference for the reasonable value of the equivalent load of uncoupled charge blasting.

Keywords: blasting; equivalent load; numerical simulation; uncoupling coefficient; damage range

作者信息

汪鹏程，郭劲松，夏文丽，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: 为探讨不耦合装药爆破等效荷载合理取值问题,文章分别建立不同不耦合系数实体炸药模型和按岩石破裂Ⅰ区范围相等为等效标准的施加荷载模型,经过多次试算确定各不耦合系数相应的等效荷载,得到等效荷载峰值与不耦合系数的对应关系,拟合得出不同不耦合系数下的孔壁压力调整系数。结合现有孔壁压力峰值计算公式得到不耦合系数相关的等效荷载经验公式。对3个不同不耦合系数岩石单孔爆破实例均采用炸药实体和施加等效荷载2种方法进行模拟,并重点从岩石损伤范围、质点峰值振动速度和峰值压力3个方面进行对比分析。结果表明,2种模型数值模拟结果吻合度较高,验证了经验公式的准确性。该研究为不耦合装药爆破的等效荷载合理取值提供一定的参考。

关键词: 爆破；等效荷载；数值模拟；不耦合系数；损伤范围

Funding

国家自然科学基金资助项目（12272119）；国家自然科学基金联合基金资助项目（U1965101）

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