Fractal analysis for the blast-induced damage in rock masses with one free boundary

Zheng, Changda; Yang, Renshu; Li, Qing; Ding, Chuanxian; Xiao, Chenglong; Zhao, Yong; Zhao, Jie

doi:10.1080/15376494.2022.2134609

Cited by 9 publications

(1 citation statement)

References 30 publications

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“…In order to quantitatively describe the damage degree of blasting rock mass, the relationship between fractal dimension and rock mass damage degree is further established, as shown in Eq. ( 4 ) 39 , 40 . Where ω is the fractal damage; D f is the fractal dimension of blast-induced cracks after blasting; D 0 is the initial fractal dimension before blasting; is the fractal dimension under complete damage and destruction, it is equal to 2 in the two-dimensional case and 3 in the three-dimensional case.…”

Section: Discussionmentioning

confidence: 99%

Damage evolution law of multi-hole blasting igneous rock and quantitative evaluation model of damage degree based on fractal theory and clustering algorithm

Zhao,

Tu,

Miao

et al. 2024

Sci Rep

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The geological phenomenon of igneous rock invading coal seam is widely distributed, which induces mining risk and affects efficient mining. The pre-splitting blasting method of igneous rock is feasible but difficult to implement accurately, resulting in unnecessary safety and environmental pollution risks. In this paper, the blasting model with penetrating structural plane and the multi-hole blasting model with different hole spacing were established based on the Riedel–Hiermaier–Thoma (RHT) damage constitutive to explore the stress wave propagation law under detonation. The damage cloud diagram and damage degree algorithm were used to quantitatively describe the spatio-temporal evolution of blasting damage. The results show that the explosion stress wave presents a significant reflection stretching effect under the action of the structural plane, which can effectively aggravate the presplitting blasting degree of the rock mass inside the structural plane. The damage range of rock mass is synchronously evolved with the change of blasting hole spacing. The blasting in the igneous rock intrusion area of the 21,914 working face is taken as an application example, and the damage degree of rock mass is reasonably evaluated by the box-counting dimension and K-means clustering method, which proves the effectiveness of the blasting scheme and provides reference value for the implementation of related blasting projects.

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