Fracture and Damage of Slit Charge Blasting in the Layered Rock Mass
Source abstract
Abstract
Directional fracture blasting technology of the slit charge has broad application prospects in the drilling and blasting construction of the layered rock mass. In this paper, the method of model experiment and numerical simulation is used to preliminarily explore the fracture damage characteristics of slit charge blasting in the layered rock mass. The results show that the blasting effect of the slit charge in the layered rock mass is significantly different from that of the unlayered rock mass, and the pressure relief of the blasting gas at the layer is the main factor affecting the blasting effect. The length of directional cracks in the slit direction is significantly larger than that in other directions, and the directional fracture effect of the slit charge in the layered rock mass can still be played well. However, both the directional crack length and the damage range of rock mass in the slit direction gradually decrease along the detonation direction. In addition, the damage value of a single-layer rock mass also decreases gradually along the detonation direction. In engineering practice, the directional fracture effect of the layered rock mass can be improved by detonating at both ends of the slit charge at the same time.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · Structural Response to Dynamic Loads · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Safety and Health for Metal Mines, Sinosteel Maanshan General Institute, Mining Research Co., Ltd., Maanshan 243000, China
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
School of Chemical and Blasting Engineering, Anhui University of Science & Technology, Huainan 232000, China
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
Funding
Foundation of State Key Laboratory of Safety and Health for Metal Mines · National Natural Science Foundation of China
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