Abstract
Numerical Simulation of Parallel Cutting with Different Number of Empty Holes
Highlights
The empty hole can provide auxiliary free surface and the compensation space of rock breaking process for blasting
The simulation results show that the blasthole detonation is within 80 μs, and the explosion stress wave propagates in all directions in the form of columnar waves
When the stress wave reaches the central empty hole of the model I and the Model III, it can be seen from the stress cloud diagram that the stress wave generates a reflection tensile stress at the central hole of the Model I and the Model III, and a stress concentration phenomenon occurs; At about 136 μs, the Model I and the Model III center empty hole cause the tensile damage to produce the crack, the crack along the horizontal direction expands
Summary
The empty hole can provide auxiliary free surface and the compensation space of rock breaking process for blasting. It is possible to increase the blasting effect by appropriately increasing the volume of empty holes, but the diameter of the empty hole and the diameter of the blasthole are the same in some conditions under the actual blasting construction. Li Qiyue [1] established a theoretical model by ANSYS finite element analysis software, and obtained that the tensile failure and compression damage of rock under stress wave are more obvious with the increase of empty hole diameter. In Zhang Qi [2] by means of mechanical model and numerical calculation, the factors influencing the effect of cutting blasting are quantitatively analyzed, as well as the effect of empty holes in Parallel cutting. In Zhu Z [7] by using linear equation of state and the major principal stress failure criterion, numerical models were established by using
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
