Optimal Charge Scheme Calculation for Multiring Blasting Using Modified Harries Mathematical Model
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 2
Abstract
A new optimization method for optimal charge scheme calculation is proposed to reduce undesired phenomenon in ring blasting, including brow damage, overcrushing, and bulking yield, which are caused by the unreasonable distribution of blasting energy. First, all the feasible charge schemes are calculated by a traversal algorithm. Then fragment size value is predicted according to the blasting simulation program, which is based on a modified Harries mathematical model. Finally, the optimal charge scheme is selected by the and of fragment size value of the muck pile. The program is developed by Visual LISP on the AutoCAD platform. A case study illustrates the optimization procedure, and some field tests were conducted in Tonglvshan copper mine and Fankou mine to verify the feasibility of the program. The optimization method can play a positive role in brow protection. It can also obviously improve the muck pile fragment-size distribution.
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Acknowledgments
This research is partially supported by the National Natural Science Foundation Project of China (Grant No. 41807259), the State Key Laboratory of Safety and Health for Metal Mines (Grant No. 2017-JSKSSYS-04), the Shenghua Lieying Program of Central South University (Principle Investigator: Dr. Jian Zhou), the China Postdoctoral Science Foundation funded project (Grant No. 2017M622610), and the Natural Science Foundation of Hunan Province (Grant No. 2018JJ3693).
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 2 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Mar 26, 2018
Accepted: Aug 22, 2018
Published online: Jan 7, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 7, 2019
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