Journals Information
Civil Engineering and Architecture Vol. 11(4), pp. 1835 - 1855
DOI: 10.13189/cea.2023.110414
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Large Diameter Holes Presplitting
Ahmed Hemed *, Latifa Ouadif
3GIE Laboratory, Mohammedia Engineering School, Mohammed V University in Rabat, Morocco
ABSTRACT
Increasing the diameter of drill holes is an option to increase the tonnage in open-pit mines. This explains the appearance of unexpected disorders during drilling and blasting, the consequences of which classically take the form of both instability in the pit walls and collapses affecting the surface. Here, the phenomena observed are located between the slopes of the M'HAOUDATT pit. The disorders inherent in large-scale mining appear on the pit walls. The company operating the pit exploits the benches only with large diameter drills. The objective of this work is to find an optimal method to minimize the effects of the vibration of the blast on the pit of M'HAOUDATT in order to reward the absence of the Presplitting machines. Proposals to limit the effects of blasting were discussed in two aspects, such as reducing the tonnage of explosive in the holes or finding a way to reduce the diameter of the hole, which is considered inappropriate to create stable fronts. We conclude that it is preferable to play on the diameter of the hole and to concentrate on this direction in order to come up with a method to replace the absence of pre-splitting machines in the mine. The method of borehole diameter reduction is considered new for the pit operators. Therefore, it will not be effective in the test phases despite the relevant results after the front blasting. It is important to note the difficulties of replacing small drilling machines in open-pit mines. The implication is the efficiency of the method, the right way of execution and the training of the mine personnel.
KEYWORDS
M'HAOUDATT, Open Pit, Slope Stability, Presplit, Drill, Blast, Explosive, ANFO
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Ahmed Hemed , Latifa Ouadif , "Large Diameter Holes Presplitting," Civil Engineering and Architecture, Vol. 11, No. 4, pp. 1835 - 1855, 2023. DOI: 10.13189/cea.2023.110414.
(b). APA Format:
Ahmed Hemed , Latifa Ouadif (2023). Large Diameter Holes Presplitting. Civil Engineering and Architecture, 11(4), 1835 - 1855. DOI: 10.13189/cea.2023.110414.