E-ISSN 2705-3954 | ISSN 0794-4756
 
2026, Vol: 33, Issue: 1
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Original Article 
NJE. 2022; 29(1): 102-112


Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software

Amoah Bismark, Zacheus Olaniyan Opafunso, Gafar Omotayo Oniyide.


Abstract
Re-entry into blast fume affected underground areas is a safety and productivity concern for most mines. Overestimation of the re-entry time may improve clearance of noxious gases but can result in production delays and decreased overall productivity while underestimation of the re-entry time will also lead to safety and health problems. At Chirano Gold Mine Limited (CGML), studies show that, the blastmen use their experience to guess the re-entry time and most often their guesses overestimate or underestimate the re-entry time. This project seeks to eradicate the guess of the re-entry time by conducting explosive simulations using VentSim software to serve as a tool to predict the re-entry time of any development blast. In this work, three different ventilation models were run to evaluate the re-entry time in single and multiple headings. The models were based on the Paboase mine at Chirano Gold Mine Limited (CGML). The results showed that, the VentSim can serve the purpose of always predicting the re-entry time and by comparing the data collected with the results from the three scenarios, it is very clear that the blastmen in their guess of the re-entry time always overestimate it.

Key words: Re-Entry Time, Gold Mine, Underground


 
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How to Cite this Article
Pubmed Style

Bismark A, Opafunso ZO, Oniyide GO. Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. NJE. 2022; 29(1): 102-112.

Web Style

Bismark A, Opafunso ZO, Oniyide GO. Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. https://www.njeabu.com.ng/?mno=98309 [Access: June 27, 2026].

AMA (American Medical Association) Style

Bismark A, Opafunso ZO, Oniyide GO. Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. NJE. 2022; 29(1): 102-112.


Vancouver/ICMJE Style

Bismark A, Opafunso ZO, Oniyide GO. Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. NJE. (2022), [cited June 27, 2026]; 29(1): 102-112.


Harvard Style

Bismark, A., Opafunso, . Z. O. & Oniyide, . G. O. (2022) Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. NJE, 29 (1), 102-112.


Turabian Style

Bismark, Amoah, Zacheus Olaniyan Opafunso, and Gafar Omotayo Oniyide. 2022. Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. Nigerian Journal of Engineering, 29 (1), 102-112.


Chicago Style

Bismark, Amoah, Zacheus Olaniyan Opafunso, and Gafar Omotayo Oniyide. "Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software." Nigerian Journal of Engineering 29 (2022), 102-112.


MLA (The Modern Language Association) Style

Bismark, Amoah, Zacheus Olaniyan Opafunso, and Gafar Omotayo Oniyide. "Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software." Nigerian Journal of Engineering 29.1 (2022), 102-112. Print.


APA (American Psychological Association) Style

Bismark, A., Opafunso, . Z. O. & Oniyide, . G. O. (2022) Predicting the Re-Entry Time at Chirano Gold Mine Limited Southwestern Ghana Using VentSim Simulation Software. Nigerian Journal of Engineering, 29 (1), 102-112.


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