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Influences of Water Vapor on Roof Fall Accidents in Selected Underground Coal Mines in Malawi
المؤلفون المشاركون
Fujii, Yoshiaki
Kodama, Jun-ichi
Fukuda, Daisuke
Dassanayake, Anjula B. N.
Yasidu, Umali M.
Maneya, George J.
Dandadzi, Johnson
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-17، 17ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-02-06
دولة النشر
مصر
عدد الصفحات
17
التخصصات الرئيسية
الملخص EN
To develop affordable countermeasures against the roof falls, the accident records of Mchenga Mine were investigated as the first step.
Based on the accident records, it was found that roof falls occurred most in April and May.
Humidity measurements were taken both in the underground mine and at surface, and humidity peak appeared in April.
The accident occurrence and the underground humidity had a positive correlation in which no roof falls could be expected under a humidity of less than a certain value.
Effect of humidity on the indirect tensile strength of the rock samples collected from the mine was investigated, and it showed that the indirect tensile strength decreased with humidity.
The diffusion coefficient was measured for the rock samples collected from Mchenga Mine as well as from Kaziwiziwi Mine, and the migration of water vapor into rock mass in the roof was calculated for Mchenga case.
It was clarified that the weakening of tensile strength was transmitted upward at several centimeters per day from the immediate roof.
This could explain the slight difference of the accident peak in April and May from the humidity peak in April.
Introducing fresh and dry outside air, if possible, will not only improve the working environment but also contribute to a decrease in roof falls.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Yasidu, Umali M.& Fujii, Yoshiaki& Kodama, Jun-ichi& Fukuda, Daisuke& Maneya, George J.& Dandadzi, Johnson…[et al.]. 2019. Influences of Water Vapor on Roof Fall Accidents in Selected Underground Coal Mines in Malawi. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1116495
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Yasidu, Umali M.…[et al.]. Influences of Water Vapor on Roof Fall Accidents in Selected Underground Coal Mines in Malawi. Advances in Civil Engineering No. 2019 (2019), pp.1-17.
https://search.emarefa.net/detail/BIM-1116495
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Yasidu, Umali M.& Fujii, Yoshiaki& Kodama, Jun-ichi& Fukuda, Daisuke& Maneya, George J.& Dandadzi, Johnson…[et al.]. Influences of Water Vapor on Roof Fall Accidents in Selected Underground Coal Mines in Malawi. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1116495
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1116495
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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