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Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China
المؤلفون المشاركون
Ju, Feng
Xiao, Meng
He, Zequan
Ning, Pai
Huang, Peng
المصدر
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-11-13
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Ultra-thick hard sandstone roofs present high thickness, poor delamination, and wide caving range.
The strata pressure of the working face during actual mining increases, having a significant influence on the safe mining of the working face.
Especially, in the mining areas of western China, the fully mechanized mining faces with high mining height and high-strength mining are more prominent.
Understanding the fractures and stress evolution characteristics of the ultra-thick hard sandstone roof during actual mining is of high significance to control the dynamic pressure on the working face.
In this paper, the typical ultra-thick hard sandstone roof of the Xiaojihan coal mine was taken as an example.
The structural and chemical composition characteristics were analyzed.
Besides, the fracture characteristics of ultra-thick hard roof during the working face mining were analyzed.
Moreover, the fracture structure consistency was verified through physical simulation and a field measurement method.
Finally, the stress evolution laws in the ultra-thick hard sandstone roof fracture were studied through numerical simulation.
The findings demonstrated that (1) the ultra-thick hard sandstone roof was composed of inlaid coarse minerals, which had compact structure, while the Protodyakonov hardness reached up to 3.07; (2) under the high-strength mining condition of fully mechanized mining face with large mining height, the ultra-thick hard sandstone roof had the characteristics of brittle fracture, with a caving span of 12 m; (3) under the high-strength mining condition of fully mechanized mining face with large mining height, the ultra-thick hard sandstone roof followed the stress evolution laws that were more sensitive to the neighboring goaf.
Therefore, it was necessary to reduce the fracture span or layering of ultra-thick hard sandstone roof through the manual intervention method adoption or increase either the strength of coal pillar or supporting body, to resist the impact generated during ultra-thick hard sandstone roof fracture.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Ju, Feng& Xiao, Meng& He, Zequan& Ning, Pai& Huang, Peng. 2018. Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1116218
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Ju, Feng…[et al.]. Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China. Advances in Civil Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1116218
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Ju, Feng& Xiao, Meng& He, Zequan& Ning, Pai& Huang, Peng. Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1116218
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1116218
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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