A Method to Accurately Determine the Methane Enrichment Zone of a Longwall Coal Mine
المؤلفون المشاركون
Feng, Guorui
Hu, Shengyong
Zhang, Ao
Guo, Xiangqian
Li, Chao
Hao, Guocai
Li, Zhen
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-02-27
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
Large numbers of gobs are produced as a result of underground longwall mining, and a large amount of these gobs is known to contain methane gas reserves.
The efficient drainage of these methane resources is directly dependent on accurately determining the methane enrichment zone (MEZ) in longwall mining gobs.
In this study, a method for accurately determining the MEZ within the zone of interconnected fractures, which utilized a surface directional borehole (SDB) technique, was proposed.
The SDB was designed and implemented in a longwall gob located in the Sihe Coal Mine in China’s Shanxi Province.
The trajectory of the SDB constantly varied in the different overlying stratum layers and locations above the gob.
The methane flow rate and concentration from the SDB, along with the methane concentration in the upper corner of the longwall face, were monitored and obtained as the longwall face advanced.
Then, by analyzing the acquired data of the different horizontal and vertical positions of the SDB, the accurate locations of the MEZ within the zone of interconnected fractures were determined.
There were the methane decrease zone (MDZ) and methane shortage zone (MSZ) below and above the MEZ, respectively.
The results showed that in the MEZ, both the methane flow rate and concentration displayed slight decreasing trends and maintained high levels as the distance from the roof of the coal seam increased.
In the MDZ, a sharp decline was observed in the methane flow rate.
However, a relatively high methane concentration had still been maintained.
In the MSZ, both the methane flow rate and concentration displayed dramatic fluctuation and relatively low levels.
The average methane flow rates in the MEZ were determined to be 1.3 and 1.6 times higher than those in the MDZ and MSZ, respectively.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Feng, Guorui& Zhang, Ao& Hu, Shengyong& Guo, Xiangqian& Li, Chao& Hao, Guocai…[et al.]. 2019. A Method to Accurately Determine the Methane Enrichment Zone of a Longwall Coal Mine. Geofluids،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1152747
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Feng, Guorui…[et al.]. A Method to Accurately Determine the Methane Enrichment Zone of a Longwall Coal Mine. Geofluids No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1152747
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Feng, Guorui& Zhang, Ao& Hu, Shengyong& Guo, Xiangqian& Li, Chao& Hao, Guocai…[et al.]. A Method to Accurately Determine the Methane Enrichment Zone of a Longwall Coal Mine. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1152747
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1152747
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر