Longwall top coal caving design for thick coal seam in very poor strength surrounding strata
作者机构：Mining Engineering DepartmentFaculty of MinesIstanbul Technical UniversityIstanbulTurkey
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2021年第8卷第4期
页 面：641-658页
核心收录：
学科分类：081901[工学-采矿工程] 0808[工学-电气工程] 0819[工学-矿业工程] 08[工学] 0807[工学-动力工程及工程热物理]
基 金：The paper includes the outputs of the MSc dissertation of Mr. H. Jangara that accomplished for the design of longwall mining systems at Alpu lignite field by the courtesy of Eczacibasi Esan Company which is the owner of the project site. The authors would like to thank the Company for their support and their consent for the research
主 题：Coal Geotechnics Ground control Longwall mining Numerical methods
摘 要：Alpu lignite field is an important coal deposit with nearly 2 billion tons of coal resources located in the middle of *** mine deposit consists of three main *** thickness of two of them vary from 4 to 30 *** surrounding rock mass is very poor in terms of *** high clay content and weak rock mass make mechanized mining *** this research,applicability of the longwall top coal caving method was *** very weak strength behavior of the coal and the surrounding strata increases the importance of research in the mine site in terms of ground *** aim is to design the mechanized longwall mine based on ground control *** of all,classification of the roof,coal,inter-burden,and floor strata were classified based on geotechnical ***,cavability index,shield,and floor bearing capacity were *** methods were applied to understand the limitations of a mechanized system that is very critical due to the very low strength *** to the main results,roof strata was classified as immediately caving while mining height was calculated as 5-6 ***,the relations among geotechnical characterizations of roof and floor strata,cutting and caving heights,and required shield capacity were presented based on analytical and numerical *** proposed approach can be used as a ground control method for the applicability as well as the limitations of mechanized longwall mining design in weak strata conditions.
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