典型文献
Development of 3D top coal caving angle model for fully mechanized extra-thick coal seam mining
文献摘要：
During high-intensity,fully mechanized mining of extra-thick coal seam,the top coal would cave to a cer-tain 3D form.Based on the data collected during drilling,a 3D model of top coal caving surface space was established to determine the relationship between the location of the stope roof and the caving surface,enabling the mathematical computation of the top caving angle(ψ).The drilling method was employed to measure the top caving angle on two extra-thick fully mechanized coal caving faces under the conditions of three geological structures,namely,no geological structure,igneous rock structure,and fault structure.The results show that the value of top caving angle could be accurately estimated on-site with the 9-parameter 3D top coal caving surface model built with the drilling method.This method is a novel on-site measurement that can be easily applied.Our findings reveal that the characteristics of the coal-rock in the two mining faces are different;yet their caving angles follow the rule ψigneous rock structure＜ψno geological structure＜ψfault structure.Finally,through the data fitting with two indexes(the top coal uniaxial compressive strength and the top caving angle),it is found that the relationship between the two indexes satisfies an exponential decay function.
文献关键词：
中图分类号：
作者姓名：
Hongfei Duan;Lijuan Zhao;Haiyan Yang;Yao Zhang;Hongchun Xia
作者机构：
China University of Mining and Technology,Xuzhou 221116,China;Jinneng Holding Group,Taiyuan 030000,China;College of Coal Engineering,Shanxi Datong University,Datong 037000,China;College of Civil and Architectural Engineering,Dalian University,Dalian 116622,China
文献出处：
引用格式：
[1]Hongfei Duan;Lijuan Zhao;Haiyan Yang;Yao Zhang;Hongchun Xia-.Development of 3D top coal caving angle model for fully mechanized extra-thick coal seam mining)[J].矿业科学技术学报（英文版）,2022(05):1145-1152
A类：
caving,stope
B类：
Development,coal,model,fully,mechanized,extra,thick,seam,mining,During,high,intensity,would,cave,cer,tain,form,Based,data,collected,during,drilling,surface,space,was,established,determine,relationship,between,location,roof,enabling,mathematical,computation,method,employed,two,faces,under,conditions,three,geological,structures,namely,igneous,rock,fault,results,show,that,value,could,accurately,estimated,site,parameter,built,This,novel,measurement,can,easily,applied,Our,findings,reveal,characteristics,are,different,yet,their,angles,follow,rule,Finally,through,fitting,indexes,uniaxial,compressive,strength,found,satisfies,exponential,decay,function
AB值：
0.418105
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