典型文献
Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam mining
文献摘要：
This work aimed at revealing the mechanism of strong ground pressure behaviour(SGPB)induced by high-position hard roof(HHR).Based on the supporting structures model of HHR,a modified voussoir beam mechanical model for HHR was established by considering the gangue support coefficient,through which the modified expressions of limit breaking span and breaking energy of HHR were deduced.Combined with the relationship between the dynamic-static loading stress of supporting body(hydraulic support and coal wall)and its comprehensive supporting strength,the criteria of ground pressure beha-viour(GPB)induced by HHR were discussed.The types of Ⅰ1,Ⅰ2,Ⅱ1,and Ⅱ2 of GPB were interpreted.Results showed that types Ⅰ1 and Ⅰ2 were the main forms of SGPB in extra-thick coal seam mining.The main manifestation of SGPB was static stress,which was mainly derived from the instability of HHR rather than fracture.Accordingly,an innovative control technology was proposed,which can weaken sta-tic load by vertical-well separated fracturing HHR.The research results have been successfully applied to the 8101 working face in Tashan coal mine,Shanxi Province,China.The results of a digital borehole cam-era observation and stress monitoring proved the rationality of the GPB criteria.The control technology was successful,paving the way for new possibilities to HHR control for safety mining.
文献关键词：
中图分类号：
作者姓名：
Chao Pan;Binwei Xia;Yujun Zuo;Bin Yu;Changnan Ou
作者机构：
Mining College,Guizhou University,Guiyang 550025,China;National&Local Joint Engineering Laboratory of Gas Drainage in Complex Coal Seam,Chongqing University,Chongqing 400044,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China
文献出处：
引用格式：
[1]Chao Pan;Binwei Xia;Yujun Zuo;Bin Yu;Changnan Ou-.Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam mining)[J].矿业科学技术学报（英文版）,2022(03):499-511
A类：
SGPB,voussoir,Tashan
B类：
Mechanism,control,technology,strong,ground,pressure,behaviour,induced,by,high,position,hard,roofs,extra,thick,coal,seam,mining,This,aimed,revealing,mechanism,HHR,Based,supporting,structures,model,modified,beam,mechanical,was,established,considering,gangue,coefficient,through,which,expressions,limit,breaking,span,energy,were,deduced,Combined,relationship,between,dynamic,static,loading,stress,body,hydraulic,wall,its,comprehensive,strength,criteria,discussed,types,interpreted,Results,showed,that,forms,manifestation,mainly,derived,from,instability,rather,than,fracture,Accordingly,innovative,proposed,can,weaken,vertical,well,separated,fracturing,research,results,have,been,successfully,applied,working,face,mine,Shanxi,Province,China,digital,borehole,cam,era,observation,monitoring,proved,rationality,paving,way,new,possibilities,safety
AB值：
0.498988
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