Assessment and control of the mine tremor disaster induced by the energy accumulation and dispersion of thick-hard roofs  

作　　者：Bin Yu Mingxian Peng Yang Tai Shuai Guo 

机构地区：[1]State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China [2]School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China [3]School of Mines,China University of Mining and Technology,Xuzhou 221116,China

出　　处：《International Journal of Mining Science and Technology》2024年第7期925-941,共17页矿业科学技术学报（英文版）

基　　金：supported by the Chongqing Postdoctoral Special Support(No.2022CQBSHTB1022);the Autonomous General Projects of State Key Laboratory of Coal Mine Disaster Dynamics and Control(No.2011DA105287-MS202209);the State Key Laboratory of Coal Mine Disaster Dynamics and Control Faces the 2030 project(No.2011DA105287-MX2030-202002).

摘　　要：In order to solve the problem that current theory models cannot accurately describe thick-hard roof(THR)elastic energy and assess the mine tremor disasters,a theoretical method,a Timoshenko beam theory on Winkler foundation was adopted to establish the THR’s periodic breaking model.The superposition principle was used for this complex model to derive the calculation formulas of the elastic energy and impact load on hydraulic supports.Then,the influence of roof thickness h,cantilever length L_(1),and load q on THR’s elastic energy and impact load was analyzed.And,the effect of mine tremor disasters was assessed.Finally,it is revealed that:(1)The THR’s elastic energy U exhibits power-law variations,with the fitted relationships U=0.0096L_(1)^(3.5866^),U=5943.9h^(-1.935),and U=21.049q^(2).(2)The impact load on hydraulic supports F_(ZJ) increases linearly with an increase in the cantilever length,thickness,and applied load.The fitted relationships are F_(ZJ)=1067.3L_(1)+6361.1,F_(ZJ)=125.89h+15100,and F_(ZJ)=10420q+3912.6.(3)Ground hydraulic fracturing and liquid explosive deep-hole blasting techniques effectively reduce the THR’s cantilever length at periodic breakages,thus eliminating mine tremor disasters.

关 键 词：Dynamic disaster Energy Hard and thick roof Timoshenko beam 

分 类 号：TD327.2[矿业工程—矿井建设]