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

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

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
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 the-ory on Winkler foundation was adopted to establish the THR's periodic breaking model.The superposi-tion 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 L1,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=0.0096L13.5866,U=5943.9h-1.935,and U=21.049q2.(2)The impact load on hydraulic supports FZJ increases linearly with an increase in the cantilever length,thickness,and applied load.The fitted relationships are FZJ=1067.3L1+6361.1,FZJ=125.89h+15100,and FZJ=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.

Dynamic disasterEnergyHard and thick roofTimoshenko beam

Bin Yu、Mingxian Peng、Yang Tai、Shuai Guo

展开 >

State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China

School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China

School of Mines,China University of Mining and Technology,Xuzhou 221116,China

Chongqing Postdoctoral Special SupportAutonomous General Projects of State Key Laboratory of Coal Mine Disaster Dynamics and ControlState Key Laboratory of Coal Mine Disaster Dynamics and Control Faces the 2030 project

2022CQBSHTB10222011DA105287-MS2022092011DA105287-MX2030-202002

2024

10.1016/j.ijmst.2024.07.009

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2024.34(7)