摘要
以某矿上组煤一采区回风大巷穿层4号煤层为背景,基于能量耗散理论进行巷道围岩松动圈范围研究分析,基于能量平衡方程和围岩松动圈能量分析理论建立拱形巷道能量耗散力学模型,确定巷道围岩松动圈破坏范围与能量耗散量呈正相关关系。基于摩尔-库伦应变软化本构模型,开发了基于FLAC3D软件能量耗散fish程序并进行数值模拟,确定了模型巷道能量耗散范围平均为5.9 m,结合现场钻孔成像试验,确定了大巷围岩松动圈破坏范围分别为5.9 m和6.04 m,证明了能量耗散理论能够较好适用于围岩松动圈范围的分析研究。
Taking the No.4 coal seam in the return air roadway in the upper formation No.1 coal mining area of a mine as the back-ground,based on the energy dissipation theory,the energy dissipation mechanical model of arch roadway was established based on the energy balance equation and the energy analysis theory of surrounding rock loose circle,and the failure range of surrounding rock loose circle was positively correlated with the energy dissipation.Based on the Moore-Coulomb strain softening constitutive model,the energy dissipation fish program based on FLAC3D software was developed and numerical simulation was carried out,and the average energy dissipation range of the roadway in the model was determined to be 5.9 m.Combined with the field drilling ima-ging test,the failure range of the loose ring of the surrounding rock of the roadway was determined to be 5.9 m and 6.04 m respect-ively.The above content proves that the energy dissipation theory can be well applied to the analysis of the loose zone of surround-ing rock.
作者
石磊
武超
吕冬
卢卫永
王鹏
孙耀辉
SHI Lei;WU Chao;LYU Dong;LU Weiyong;WANG Peng;SUN Yaohui(Department of Resources and Mechanical Engineering,Lyuliang University,Lyuliang 033001,China;Lyuliang Engineering Research Center of Intelligent Coal Mine,Lyuliang 033001,China;Department of Water Resources and Hydropower Engineering,Tsinghua University,Beijing 100084,China;Inner Mongolia Energy Group Co.,Ltd.,Hohhot 010090,China;Inner Mongolia Tongsheng Selian Coal Development Co.,Ltd.,Ordos 014399,China;Lyuliang Engineering Research Center of Intelligent Mine,Lyuliang 033001,China;College of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056000,China)
出处
《煤矿安全》
CAS
北大核心
2024年第10期150-157,共8页
Safety in Coal Mines
基金
山西省高等学校科技创新计划创新平台资助项目(2022P024)
吕梁市平台基地建设资助项目(2021GCZX-1-46)
吕梁市高新领域重点研发资助项目(2022GXYF08)。
关键词
能量耗散
围岩松动圈
FLAC3D二次开发
应变软化模型
钻孔成像
energy dissipation
surrounding rock loose zone
FLAC3D secondary development
strain softening model
borehole imaging
