|
|
|
| Deformation and failure characteristics of large cross-section roadway and application of support design |
| Shi Xinyu |
| No.1 Coal Mine of Shaanxi Shaanmei Huangling Mining Co., Ltd., Huangling, Yan’ an 727307, China |
|
|
|
|
Abstract Aiming at the difficult problem of supporting large cross-section roadway under rapid excavation in a coal mine, No.1010 return air drift of No.1 Coal Mine Huangling Mining Co., Ltd. was taken as the research object, the deformation and failure characteristics of large cross-section roadway are analyzed by method of combining numerical simulation and theoretical calculation, and the roadway support scheme was given and the stability was verified. The results showed that under the condition of unsupported large-section roadway, the area of large deformation of surrounding rock was large, the shear stress was concentrated at the shoulder and bottom corners, and the plastic failure range was large. According to the limit equilibrium theory and numerical simulation results, the support method of left-handed screw steel bolt, metal mesh, metal beam, and anchor cable was adopted. After the support, the roadway bolt and cable effectively prevented the deformation and damage of the rock stratum, controlled the roof subsidence, limited the deformation of the two sides, prevented the occurrence of floor heave, and provided a guarantee for safe and efficient mining of the mine.
|
|
|
|
|
|
| [ 1 ] 康红普，王金华.煤巷锚杆支护理论与成套技[ M ]. 北京：煤炭工业出版社，2007.
[ 2 ] 贾 飞. 张家峁矿厚煤层大断面巷帮破坏机制及围岩稳定性控制[ D ]. 徐州：中国矿业大学，2019.
[ 3 ] 杨军辉，蒋再胜，谢生荣. 深部大断面巷道交叉点围岩稳定性分析及控制技术[ J ]. 煤炭科学技术，2020，48（ 6 ）：49 - 56.
[ 4 ] 王志诚. 煤矿大断面巷道掘进支护技术的设计与应用[ J ]. 现代工业经济和信息化，2022，12（ 6 ）：344 - 346.
[ 5 ] 刘锦荣，康庆涛. 大断面软煤层大巷围岩控制优化设计[ J ]. 采矿与安全工程学报，2013，30（ 6 ）：836 - 840. |
|
|
|
