厚煤层综放工作面动压影响巷道围岩补强加固技术研究

Reinforcement Technology of Roadway Surrounding Rock Influenced by Dynamic Pressure of Fully-mechanized Caving Face in Thick Coal Seam

以20102运输巷围岩控制工程为研究对象,对动压影响下巷道围岩变形特征进行了分析,发现运输巷围岩变形主要以顶板下沉、巷帮收敛为主。依据运输巷现场条件及围岩变形特征,制定了适合厚煤层动压影响巷道围岩的补强加固技术方案,并与原有支护体系相互配合,共同抵御强动压影响。工程应用后,在动压影响范围内20102运输巷顶底板、巷帮最大位移量分别为341、 492 mm,围岩变形量整体较小,可满足运输巷后续使用需求。

Taking the surrounding rock control project of 20102 transport roadway as the research object,the deformation characteristics of roadway surrounding rock under the influence of dynamic pressure were analyzed.It was found that the deformation of transport roadway surrounding rock was mainly caused by roof subsidence and roadway wall convergence.According to the field conditions of transportation roadway and deformation characteristics of surrounding rock,a reinforcing technical scheme suitable for roadway surrounding rock of thick coal seam the influenced by dynamic pressure was developed,and it was combined with the original supporting system to resist the influence of strong dynamic pressure.After the engineering application,the maximum displacement of the roof and floor of the 20102 transportation roadway and the roadway side within the influence range of dynamic pressure were 341 mm and 492 mm respectively,and the deformation of surrounding rock was small on the whole,which can meet the needs of the transportation roadway for subsequent use.