高水平应力跨采巷道围岩控制技术

Surrounding Rock Control Technology of Roadway in High Horizontal Stress Influenced by Overhead Mining

为了提高受高水平应力和采动影响巷道围岩的稳定性,利用相似材料模拟试验方法研究了采用不同支护方式的巷道,在不同水平载荷下的变形破坏特征。然后运用FLAC3D数值模拟软件,研究受上方工作面回采影响的巷道在不同支护方式下,工作面推进至距巷道中线不同位置时,巷道围岩位移的变化规律。结果表明,锚网索喷+注浆支护能显著减小顶板下沉量和提高围岩自承能力。

In order to improve the stability of roadway influenced by horizontal stress and overhead mining, deformation and failure char- acteristics of the roadway with different support patterns were firstly studied by similar simulation test in the condition of different hori- zontal loads. Then when the working face was at different distances from the central line of the roadway, the changing laws of sun＇ound- ing rock displacement of roadway with different support patterns which were influenced by overhead mining were analyzed with simula- tion software FLAC3D. The result indicates that bolting and shotcreting with mesh ＋ grouting support can greatly reduce roof conver- gence and raise self - supporting properties of surrounding rocks.