特厚煤层大断面矩形煤巷围岩力学特征及控制

Mechanical characteristics and stability control of surrounding rock for large section coal roadway in extremely thick seam

通过对沿特厚煤层底板掘进的大断面矩形煤巷开挖后围岩应力演化特征、变形破坏规律的分析,揭示了大断面矩形煤巷稳定性控制机理。由此提出了大断面矩形煤巷锚网索喷钢带联合支护技术,并在实施过程中通过监测的量化信息适时改进。工程实践证明,该技术能够较好地控制大断面矩形煤巷的围岩变形。

By the analysis of stress evolving characteristics, deformation failure laws of coal roadway surrounding rock in extremely thick seam, the paper revealed the stability control mechanism of large section and rectangular coal roadway, proposed the combined support- ing technology of boh-mesh-anchor-spout-beh for large section and rectangular roadway. Engineering practice proved that the technology can better control surrounding rock deformation of large section rectangular roadway.