窄煤柱强矿压沿空掘巷巷道围岩控制技术

Surrounding rock control technology of gob-side entry with narrow coal

采用数值模拟配合现场实测的方法,研究了巷道围岩应力、围岩内部裂隙的分布及其演化规律。通过对两侧沿空巷道大、小结构的形成机制、运动方式和特点分析,揭示了上覆岩体大结构与小结构稳定性的原理及其对巷道稳定的影响,由此得出了保证煤柱内强矿压巷道围岩稳定的控制机理。同时采用理论分析和数值计算的方法,确定了窄煤柱内强矿压巷道的合理层位和位置,提出了针对煤柱内强矿压巷道的高强度锚网索支护技术体系,并在330辅助回风巷进行应用。

Use of numerical simulation with field measurement methods, studies the roadway stress, internal distribution and evolution of rock fissures. Through the big sides along the roadway, the formation mechanism of small structures, movement pattern and characteristics analysis revealed a large structural principle of the overlying rock and small structural stability and stabilizing influence on the roadway, which is proposed to ensure that coal strong pressure mine roadway stability control mechanism of the column. While using theoretical analysis and numerical calculation method to determine the strong pillar in the thick coal mine roadway reasonable pressure horizons and location for the proposed roadway pressure inside strong pillar mining of high-strength steel mesh and anchor support technology system, and 330 were assisted return airway industrial test.