【摘要】 为优化深部矿井切顶卸压沿空留巷稳定性，以淮南新集一矿360606工作面为依托，聚焦其全生命周期底鼓演化规律并提出防治策略，综合运用理论分析、力学建模与FLAC^3D数值模拟手段展开研究，理论分析揭示了各阶段底鼓机理，掘巷阶段因应力重新分布，底鼓量为118 mm;一次采动阶段，受支承压力影响，底鼓量增至351.6 mm;二次采动阶段，基本底弯曲失稳，底鼓量达836.9 mm。数值模拟结果显示，二次采动时垂直应力峰值达44 MPa,塑性区扩展至超前工作面40 m,高应力集中与塑性区扩展加剧底鼓。基于此，提出“超前—滞后—稳定”分阶段协同控制策略，并确定切顶参数优化应力场。现场应用后，底鼓量降至474 mm,相比理论值降低43.3%,有效控制了巷道变形。更多还原

【Abstract】 To optimize the stability of gob-side entry retaining by roof cutting and pressure relief in deep mines, based on the 360606 working face of Huainan Xinji No.1 Coal Mine, we focused on the full-lifecycle evolution law of floor heave in the entry and proposed control strategies.A comprehensive approach involving theoretical analysis, mechanical modeling, and FLAC^3D numerical simulation was employed.Theoretical analysis revealed the mechanism of floor heave at each stage: during roadway excavation, due to stress redistribution, the floor heave was 118 mm; during primary mining, influenced by abutment pressure, it increased to 351.6 mm; during secondary mining, due to bending instability of the immediate floor, it reached 836.9 mm.Numerical simulations indicated that during secondary mining, the peak vertical stress reached 44 MPa, and the plastic zone extended to 40 m ahead of the working face, with high-stress concentration and plastic zone expansion exacerbating floor heave.Based on these findings, a “advanced-lagged-stabilized” phased collaborative control strategy was proposed, and roof cutting parameters were optimized to adjust the stress field.After on-site application, floor heave was reduced to 474 mm, representing a 43.3% decrease compared to the theoretical value, the roadway deformation was effectively controlled.更多还原