【摘要】 为掌握无煤柱沿空留巷工作面采空区瓦斯运移规律，基于现场工程背景，采用数值模拟与现场实测联合分析方法，揭示密闭墙阻隔效应下切顶留巷相邻采空区瓦斯运移规律。研究结果表明：在密闭墙阻隔效应下采空区近留巷侧瓦斯显著聚集；构建“通风参数动态调节-局部抽采强化”协同技术体系，提出以主辅进风巷风量配比优化与留巷增设抽采管为核心的调控方案，其中配风比降低和留巷中部(距工作面200～220 m)增设瓦斯抽采管有利于控制回风隅角和沿空留巷的瓦斯体积分数，通过平衡采空区与工作面和巷道的压差，使工作面与留巷段最高瓦斯体积分数降幅分别为65.5%,24.0%,该技术经97312工作面工程验证，可推广至切顶留巷工艺的复杂地质条件。研究结果可为高瓦斯矿井通风安全提供理论支撑。更多还原

【Abstract】 In order to understand the gas migration patterns in the goaf of a working face with coal pillar-free retaining roadway along goaf, a combined approach of numerical simulation and field measurement is adopted based on actual engineering conditions.The study reveals the gas migration behavior in adjacent goafs under the barrier effect of the isolation wall.The results indicate that gas significantly accumulates near the retaining roadway side of the goaf due to the blocking effect of the isolation wall.A collaborative technical system of “dynamic adjustment of ventilation parameters-enhanced local gas drainage” is established.A regulation scheme is proposed, focusing on optimizing the airflow ratio between the main and auxiliary intake roadways and installing additional gas drainage pipes in the middle section of the retaining roadway along goaf(located 200～220 meters from the working face).Reducing the airflow ratio and installing gas drainage pipes in the central section of the retaining roadway are effective in controlling gas concentration in the return air corner and along the retaining roadway.By balancing the pressure differences between the goaf, the working face, and the roadway, the maximum gas concentrations in the working face and the retaining roadway section were reduced by 65.5% and 24.0% respectively.This technology has been successfully validated in the 97312 working face and can be extended to complex geological conditions such as the coal pillar-free retaining roadway along goaf mining method.The results can provide theoretical support for ventilation safety in high-gas coal mines.更多还原