为得到沿空留巷基本顶断裂的形式和条件,采用理论分析和现场观测的方法,以葛泉矿1528工作面沿空留巷为研究对象,建立了反映岩层基本特征的力学模型。结果表明:当沿空留巷巷旁支护阻力不同时,基本顶的断裂位置不同,在巷旁位置切断直接顶或者直接切断基本顶,可以减少顶板活动对巷道的影响。由工程监测和数据分析可知,沿空留巷受到采动影响时,采用合理的锚网支护措施可形成稳定结构,提供足够的切顶阻力,能有效控制顶板合理的悬露长度。

In order to obtain the main roof broken form and condition of the gateway retained along goaf,taking the gateway retained along goaf of No. 1528 coal mi ning face in Gequan Mine as the study object,the theoretical analysis and site observation method was applied to establish the mechanics model reflecting the basic fea tures of the strata.The results showed that when the support resistances of the sidewalls in the gateway retained along goaf were different,the main roof broken location would be different and the immediate roof cut at the gateway sidewall or the main roof directly cut could reduce the roof movement affected to the gateway.The enginee ring monitoring and measuring as well as the data analysis could understand when the gateway retained along goaf was affected by the mining influences,the rational b olt-steel mesh support measures could be applied to form stable structures,provide sufficient roof cutting resistance and effectively control the rational suspended lengt h of the roof.

中央高校基本科研业务费资助项目(AQ1202B)；