矸石膏体充填采场覆岩空间结构演变规律

Overlying strata spatial structure and its movement law in gangue backfill paste stope

为研究矸石膏体充填采场覆岩运动的问题,采用力学分析、相似材料模拟和现场监测的方法,研究了矸石膏体充填采场覆岩空间结构的演变规律.结果表明:矸石膏体充填采场覆岩存在3种结构,第一种结构为直接顶和基本顶均弯曲下沉型,第二种结构为直接顶断裂、基本顶弯曲下沉型,第三种结构为直接顶和基本顶均断裂型.相似材料模拟和现场实测还表明矸石膏体充填采场以第一种覆岩结构居多,第二种覆岩结构多发生在采空区封闭空间出现连续的漏浆事故之后,基本不存在第三种覆岩结构.

Overlying strata spatial structure and its movement law is researched with the method of mechanical analysis, similar material simulation and field monitoring for studying the overlying strata movement problem in gangue backfill paste stope. The results show that there are three overlying strata spatial structures, the immediate roof＇s and main roof＇s curve subsidence are the first type, the immediate roof＇s curve subsidence and the main roof＇s fracture are the second type, the immediate roof＇s and main roof＇s fracture are the third type. Similar material simulation and field monitoring also show that the first type overlying structure is primary, the second type overlying structure is in the second place and the third type overlying structure is seldom found, The second type occurs after the slurry is leaked continuously in the closed space.