中文摘要：

为了分析深埋薄基岩煤层采场压架致灾机理,采用物理实验、数字图像处理技术、现场实测等综合研究方法,对淮南矿区深埋薄基岩煤层采场顶板破断特征及机制进行了探讨。得出了在松散承压含水层载荷传递作用下,深埋薄基岩采场顶板破断存在大、小周期来压现象;薄基岩煤层采场上方存在着一倾斜块体承载区,在承担上覆岩层载荷的同时向低位岩层传递压力;低位关键层破断时形成采场小周期来压,之后由于力的传递作用,导致上覆岩层内部原生裂隙扩展、次生裂隙发育,倾斜块体承载能力弱化,其范围向着更高更宽方向发展,当高位关键层破断时倾斜块体承载区达到最大,形成采场大周期来压;大周期来压时易发生采场压架致灾事故。

英文摘要：

To clarify the mechanism of shields crushing disaster when mining the deep-buried coal seam with thin bedrock, research methods including physical experiment, digital image processing technology, field measurement, etc. are used to study the characteristics and mechanism of stope roof fracture in deep-buried coal seam with thin bedrock in Huainan coal field. The results show that both the big periodic ground pressure and the small one do exist once the stope roof in deep-buried coal seam with thin bedrock is broken under the condition of load transfer from the unconsolidated confined aqui- fer; there is an inclined block bearing zone over the stope in coal seam with thin bedrock, which trans- fers the pressure to the lower strata and carries the overlying strata loading. When the low key strata breaks, the small periodic ground pressure could be formed. Due to the effect of pressure transfer, the original fissures is propagated and the secondary fissures is developed in overlying strata. The inclined block bearing capacity is weakened. The development of fissures expands effecting the higher and wider strata zones. When the primary key stratum breaks, the inclined block bearing zone reaches the maxi- mum size and the big periodic ground pressure is formed. It is easy to make the shield crushing accident happen during the time of big periodic ground pressure.