【摘要】 基于对高承压水、岩层性质诱发底板突水机制的认识,针对高承压水上采煤的岩体力学模型,应用FLAC3D数值分析软件分析了高水压影响下采场底板随工作面推进的突水通道形成与动态演化过程。通过对不同底板水压和隔水层的模拟,验证了在应力场和渗流场耦合条件下底板破坏过程和突水通道形成演化规律,数值分析结果表明:底板突水通道的形成过程也是底板破坏的过程,是应力场与渗流场耦合条件下共同作用的结果,突水通道的形成与演化过程受水压、隔水层性质等因素影响,水压大、隔水层岩性较差、工作面推进距离大,则有利于通道形成与演化。更多还原

【Abstract】 Based on the inducement mechanism of floor water inrush by high confined water and rock nature,and aimed at establishing rock mass mechanical models,numerical simulation tests with FLAC3 Dare conducted to investigate the formation and evolution of water-inrush channel advancing with workface in high water pressure mining.Simulations of different floor water pressures and confining beds verified the floor crack process and water-inrush channel evolution laws under coupling of stress field and seepage field.The results show that the formation of floor water-inrush channel also indicates floor crack,the result of the interaction between stress field and seepage field.Affected by water pressure,aquifuge nature and other factors,the formation and evolution of water-inrush channel is easier to be achieved when there are high water pressure,poor rock aquifuge and large workface advance.更多还原