充填开采连续曲形梁时空特性研究

摘要

In order to master the time and space characteristics of backfill mining continuous curved beam in the process of formation,development and stability,the time-dependent variable in the theoretical and engineering formula was researched deeply and the mathematical relationship between deformation of continuous curved beam and time was resulted.And then two-dimensional similar material test was conducted to simulate time and space evolution of strata movement under backfilling mining condition,describing the displacement distribution characteristics of continuous curved beam as time goes by,based on which the time and space relationship among roof subsidence,sinking speed,backfilling body compression speed,working face advancing speed and dynamic deformation of continuous curved beam was made clear.Understanding the behavior of continuous curved beam within time and space can provide design basis for backfilling mining process well.%为掌握充填开采采动影响范围内连续曲形梁从形成、发展到稳定过程中的时空特性,对基于力学分析得出的理论解和工程解之中与时间相关的变量进行深入研究,得到了连续曲形梁变形与时间的对数函数关系.进而采用二维相似试验模拟了不同充填条件下覆岩移动的时空演化过程,描述连续曲形梁位移分布特征及随时间延续的变形规律,从而确定顶板下沉量和下沉速度、充填体压缩及工作面推进速度、连续曲形梁的曲率动态变化与开采速度等各类相关参数之间的时空关系,为深入地理解连续曲形梁在时空维度的力学行为,为充填开采覆岩移动控制工艺提供优化设计依据.