底板陷落柱突水力学机理研究及应用

导水陷落柱给矿井安全开采带来较大隐患,对陷落柱突水机理的分析十分必要。在工程实际中,大部分陷落柱为"下大上小"的不规则圆台形,为了与工程实际更接近,将陷落柱模型简化为圆台形,利用摩尔—库伦强度准则和极限平衡理论,对底板陷落柱突水的力学机理进行分析,求出了底板突水的极限承压水压力,并对某矿底板突水进行了预测,提出了预防措施。

Research on Mechanism of Water Inrush from Floor Subsided Column and Its Application

The water-conducting subsided columns often bring larger hidden troubles to safe production in coal mines, so it is very necessary to analyze the mechanism of water inrush from subsided columns. In engineering practice, most of subsided columns are in irregular frustum form, in this study, the subsided column model was simplified as a frustum form so as to make it closer to the engineering practice, the Mohr-Coulomb strength criterion and the Limit Equilibrium theory were used to analyze the water inrush mechanism from the floor subsided columns, the limited water pressure of water inrush from the floor was solved, the water inrush from floor in a mine was predicted, and some preventive measures were put forward.