分层施工法在深井大硐室围岩动态控制中的数值模拟研究——以淮南张集矿硐室施工为例

Research of numerical simulation of excavation by layers in dynamic control of surrounding rock of deep well's large section cave

以淮南张集矿硐室施工为例,运用数值模拟计算了分层开挖法在深井大硐室围岩稳定性中的影响及控制方法,得到分层开挖的应力应变状态,开挖松动区的大小直接影响到支护参数。现场工业性试验监测表明了分层施工法在深井大硐室围岩稳定性中的优越性。

Taking Huainan Zhangji mine's cavern construction for example,this paper used the method of numerical simulation to do research into the influence and control method of excavation by layers in the stability of surrounding rock of deep well's large section cave,obtaining the stress- strain of excavation in layers,which shows that the size of excavation area directly influences the supporting parameter. The on- the- site industrial test monitoring shows that excavation by layers has advantages in the stability of surrounding rock of deep well's large section cave.