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为探讨深井巷道涌水渗流场-应力场演化。依托具体工程,选取深井巷道涌水区域,建立区域内渗流场-应力场耦合的地质力学模型。基于COMSOL有限元分析,研究深井巷道涌水区域渗流场与应力场变化特点。结果表明:巷道涌水区域形成一定范围内的降落漏斗,靠近降落漏斗处动水压力变化梯度较大,远离降落漏斗处水压力保持不变。在动水压力和高地应力的综合作用下,巷道顶板围岩变形量最大,且应力集中在顶板、底板位置,极易引起底板底臌现象。现场采用先引流泄压后浅层加固措施确保了浅层加固效果,合理控制深部引排钻孔,最后进行深部帷幕注浆有效封堵涌水通道。结合巷道顶板围岩变形实时监测并及时反馈,实现信息化施工,有效保证注浆过程中围岩稳定。并在工程实践中进行了应用,取得显著效果。
In order to discuss the seepage-stress field evolution of gushing waterway in deep mine roadway. Relying on specific engineering, the water inrush of deep roadway is selected to establish the geomechanical model of seepage-stress field coupling in the area. Based on the finite element analysis of COMSOL, the characteristics of seepage field and stress field in the gushing tunnel of deep mine roadway are studied. The results show that: the tunnel water gushing area forms a certain range of falling funnels, the gradient of moving water pressure near the falling funnel is larger, and the water pressure away from the falling funnel remains unchanged. Under the combined action of hydrodynamic pressure and high ground stress, the deformation of surrounding rock of roadway roof is the largest, and the stress is concentrated on the position of roof and floor, which can easily cause the phenomenon of bottom floor 臌. The site adopts shallow reinforcement measures to ensure the shallow reinforcement effect, reasonable control of the deep drainage and drainage holes, and finally the deep curtain grouting to effectively block the gushing channel. Combined with real-time monitoring of surrounding rock deformation of roadway roof and timely feedback to achieve information technology to effectively ensure the stability of surrounding rock during grouting. And in engineering practice has been applied, and achieved remarkable results.