中关铁矿堵水帷幕模型的建立及其稳定性分析

为保护地下水资源，合理开发矿产资源，采用全封闭的注浆堵水帷幕堵截地下水是保证大水矿山正常开采的一种有效的技术措施。在井巷施工及矿体开采过程中，需对帷幕内围岩进行疏干排水，随着疏干排水的进行，势必会在帷幕内外形成一定的水力梯度，这将对帷幕的稳定性产生很大的不利影响。结合中关铁矿注浆堵水帷幕工程，根据矿区的水文地质资料、工程地质资料和钻孔资料，建立堵水帷幕区域的三维地质模型、三维可视化模型和三维力学计算模型，并对帷幕内围岩疏干排水引起的应力响应进行分析。结果表明：疏干排水使堵水帷幕区域的应力场发生了明显的改变，疏干排水对西侧和西南侧帷幕的扰动较为明显。

Establishment of the Plugging Curtain Model in Zhongguan Iron Mine and Its Stability analysis

To protect underground water resource and rationalize the mineral resource，the measures which adopt totally closed curtain grouting to block groundwater are stable and effective to ensure exploitation of underground ore deposit.During the tunnel construction and ore mining，water drainage for surrounding rocks within curtain is required.With the water drainage ongoing，both inside and outside of the curtain will produce a certain hydraulic gradient，which will negatively affect the stability of the curtain area.By combining the water plugging curtain grouting engineering of Zhongguan iron mine，a three-dimensional geological model，3D visualization model and 3D mechanical model of the water shutoff curtain area was established based on hydrogeological data，engineering geological data and drilling data.Then，stress response caused by water drainage within the curtain wall rock is analyzed.The results showed that:water draining makes the stress field in plugging curtain region change obviously，and brings a great disturbance in west side and southwest side of the curtain.