彭庄煤矿主排水泵房的整体加固技术与数值模拟

Integrated Reinforcement Technology and Numerical Simulation of Main Water Drainage Pumping Chamber in Pengzhuang Coal Mine

在对彭庄煤矿主排水泵房基础的加固治理中,当泵基础遇到煤层时,采用混凝土置换煤层以弥补煤层强度的不足,确保了泵房基础的持久稳定;在泵房吸水井、配水井和配水巷的施工中,采用了强抗微让的整体加固方案,有效防止了泵房主硐室一侧下沉;基于FLAC3D软件对加固方案进行了数值模拟,并对泵房围岩收敛变形和深部位移进行了长期监测,监测结果表明围岩收敛变形量仅为2mm,深部围岩未发生位移,泵房硐室整体一直保持稳定。

During the reinforced treatment of the foundation for the main water drainage pumping chamber in Pengzhuang Mine,when the pump foundation was in the seam,a concrete foundation was replaced to the seam in order to make up the shortage of the seam strength and to ensure the sustainable stability of the pumping chamber foundation.During the constructions of the water pumping well in the water pumping chamber,water distribution well and water distribution gateway,an integrated reinforced plan with hard resistance and micro yield was applied to be effective to prevent one side subsidence of the pumping main chamber.Based on the FLAC3D software,a numerical simulation was conducted on the reinforced plan and a long term monitoring and measuring was conducted on the surrounding rock convergence deformation and the deep displacement of the pumping chamber.The monitoring and measuring results showed that the convergence deformation of the surrounding rock was only 2 mm,there was no displacement in the deep surrounding rock and the integration of the pumping chamber could be keep stable.