【摘要】 针对水泥基-玻璃纤维浆液注浆堵水可行性问题,借助理论分析、数值模拟、工程试验相结合的技术手段,对水泥基-玻璃纤维浆液治理突水灾害进行了全面、深入的研究。研究水泥基-玻璃纤维浆液对调节裂隙发展的机理,以及浆液的掺入对岩体弹性模量、黏聚力和内摩擦角的影响;通过数值模拟方法,分析注浆效果,结合实际工程的涌水量监测和围岩变形监测,验证模拟的准确性。主要结论为:①玻璃纤维的存在使裂缝产生的应力发展得到减缓,并使尖端应力强度因子减弱;②对比分析隧道注浆前后的数值模拟结果,得到不同工况下围岩衬砌的竖向、水平位移值;③通过对比工程试验数据与模拟结果,证明了水泥基-玻璃纤维浆液实际应用的可行性。更多还原

【Abstract】 The feasibility of treating water burst using cement-based fiber glass slurry is investigated via theoretical, numerical, and engineering approaches. The crack control mechanism as well as the influence of slurry on the elastic modulus, cohesion, and internal friction angle of rock are examined. Moreover, the validity of the numerical simulation is obtained according to monitoring results of water burst and surrounding rock deformation. Results evince that fiber glass attenuates the stress development of cracks and reduces the stress intensity factor at the tip of crack. In addition, the vertical and horizontal displacements of surrounding rock in different working conditions are acquired according to comparative analysis before and after grouting. Cement-based glass fiber slurry is manifested to be feasible through engineering test and data analysis of the simulation results.更多还原