鸟笼式灌浆预应力锚索治理底鼓的研究与应用

摘要

This text takes the fall to pieces round rock of Wuyang Coal Mine 76 Roadway maintenance technique as an example, from improving the structure and the strengthen of surrounding rock. Under the condition of original support, it put forward the project of application bolt and grouting reinforcement in 76roadway. It expatiates on the structure, specification and construction technology of the birdcage counter bolt and analyses the concentration of concrete grouting and the effect of grouting pressure to diffusion limits with the numerical simulation software UDEC. It tkes greatly good practice effect with current test and application.%本文以五阳煤矿76架空人车巷机头处底板强烈底鼓区域修复为例，从改善岩石结构，提高围岩整体强度的角度出发，提出了鸟笼式灌浆预应力锚索加固的方案。对鸟笼式锚索的结构、技术参数、施工工艺作了详尽的论述，并用数值模拟软件 UDEC 模拟分析注水泥浆液浓度与注浆压力对浆液扩散范围的影响。通过现场试验与应用，取得了良好的实际效果。