采区硐室U型钢支架壁后注浆机理研究及应用

 以裴沟煤矿42采区硐室群为研究背景，采用数值模拟、现场测试与试验相结合的研究方法，得出硐室群围岩稳定性特征及控制对策。利用地质雷达与钻孔窥视仪探测硐室群围岩松动圈发育情况；运用数值模拟软件UDEC分析了注浆的作用范围以及不同水灰比和注浆压力条件下浆液扩散规律。针对硐室群围岩岩性特点，提出U型钢支架壁后注浆一次支护技术，在此基础上，再进行永久支护。现场工业性试验结果表明，在采用合理支护方案后硐室群维护效果理想。

Study on Mechanism and Application of U-steel Support Backwall Grouting of Chamber Group

Chamber group in 42 mining district of Peigou mine was studied with the methods of numerical simulation and field test, to acquired the characteristics and control countermeasures of stability of chamber group. Geological radar and drilling peep instrument were used to test and judge the loosen zone of chamber group surrounding rock, and software UDEC was used to analyze the utilizing range of grouting and grout diffusion under different water cement ratio and injection pressure. According to the lithological characteristics of chamber group, the first support scheme of u-steel support backwall grouting was put forward. The industrial result showed that chamber group was effectively maintained after adopting rational support scheme.