破碎煤岩体注浆加固效果综合评价技术及应用

破碎煤岩体注浆加固对于控制围岩稳定具有重要意义，注浆效果检测是保证注浆工程达到要求的重要环节。采用浆液填充率法、力学参数法、分段注水法、地质雷达法、钻孔电视法、取心检查法对评价指标进行定量化分析，提出了注浆效果综合评价表，并进行了应用研究。研究结果表明:浆液填充率、取心率要达到90%以上；注浆后其抗压强度、抗折强度至少分别达到未受影响的80%、75%；孔隙率应低于10%；地层钻孔漏失量低于4 L/min；地层煤岩体中仅存在少量大于1 mm的裂隙；巷道最大变形量不影响巷道正常使用，证实了注浆效果综合评价表的有效性。 

Comprehensive evaluation technology and application of grouting reinforcement effect for broken coal and rock mass

Grouting reinforcement of broken coal and rock mass plays an important role in controlling the stability of surrounding rocks, and the grouting effect detection is an important link to ensure the grouting engineering to meet the requirements. The evaluation index was quantitatively analyzed by slurry filling rate method, mechanical parameter method, segmented water injection method, geological radar method, drilling television method and core inspection method. The comprehensive evaluation form of grouting effect was put forward, and the application research was carried out. The results show:The rate of filling slurry and coring was more than 90%; After grouting, the compressive strength and flexural strength were more 80% and 75% before mining respectively; The porosity was less than 10%; The borehole leakage was less than 4 L/min; There was only few big size(> 1mm) fracture; The most large deformation did not affect the use of normal roadway, this confirmed comprehensive grouting effect checking and evaluating form were effective.