不同杆体外形树脂锚杆锚固与安设性能对比试验研究

采用实验室试验的方法研究了目前煤矿巷道支护常用的5种不同杆体外形树脂锚杆的锚固性能、树脂锚固剂搅拌均匀性、搅拌扭矩和搅拌推力。研究结果表明：5种锚杆在125 mm锚固长度下抗拔力均在170 kN以上;精轧右旋全螺纹锚杆搅拌效果差，锚固段中多处出现空洞或杆体与锚固剂分离现象;搅拌扭矩阻力最小的为细肋左旋无纵肋螺纹钢锚杆，精轧右旋全螺纹粗牙锚杆、新型低宽肋左旋锚杆、精轧右旋全螺纹细牙锚杆、普通左旋无纵肋螺纹钢锚杆分别是它的1.16倍、1.18倍、1.24倍和1.65倍;锚杆安装推力最小的为精轧右旋全螺纹粗牙锚杆，新型低宽肋左旋锚杆、精轧右旋全螺纹细牙锚杆、细肋左旋无纵肋螺纹钢锚杆、普通左旋无纵肋螺纹钢锚杆分别是它的1.75倍、1.85倍、2.7倍和2.5倍;在全长锚固情况下，精轧右旋全螺纹粗牙锚杆和精轧右旋全螺纹细牙锚杆在安装时需要1～2个工人才能完成安装，新型低宽肋左旋锚杆需要2～3个工人才能完成安装，细肋左旋无纵肋螺纹钢锚杆和普通左旋无纵肋螺纹钢锚杆需要3～4个工人才能完成安装。虽然新型低宽肋左旋锚杆在锚固性能和安装性能上明显优于目前常用的左旋无纵肋螺纹钢锚杆，但还存在一定的优化空间，特别是在横肋宽度和高度方面。

Comparable test on anchoring and setting performance of resin bolts with different rod shapes

The anchorage performances,mixing uniformity of resin anchoring agent,setting torque and thrust of the current five kinds of resin anchoring bolts with different rod shapes in coal mine roadways were studied by laboratory tests.The results show that the pulling force of five kinds of bolts is more than 170 kN under the condition of 125 mm anchor length.The mixing effect is poor with finish rolling right-handed all-coarse-thread bolts,a large area of anchorage segment are empty or rod and resin anchoring agent separated.Left-handed no longitudinal fine rib bolts have the minimum setting torque,the setting torques of finish rolling right-handed all-coarse-thread bolts,left-handed low wide rib bolts,finish rolling right-handed all-fine-thread bolts,general left-handed no longitudinal rib bolts are respectively 1.75 times,1.85 times,2.7 times and 2.5 times of its.Finish rolling right-handed all-coarse-thread bolts and finish rolling right-handed all-fine-thread bolts need one or two workers to complete the installation in the case of full length anchorage.Left-handed low wide rib bolts needs two or three workers,and general left-handed no longitudinal rib bolts and left-handed no longitudinal fine rib bolts need three or four workers to complete the installation.Although left-handed low wide rib bolts is obviously better than general left-handed no longitudinal rib bolts on the anchorage and installation performance,but there are still spaces for optimization,especially in the areas of cross rib width and height.