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破碎围岩巷道是煤矿安全生产的重大隐患之一,而注浆是破碎巷道加固的主要手段,注浆工艺的适应性对于煤矿安全生产具有重要意义。针对实验巷道极破碎围岩锚杆(索)孔成孔困难、锚固效果差等问题,采取不同的注浆工艺对巷道破碎围岩进行分区加固,并对注浆后围岩变形进行观测。观测结果表明:XV1101巷注浆加固完成后,巷道两帮变形和顶底板的移近量均比较小,两帮移近量最大72 mm,底鼓量最大为166 mm;XV1102巷注浆加固完成后,两帮移近量最大55 mm,底鼓量最大为46 mm,变形量更小。实验所提出新型注浆加固工艺对破碎巷道的加固效果较好,新的注浆工艺和注浆锚杆(索)有效地控制了巷道变形。
Crushing surrounding rock roadway is one of the major hidden dangers of coal mine safety production, and grouting is the main means of reinforcement of crushed roadway. The adaptability of grouting technology is of great significance to coal mine safety production. Aiming at the problems such as the difficulty of forming holes and the poor anchoring effect of bolt holes in the extremely broken surrounding rock of tunnel, different grouting techniques were used to reinforce the surrounding rock of the roadway and the deformation of surrounding rock after grouting was observed. The observation results show that after the grouting of XV1101 laneway is completed, the deformation of the two roadways and the displacement of roof and floor are relatively small. The maximum displacement of the two approaches is 72 mm and the maximum of the bottom drum is 166 mm. The grouting reinforcement of XV1102 lane is completed After the two sides moved nearly the maximum amount of 55 mm, the maximum amount of bottom drum 46 mm, the deformation is smaller. Experimental results show that the new grouting reinforcement technology has a good effect on the reinforcement of broken tunnels. The new grouting process and grouting bolt (cable) effectively control the deformation of roadway.