Test result shows that it can improve the bracing ability w ith less material.The shell bolting and shotcrete support is rationally structur ed and can be easily constructed.Lab test is com...

• 该结构具有一定的整体可缩性,能承受强大变形地压及采动荷载,达到用较少材料提高喷层支撑能力与让压的目标。