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在井筒、峒室和巷道的支护中,常用钻机在所要支护的围岩表面钻有一定深度的孔,把一种用金属或其它高抗拉性能材料制作的杆状构件安设其中,用以改善围岩应力状态,提高围岩稳定性。工程中把这种锚固在岩体内部的杆状构件称为锚杆。 目前,煤矿中有数十种类型的锚杆用于围岩的临时支护或永久支护。与其它支护材料和类型相比,
In the wellbore, 峒 chamber and roadway support, the commonly used drilling rig in the rock wall to be supported by drilling a certain depth of the hole, the use of a metal or other high tensile properties of rod-shaped components made of materials installed therein, To improve the surrounding rock stress state, improve the stability of surrounding rock. The project anchored in the rock inside the rod-shaped member called the anchor. Currently, there are dozens of types of rock bolts used in the temporary support or permanent support of the surrounding rock. Compared with other support materials and types,