Supporting Technique of Broken Expand Rock Roadway Under High Stress

Taking Caocun Coal Mine in Huozhou Mining Area as engineering background, a test of high strength and high pre-stress yielding anchor bolts is conducted, and a better supporting effect is obtained. The conclusion is that the "high resistance-yielding support" is reasonable, and high strength-high pre-stress and yielding bolts are suitable for tunnels of broken expand rock roadway under high stress.