中国矿山工程

There are problems with insufficient support strength and unstable surrounding rock in the transportation roadway of the 15210 working face in a mine in northwest China. To address the issues with roadway support, high-strength prestressed anchoring technology is adopted for treatment. Numerical simulation was used to study and analyze the strain of surrounding rock after the implementation of ordinary anchor rod and high-strength prestressed anchor rod support technology. The research results showed that the high-strength prestressed anchor rod support technology can control the strain of surrounding rock within 60mm, and the support effect is good. To ensure the safety and reliability of the roadway support structure, a combination of anchor rod and anchor cable support and U-shaped steel reinforcement support are proposed. After the support is completed, the displacement of the roof and two sides in the support area is investigated. The investigation results show that the maximum displacement of the roof after 120 days is 126mm, and the overall stability of the roadway.