关键词: 回撤通道, 支护技术, 数值模拟, 综采工作面, 现场试验

Abstract: Based on 15101 working face retracements original channel support scheme the Ling Zhida coal mining in Shanxi province, numerical simulation was used, researching Stress deformation characteristics of roadway, According to the results of numerical simulation analysis, the row spacing between bolt and anchor cable is too small, and the roadway support strength to meet the safety retracement requirements, leading to face retracetment lag and the long cycle of retreat. To solve this problem, this paper analyzes the retracement roadway support strength characteristics, the optimization scheme is put forward, the numerical simulation method to select the optimal scheme for retracement roadway support, and field measurement. Results show that the scheme satisfies the security requirements of supporting retracement, reduces the material consumption, shortening the period of the working face retracement. For the class retreat channel support has a certain reference and guidance significance.