关键词: 超长工作面, 矿压显现规律, 工作阻力分布, 地表移动变形

Abstract: Based on the first super-long intelligent mining face with an annual output of 10 million tons of 450 m in China, the strata behavior and surface movement and deformation law are comprehensively analyzed by means of actual measurement. The results show that the average first weighting step of 450 m super-long working face is 77.1 m, and the periodic weighting step is mainly distributed in 5 ~ 15 m, with an average of 11.4 m. The periodic weighting step of super long working face is small, the weighting is frequent, the duration is short, and the weighting along the inclination of the working face is not synchronous; During the weighting period, the working resistance of the support forms two high resistance areas on both sides of the middle of the working face, showing a "saddle" shaped bimodal distribution along the inclination of the working face. The working resistance of support in 450m longwall face is mainly distributed in the medium resistance range of 8000 ~ 14000kN, showing normal distribution characteristics and good adaptability of support. Under the influence of strong mining in the super long working face, the surface subsidence has the characteristics of large influence range and fast subsidence speed, and the surface movement range and subsidence amplitude at the goaf side of the working face are significantly greater than those at the solid coal side, so the surface presents an asymmetric subsidence phenomenon. The research results can provide reference for roof management and mining design of similar super long working faces in China.