关键词: 邻近层工作面, 同采, 动压巷道, 错距

Abstract: Aiming at the large deformation problems of roadway in nearby-layer simultaneous working faces, the paper has studied different staggered distances along strike and tendency in nearby-layer simultaneous working faces by means of theoretical analysis, numerical simulation and field measurement. The results have shown that：1) Owing to the impact of multiple mining during the progress of simultaneous mining, strata between the upper and lower working faces have experienced the continuous-quasi continuous-discontinuous-dispersion process. 2) Under the different strike staggered distances, the peak of abutment pressure, the scope and degree of failure rock have changed in descending order from staggered distance of 20 m, 0 m, 50 m to 60 m. 3) Affected by multiple mining, the displacement of haulage roadway in the lower face has shown stepped increase with the approach of working face, and twice experienced the process of gradually increasing-obviously increasing and being stable. Multiple mining effects which have been produced by simultaneous mining should be taken into considera- tion in the mining area design, and reasonable strike staggered distance and tendency staggered distance should be designed and optimized to improve the mechanics state of the stope rock, especially surrounding rock of roadway.

Key words: nearby-layer working face, simultaneous mining, dynamic pressure roadway, staggered distance