Upward mining can effectively alleviate the tension of mine connection,and prolong the service life of mine.The study takes the typical upper thin and lower thick coal seam group mining as an example;and comprehensively uses theoretical analysis,numerical simulation and other research methods to study the feasibility of upward mining of B5 coal seam.The results show that the B42 coal seam and the B5 coal seam interlayer rock layer are of single coal seam structures.The B5 coal seam is within the fracture zone formed after the mining of the B42 coal seam.After the mining of the B42 coal seam,the overlying rock layer forms a hinged rock beam structure.With the working face mining,the hinged rock beam structure continues to pass forward,and the B5 coal seam can maintain good integrity and continuity.4 discriminant methods are used to check whether the B5 coal seam in the first level and first mining area of the mine has the feasibility of upward mining.It is clear that some sections of the B5 coal seam have the feasibility of upward mining,which provides a theoretical basis for its efficient mining.
关键词
上薄下厚煤层群/数值模拟/铰接岩梁
Key words
Upper thin and lower thick coal seam group/Numerical simulation/Articulated rock beams
维普
万方数据