天悦煤矿近距离煤层联采合理错距分析

Analysis of Reasonable Alternate Distance of Close Distance Coal Seams Combined Mining in Tianyue Coal Mine

近距离煤层上下联采的安全高效生产,关键在于合理确定下层煤工作面与上层煤工作面间的距离。通过分析天悦煤矿上层煤采动后的覆岩结构及应力分布规律,研究上层煤采动后的减压区范围及稳压区范围,探讨下层煤工作面布置于减压区和稳压区的合理性,得出该矿下层煤滞后上层煤工作面的合理错距为29.3～36.9 m.

The key of safety and high effective production of close distance coal seams combined mining is to reasonably determine the distance between the lower and upper coal working face. Strata structure and stress distribution law after upper coal seam mining in Tianyue coal mine is analyzed. The range of reduced pressure zone and stable pressure zone after upper coal seam mining is studied. The reasonability of lower coal working face layout at reduced pressure zone and stable pressure zone is discussed. The results show that the reasonable alternate distance of lower coal seam lags behind the upper coal seam is 29. 3 m to 36. 9 m.