Determining the rational layout parameters of the lateral high drainage roadway serving for two adjacent working faces

摘要: Abstract To determine the rational layout parameters of lateral high drainage roadway (LHDR) serving for two adjacent working faces, a mechanical model LHDR under mining influence was established, and overburden fissure, mining-induced stress distribution rules were analyzed. First, development characteristics fissure law upper section face Second, by analyzing vertical at different layers, distance determined as 25 m. Third, surrounding rock deformation effect, law, heights 20, 25, 30 m away from roof, horizon to be Finally, an example located 25 m above roof No. 2 coal seam 2-603 presented. Results show that when coalface is being mined, rocks lag 80 m or even further tends stable. The relative deformations floor both its walls 583 450 mm, respectively. reduction rate 21.52%–25.32%. sufficient extract pressure relief gas in 2-605 face. average concentration pure volume branch pipeline 24.8% 22.3 m 3 /min, respectively, showing position high-level boreholes reasonable.