Discussion on Layout and Support Technology of Extremely Close Range Coal Seam Mining Tunnels
The interlayer distance between NO.4-1 coal seam and NO.4-2 coal seam of Shenghouyuan Coal Industry is 0 to 4.62 meters,with an average of 2.16 meters,which belongs to the extremely close range coal seam.Therefore,it is particularly important to arrange the tunnels and support methods for NO.4-2 coal seam under the goaf of NO.4-1 coal seam.For this purpose,NO.4-2 coal seam was taken as the research object.Through on-site experiments,theoretical analysis,numerical simulation and other means,the layout position of NO.4-2 coal seam roadway was analyzed and studied.Based on the determined layout form of the roadway,corresponding support designs were formulated to achieve stability control of the surrounding rock of NO.4-2 coal seam roadway and ensure safe production;At the same time,it has improved the level of excavation progress,alleviated the tense situation of mining replacement,and created good economic benefits.
NETL
NSTL
万方数据
