Abstract：The current mining working area of Zhaogu No.2 Mine is under the gravel aquifer and the bedrock weathering zone aquifer in the lower part of the hidden outcrop loose layer of the coal seam. The overlying thick loose aquifer and thin bedrock have a significant impact on the mining face, which is directly related to the safety production work. The thickness of the roof bedrock and the overlying aquifer in the mining operation area were detected. The height of the ' two zones ' was predicted by using FLAC3D numerical simulation software. According to the ' three coal mining specifications ' and related papers, a reasonable calculation method was selected to calculate the height of the ' two zones '. The two results were highly consistent. According to the detection data, simulation and calculation, it was highly reasonable to demonstrate that the water-proof coal ( rock ) pillar and the thickness-limited mining measures were set to realize the full-height fully-mechanized mining at one time, which played an important guiding role in achieving high-yield, high-efficiency and safe production in Zhaogu No.2 Mine, and was of great significance to the development and utilization of coal resources.
韩久方. 薄基岩厚冲积层大采高工作面防砂防水煤岩柱留设实践[J]. 煤炭与化工, 2023, 46(9): 7-11，43..
Han Jiufang. Practice of leaving sand-proof and waterproof coal and rock pillars in large mining height face with thin bedrock and thick alluvium. CCI, 2023, 46(9): 7-11，43..
