|
|
|
| Practice of leaving sand-proof and waterproof coal and rock pillars in large mining height face with thin bedrock and thick alluvium |
| Han Jiufang |
| Henan Energy and Chemical Industry Group, Xinxiang 453600, China |
|
|
|
|
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.
|
|
|
|
|
|
| [ 1 ] 杨达明，郭文兵，赵高博，等. 厚松散层软弱覆岩下综放开采导水裂隙带发育高度[ J ]. 煤炭学报，2019，44（ 11 ）：3 308 - 3 316.
[ 2 ] 杨 洋. 对淮南巨厚松散层含水层下提高回采上限的探讨[ J ]. 江西煤炭科技，2019（ 4 ）：43 - 46.
[ 3 ] 张安斌，赵 健，张 鹏，等. 巨厚松散层下导水裂隙带高
度预测试验探究[ J ]. 中国煤炭，2016，42（ 3 ）：28 - 33.
[ 4 ] 张永刚，李运江，刘延欣，等. 厚松散层薄基岩下煤柱留设
类型转变研究[ J ]. 煤炭技术，2017，36（ 5 ）：63 - 65.
[ 5 ] 张永刚，刘延欣，武宇亮. 厚松散层薄基岩下重复采动覆岩
破坏高度综合研究[ J ]. 煤炭技术，2017，36（ 8 ）：72 - 75.
[ 6 ] 李江华. 水压作用下防砂安全煤（岩）柱失稳突水溃砂机理研究[ D ]. 徐州：中国矿业大学（北京），2016.
[ 7 ] 李全生，徐祝贺，张 勇，等. 基于Hoek-Brown准则的薄基岩厚松散层覆岩变形破坏特征研究[ J ]. 矿业科学学报，2019，4（ 5 ）：417 - 424.
[ 8 ] 钱鸣高，石平五，许家林. 矿山压力与岩层控制[ M ]. 徐州：中国矿业大学出版社，2010. |
| [1] |
Cheng Lichao1,2,3, Lu Bin1, Li Xinwang1,2,3, Hao Yunde1, Long Hang1, Wang Haixuan1. Study on slurry diffusion law in goaf under different grouting pressure[J]. CCI, 2023, 46(9): 1-6. |
|
|
|
|
