Patents
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- Qingquan Liu , Jingjing Liu,Biao Lv,Haoxue An,Yuanping Cheng,Peng Chu,Yanfei Lu,Coal seam gas parameter detection device and construction method based on dead space pressure conversion
- Qingquan Liu , Yanfei Lu,Peng Chu,Yuanping Cheng,Congmeng Hao,Deyang Wang,A invention relates to a device and method for measuring the shape of the hydraulic flushing hole in a coal seam
- Qingquan Liu , Peng Chu,Yanfei Lu,Yuanping Cheng,Yuanyuan Liu,Lei Xia,Siwen Zheng,A quantitative evaluation method for permeability enhancement effect of hydraulic flushing with cross-measure boreholes
- Biao Lv , Qingquan Liu,Xiaohang Ma,Haoxue An,Feiyang Yu,Hang Miao,Gas content measuring device used in an underground coal mine