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Keyword [drainage radius]
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1. Integrated Of Key Parameters Of Low Permeability Coal Seam Gas Drainage Drilling Through Layers Of Hebi 4Th Mine
2. Study On The Cross-measure Cutting Coal Technology Of Gradual And Rapid Model In Outburst Coal Seam Of Huale Mine
3. The Technology Research Of Gas Pre-drainage Through Floor Cross-measure Boreholes Of6Coal Seam In Zhangji Coal Mine
4. Research On Secondary Sealing Technology With Pressure And Drainage Optimization Of Changping Mine
5. The Technology Research Of Gas Pre-drainage Through Cut Hole Drilling In Li Zuizi Coal Mine
6. Study On Gas Drainage By Combining Surface Well Drilling Fracturing With Underground Horizontal Drilling
7. Guizhou Songhe Coal Mine Borehole Parameter Optimization Research
8. The Technology Research Of Gas Pre-drainage Through Floor Cross-measure Boreholes Of11-2Coal Seam In Zhangji Coal Mine
9. Research On The Key Technology Of Regional Outburst Prevention Of Steeply Lower Protective Layer With Gob-side Entry Retaining
10. The Research On Gas Extraction By Drilling Borehole In Coal Seam Of Low Permeability
11. Stress Variation Characteristics Of Cross-Seam Borehole And Its Effect On Gas Drainage
12. The Aging Research On Characteristics Of Gas Drainage Radius In Bedding Drilling On Wulunshan Coal Mine
13. Research On The Relationship Between The Parameters Of The Current Seam Borehole And The Effect Of Gas Drainage
14. Simulation Of Seepage Laws Of Gas Drainage From Drill Hole Along Coal Seam Based On Adsorption Effect
15. Study On Gas Drainage Radius Of 11-2 Coal Drilling In Pan Mine
16. Research On Gas Pre-drainage Test By Boreholes In 6-2 Seam In Gubei Mine
17. Research On Determination Method Of Effective Radius Of Coal Seam Gas Drilling Drainage
18. Study On The Drainage Radius And Productivity Calculation Of Tight And Condensate Gas Reservoir
19. Research On The Technology Of Gas Outburst In The Bottom Roadway Of The South Third Mining Area Of ??Shaqu No.2 Mine
20. The Research On The Effect Of Guiqing Coal Mine Hydraulic Hole And Coal Unloading Quantity On Improving Permeability
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