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Keyword [hard coal]
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21. Failure Mechanism Of Hard Thick Coal Under Various Types Of Disturbance At The Front Of Mining Face
22. Study On Weakening Mechanism And Engineering Application Of Deep-Hole Blasting In Hard Coal Seam In Fully Mechanized Top Coal Caving Mining
23. Mechanism And Application Of High Pressure Gas Presplitting Detonation On Coal Rock Fracturing
24. Basic Study On The Layer-crack Structure Instability Of Deep Roadway Surrounding Rock And Energy Release
25. Relationship Of Structural Coupling Between Hydraulic Roof Supports And Surrounding Rock In Extra-thick And Hard Coal Seam With Super-large Mining Height And Longwall Top Coal Caving Method
26. Study On Roof Control Of 6m Large Mining Height Longwall Face In Shallow Buried Hard Roof And Hard Thick Coal Seam Face
27. The Characteristics Of Gas Adsorption/Desorption From 21 Coal And Its Influence On Gas Extraction In Guhanshan Coal Mine
28. Seperation And Analysis Of Soluble Organic Matters In Soft Coal And Hard Coal From Cheji Coal Mine
29. Study On The Impact Mechanism And Prevention Technology Of Mining With Layered Caving In Extra Thick And Hard Coal Seam
30. Study On Gas Adsorption And Diffusion Of Soft And Hard Coal Based On Molecular Simulation
31. Research On Monitoring And Recognition Of Electromagnetic Radiation In Abnormal Area In Front Of Hard Coal Driving Face
32. Mechanism And Application Of Pressure Relief And Permeability Enhancement High Pressure Water Jet Drilled In Soft-hard Coal Seams
33. Study On The Performance Of Multi-point Impact Cutting Drum
34. Experimental Study On Energy Consumption And Fracture Characteristics Of Hard Coal Under Impact
35. Research On Optimization Of Coal Pillars In Section Of Fully Mechanized Mining Face In Near Shallow Buried Thick Bedrock "Three Hard" Coal Seams
36. Mechanism Of Pre-Splitting Blasting To Increase Lump Coal Rate In Hard Coal Fully Mechanized Mining Face
37. Design Of Coal Breaking Experimental System Combined With High Pressure Water Presplitting And Picks And Research On Crushing Performance
38. Research And Application Of Top Coal Pre-cracking Technology In Fully Mechanized Top Coal Caving Mining And Hard Coal Seam
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