The Mechanism Movement Design of Caving Tool in CBM

Abstract:

Caving technology means to dig a big stable cave in CBM after drilling a hole in order to eliminate coal bed pollution, link well holes most with the coal bed and keep medium in reserve. Caving technology can raise the collection efficiency of coal seam gas. The water jet-mechanical caving tool in CBM designed in this paper can make high pressure mud open knife shafts, make high pressure mud flow through spray head to drill the coal bed and make bit mechanically drill as well. The general design of caving tools structure is provided in this paper. Movement design of knife shafts which are the basic components in caving tool and optimal internal diameter of hydraulic cylinder bottom are given in this paper as well. The work can lay a foundation of latter detailed design of caving tools structure.

• Periodical: Advanced Materials Research (Volume 933)
• Pages: 255-259
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.933.255
• Online since: May 2014
• Authors: Jun Yan Zou*, Jun You Zhao
• Keywords: Caving Technology in CBM, Mechanical Caving, Mechanism Movement Design, Water Jet Drill

References

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