- Patent Title: Method for removing hydraulic support for solid filling coal mining
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Application No.: US15319292Application Date: 2015-05-13
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Publication No.: US10036252B2Publication Date: 2018-07-31
- Inventor: Feng Ju , Xiexing Miao , Jixiong Zhang , Xuejie Deng , Xufeng Wang
- Applicant: China University of Mining and Technology
- Applicant Address: CN Xuzhou
- Assignee: China University of Mining and Technology
- Current Assignee: China University of Mining and Technology
- Current Assignee Address: CN Xuzhou
- Agency: Greenberg Traurig, LLP
- Priority: CN201410291182 20140625
- International Application: PCT/CN2015/078837 WO 20150513
- International Announcement: WO2015/196872 WO 20151230
- Main IPC: E21D23/04
- IPC: E21D23/04 ; E21D15/60 ; E21D23/00 ; E21F15/02 ; E21F15/06 ; E21F13/00 ; E21F15/08

Abstract:
A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a n-type steel beam before each hydraulic support is removed. A supporting roof is reinforced in time by means of erecting a crib (13) and grouting after each hydraulic support is removed, three grouting pipelines (12) are laid after the supports of the whole work surface are removed, and grouting is carried out in the whole finishing cut space. The roof of the support removing space of the work surface is stable so that the hydraulic supports on the work surface of solid filling coal mining are ensured to be safely and efficiently removed.
Public/Granted literature
- US20170138194A1 METHOD FOR REMOVING HYDRAULIC SUPPORT FOR SOLID FILLING COAL MINING Public/Granted day:2017-05-18
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