METHOD FOR REMOVING HYDRAULIC SUPPORT FOR SOLID FILLING COAL MINING

WIPO Patent Application WO/2015/196872

A1

Disclosed is a method for removing a hydraulic support for solid filling coal mining. Firstly, a support removing channel (3) is dug in a coal body (2) in front of the hydraulic support (1), and a support removing track (4) is laid, then the hydraulic support is removed from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a π-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. According to the method, in the process of removing the hydraulic support (1) for solid filling coal mining, 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, and meanwhile, it is guaranteed that the moving of overlying strata on the finishing cut and earth surface subsidence are effectively controlled.

JU FENG (CN)
MIAO XIEXING (CN)
ZHANG JIXIONG (CN)
DENG XUEJIE (CN)
WANG XUFENG (CN)

PCT/CN2015/078837

December 30, 2015

May 13, 2015

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JU FENG (CN)

E21D15/60

CN104131829A	2014-11-05
CN102900444A	2013-01-30
CN101975072A	2011-02-16
CN102312676A	2012-01-11
CN102094675A	2011-06-15
CN102086769A	2011-06-08
DE3236214C1	1983-09-29

JW IP LAW FIRM (CN)
北京德崇智捷知识产权代理有限公司 (CN)

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