Study on Roof Control Technology for Withdrawal Passageway in Fully Mechanized Coal Face with Large Mining Height
YANG Huibin
WANG Zhigang
ZHAO Yinhu
SONG Xiaochao
Abstract：To counter to the present status of roof control in the fully mechanized coal face with large mining height in the unmined stage in Sanjiaohe Mine of Huozhou Coal Electricity Group Co. , Ltd. , the overburden rock space in the unmined district was divided into three cases of the rupture behind the mining-stop line, the rupture above coal wall and the rupture above the withdrawal passageway according to the occurrence of periodic weighting in this stage and the different roof rupture positions. On this basis, a mechanical model of the immediate roof of the passageway under a given deformation condition was established, the immediate roof convergence of the passageway was calculated by using the energy principle and variational method, and the calculated results agreed well with the measured data. This research result has a certain theoretical guiding significance for the roof control of the withdrawal passageway in the fully mechanized coal face with large mining height.
Keywords：coal face with large mining heightwithdrawal passagewayoverburden rock structureroof convergence
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 59-61,68 )