Typical application examples and improvement research of hydraulic powered support applied to fully-mechanized longwall coal mining face in steep dipping seam

Yun Dongfeng; Gu Bin; Wu Yongping; Lei Qi; Liu Zhu; Zhang Yuanhao

doi:10.13199/j.cnki.cst.2017.01.010

Abstract：With the analysis on the development obtained from the fully-mechanized mining technology along the strike of the steep inclined seam in China,in combination with the typical cases of the fully-mechanized coal mining in the steep dipping medium thick seam,the fully-mechanized longwall top coal mining in the steep dipping ultra thick seam and the fully-mechanized 4.5 m high cutting mining engineering practices in the steep dipping thick seam,the paper expounded the application effect and the sustainable improvements of the hydraulic powered support applied to the fully-mechanized coal mining in the steep dipping seam.The paper concluded and summarized the several major problems to be solved directly affected to the application effect of the hydraulic powered support applied to the mechanized coal mining in the steep dipping seam.The major problems were including the hydraulic powered support too heavy,poor telescopic side guard plate,the floor adjusted jack hard to be replaced at the site,the hydraulic powered support hard to be pushed forward with the pressure on the roof and others.The paper proposed the sustained development of the steep dipping hydraulic powered support should be mainly based on the conception of " the temperate working resistance,reliable anti lodging and sliding and lightening powered support weight".Those major problems were innovationally solved with the traditional concept breaking in the improvements.The preparation and consideration were conducted on the related deep level problems of the sustained improvements for the hydraulic powered support applied to the mechanized coal mining in the steep dipping seam in order to have wide attention and to coordinatively promote the standardized development of the hydraulic powered support applied to the mechanized coal mining in the steep dipping seam.