Study on Safety Withdrawing Technology of Hydraulic Powered Supports from Fully Mechanized Coal Mining Face
Abstract：In order to solve the low efficiency, poor safety and other problems existed in the hydraulic powered supports withdrawing from the fully mechanized coal mining face, from the safety withdrawing technology of the hydraulic powered supports and the equipment matc- hing technique, the withdrawing technology with a single channel in single wing and withdrawing technology with multi channels of auxilia- ry gateway were studied and optimized and were in comparison with the conventional face equipment removing technology. A layout mode of ZZ7200/18/36 mode delta area shield support was applied to the above two powered support withdrawing technologies and thus the safe- ty withdrawing space could be safely and effectively controlled. With application of the WC40Y series powered support removing truck and the WC25EJ series removing truck and other auxiliary transportation equipment, the withdrawing time of the hydraulic powered support could be reduced individually about 27 days and 35 days and the working hour could be reduced about 60% and 85%. Meanwhile the withdrawing technology with a single channel of single wing with a low requirement of gateway driving quantity and a low requirement of the gas content would have a higher suitability than the withdrawing technology with multi channels of the auxiliary gateway.
Keywords：hydraulic powered supportsingle channel of single wingmulti channels of the auxiliary gatewaywithdrawing technologyspecial shield supportauxiliary transportation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 14-17 )