E xperimental Research on Safety Mining Sp eed of Aqu ifer-pr otective Mining Workin g Face in Sh allow Coal Seam at the Upper Limit Area
ZHANG Hong-zhong
Abstract：Based on the domestic and foreign research conclusion and based on the 6 coal seam as the research object, thought of "working face advances speed depending on the overlying strata water seepage velocity "is proposed by analyzing the mechanism and key of aquifer -protective mining in shallow coal seam ( working face advances speed can make broken key strata body closing before upper water seepage to mined -out area ).According to the seepage theory and empirical formulas and the measured data etc., seepage time formulas and calculation of ground water in upper strata of working face is made for every classification of aquifer -pro-tective mining.According to the key strata theory and geological data of Wanbei mine area , first or periodic breaking space of overlying strata is calculated for each class.Thus, each classification working face advances speed is calculated and identified.Meanwhile , the safety aquifer-protective mining face length range is de-termined by lower limit promote speed of working face and cutting speed of coal winning machine.The aquifer-protective mining technology system is perfected furthermore , and theoretical guidance is provided for secur-ity applications of shallow seam aquifer -protective mining technology.
Keywords：seepagemining speedshallow areathe upper mining limitaquifer-protective
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：6( 34-39 )