COAL ENGINEERING ›› 2015, Vol. 47 ›› Issue (4): 50-53.doi: 10.11799/ce201504017

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The Feasibility Study of Fast Lofting by Principle of Drawing Ellipse at Three Heart Arch Roadway Construction

  

  • Received:2014-07-12 Revised:2014-09-06 Online:2015-04-10 Published:2015-04-10

Abstract: In order to study method of speedy lofting and measurement at three heart arch roadway, It is possible using method of drawing ellipse for fast lofting and measurement through the analysis the error of ellipse arc arch and three heart roadway.It is solve the problem of measuring of fast lofting and examinating quality of construction at three heart roadway in coal mining. It is positive significance for promote fast lofting and measurement of three heart arch roadway at the tunneling working surface. Key words :three heart arch;ellipse arc arch;fast lofting;measurement;roadway.

Key words: three heart arch, ellipse arc arch, fast lofting, measurement, roadway

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