Abstract: To start with, the roadside support action rules has been analyzed, and the roadside barrier support resistance and rational compressed volume formula have been given. A new technology about gob side entry retaining by using concrete filled steel tube column is put forward. And in order to verify reliability of this technology, the concrete filled steel tube column bearing capacity experiment has been done. Then, on the basis of experiment, the calculation theory and the method of ensuring related parameters have been given and instance analysis of selection of tubular column has been conducted. Finally, this technology has been applied to the engineering practice, which draws the conclusion that this new technology is suitable for gob side entry retaining due to its cheaper cost and higher bearing capacity.

Key words: roadside supporting parameters, concrete filled steel tubular column, bearing capacity test, gob-side entry