Abstract: Thin bedrock roof plate is thin,the roadway is not easy to form a stable structure,which is easy to cause localized
roofing accidents. This paper explores the deformation mechanism of the roadway in the coal seam with a thick loose layer
and thin-bedded rock,focusing on solving the stability problem of the surrounding rock under the interaction of multiple factors.
Taking the thin bedrock roadway of 16081 of Zhaogu No. 1 Mine as the background,and targeting at the deformation of the
thin bedrock roadway,we combined the response surface method with numerical simulation of FLAC3D to study the multi-factors
coupling effect,and analyzed the interaction mechanism between the bedrock thickness,the thickness of bedrock bottom stratification,
and the width of the roadway section. The results show that:① the dominant factor of total deformation of the roadway is
bedrock thickness>section width>bottom layering thickness,and the main controlling factor of the volume of the plastic zone is
section width>bottom layering thickness>basement thickness. ② the effect of bedrock thickness on the total deformation is enhanced
with the increase of the thickness of the bedrock bottom layering and the section width,the interaction between the
thickness of the bedrock bottom layering and section width is insignificant. ③ the effect of bedrock thickness on the volume of
the plastic zone is increased with the increase of the bottom layering thickness. The effect of bedrock thickness on the volume of
the plastic zone is enhanced with the increase of bottom layering thickness,and the interaction effects of bedrock thickness and
bottom layering thickness of bedrock,section width and bottom layering thickness of bedrock on the volume of the plastic zone
of the roadway are not significant. Combined with the above analysis,five kinds of support schemes were designed,the optimal
plan was selected and the deformation of the mine surrounding rock was measured on site,and the on-site monitoring showed
that the top and bottom plates moved closer by 80 mm and the two gangs moved closer by 140 mm within 90 days,and the over
all deformation of the roadway was well controlled.