Up to now, roof rock and floor rock have been considered as important factors for selecting proper mining technologies and equipment. Moreover, the roof rock physio-mechanical properties have been seen as the bases for selecting the ground pressure control methods. In the paper, the authors represent the research results on the determination of the rock physio-mechanical properties and the evaluation of the rock mass quality of the roof rock at coal seam N°10, level +30 - +115 of Trang Khe. area, Hong Thai Coal Company.