The present invention discloses a method for fast grading underground
engineering surrounding rock in real
time based on parameters while drilling. According to the method, a on-site drilling test is implemented; uniaxial
compressive strength along the drilling
depth direction of a tunnel face and a rock
mass integrity index are obtained based on parameters while drilling measured in a drilling process; a relational expression of the parameters while drilling, the uniaxial
compressive strength and the rock
mass integrity index is built; in actual underground
engineering, the obtained parameters while drilling are introduced into the above relational expression; and surrounding rock in front of the tunnel face is graded fast in real time according to a surrounding rock basic quality (BQ) index grading calculation formula. With the method for fast grading the underground
engineering surrounding rock in real
time based on the parameters while drilling provided by the invention, it only need to utilize a drilling
machine in an engineering field to carry out a drilling test on the surrounding rock, and
coring and an
laboratory testing are not required, and the surrounding rock can be graded fast in real time, and grading efficiency is high; and the grade of the surrounding rock can be determined just based on the drilling parameters, and various kinds of testing
modes in a traditional grading method are not required. The method of the invention has the advantages of simplicity and operational easiness.