Numerical Simulation Analysis of Surrounding Rock Deformation of Expansive Rock Roadway under Humidity Field

Abstract

Based on the measured distribution law of humidity field, according to the humidity stress field theory, the coupling of the humidity field and the ground stress field is realized, and the humidity field is systematically analyzed. Under the conditions, the influence of the expansion of surrounding rock, lining, buried depth, height-span ratio and horizontal pressure coefficient on the deformation of the surrounding rock of the roadway, the general law of the surrounding rock deformation of the swelling rock roadway is obtained. The results show that the five factors have a certain impact on the approaching amount of the two sides of the surrounding rock and the approaching amount of the roof and floor of the swelling rock roadway, but the degree of influence is different. The order of factors affecting the approach of two sides is lining > expansibility > buried depth > horizontal pressure coefficient > height-span ratio; The order of factors affecting the approach of roof and floor is lining > expansibility > height-span ratio > horizontal pressure coefficient > buried depth. The research results provide valuable suggestions and references for the selection of reasonable support schemes and related design and construction of swelling rock roadways.

The Mechanical Properties of Gangue Paste Material for Deep Mines: An Experimental and Model Study

“…Through uniaxial compression and triaxial tests, the characteristic information of backfill before loading failure is studied, and four stages of deformation and failure of the stress-strain curve are proposed. The internal relationship of energy dissipation, confining pressure, and stress-strain under different confining pressure loading conditions, as well as crack propagation, macro failure, and fracture surface distribution were analyzed [ 17 , 18 , 19 , 20 , 21 ]. Through response surface analysis, Ensemble Learner Algorithms, or BP neural network, the strength of paste filling material can be obtained by using the mixture ratio of paste filling material [ 15 , 18 , 22 , 23 , 24 ].…”