CONTENTS
Advances in rock mechanics and engineering research in deep low-temperature environments Hot!
Investigations of the rock mass structure and disaster prediction model of slopes in the Fushun west open pit mine
Testing of fragments ejection characteristics and burst kinetic energy index for different types of coal and rock
Full-space collaborative support technology for reconstructing multi-bearing structures in crushed soft rock roadways under strong dynamic pressure
Rock control mechanism of gangue grouting and interval backfilling in post-mining space under aquifer in China?s western mining area
Experimental investigation on temperature control of surrounding rock-lining of tunnel in cold region based on phase change energy storage
Experimental investigation on the mechanical properties of sandstone with different numbers of fractures before and after grouting
Experimental investigation of the influencing factors on the mechanical properties of grouted fractured rock mass
Strain increment-based short-term prediction method for uniaxial compressive failure in red sandstone
Propagation and water inrush mechanisms of concealed karst fissures with consideration of mixed-mode I–II fracture toughness
Strain softening damage constitutive model and its verification for brittle rocks based on Logistic distribution
A tension-shear coupling beam plastic model of jointed rock bolts
Passive fully grouted bolts have been widely utilized in civil and mining engineering. However, existing anchorage theories inadequately capture the deformation characteristics and mechanical behaviors of bolts within jointed rock masses. To address this limitation, the tension-shear coupling beam model, which depicts the elastic responses of the bolts, was refined to accommodate the plastic stage, taking into account the geologic characteristics of fully grouted bolts under combined tension and shear loads, as well as the bending deformation effects during the plastic phase. By introducing the Logistic function to characterize the geometric shape of the bolt after yielding and integrating plastic bending theory, geometric constraints, and failure criteria, a method for calculating the internal forces and contributions of the bolts was developed. Comparisons between the proposed model, existing models, and shear test results were conducted, systematically analyzing the effects of bolting angle, bolt diameter, and joint friction angle on anchorage performance. The results indicate that, compared to existing models, the developed model more accurately predicts the test results, demonstrating an error reduction of approximately 8.16% to 14.68%, thus validating the model′s rationality. Additionally, an optimal bolting angle was identified, slightly larger than the joint friction angle. The bolt contribution exhibits a parabolic growth trend with respect to the bolt diameter. This research enhances the understanding of the anchorage mechanism for bolts undergoing plastic deformation and provides essential theoretical foundations for strength calculations and the optimized design of bolting in jointed rock masses.
Crack tip localization method based on Williams series and digital image correlation method
Evaluation method and classification standard of coal dynamic failure intensity based on damage-energy co-evolution#br#
Large-strain nonlinear consolidation of dredged sludge yards treated by prefabricated horizontal drains considering well resistance effect
Multi-peak attenuation effect of double tunnels in water-sealed storage cavern under variable amplitude impacts based on similar models
A non-orthogonal elastoplastic constitutive model for coarse-grained soils considering particle breakage#br#
Vertical seismic responses of floating hollow pipe piles in layered soils
Coupling mechanisms for the one-dimensional nonlinear thermal consolidation of saturated clay under thermal-mechanical loading with consideration of effective void ratio
Effect of the size and strain rate on the particle strength of rockfill materials#br#