Development and application of a novel physical simulation test system for deep coal burst roadway with dynamic-static combined loading
LU Zhiguo
GAO Fuqiang
YANG Lei
LI Pengjie
LOU Jinfu
LI Zhongwei
FU Yukai
WANG Xiaoqing
Abstract：Deep mine roadways are susceptible to rockbursts due to high in-situ stresses and dy-namic disturbances from mining activities.To investigate the triggering mechanisms of rock-bursts undercoupled static-dynamic loads,a specialized physical simulation test system was developed.A unique gypsum-based model material,characterized by low strength,high brit-tleness,and excellent moldability,was formulated.This material was designed to accurately replicate the violent ejection of rock fragments characteristic of failures in deep roadways under combined static and dynamic loads.Comprising a main structural frame,a static loading de-vice,and a dynamic loading device,the system can simulate the complex stress conditions of"high static stress+dynamic disturbance"found in deep mining environments.The design ensures the stable application of static stress while preventing interference between the static and dynamic loading systems.Uniaxial compression tests on standard specimens revealed that the material has a uniaxial compressive strength of approximately 6.54 MPa and fails with a vi-olent ejection of fragments.This behavior confirms the material's strong bursting liability,making it suitable for physical modeling requirements.To enhance the fidelity of the simula-tion and bridge the gap between laboratory procedures and in-situ mining conditions,similarity principles were applied to the physical model's construction,scaling its dimensions,stress en-vironment,support materials,and other key parameters.Furthermore,a standardized work-flow and implementation protocol were established for conducting roadway rockburst simula-tions.Validation tests,using a case study of a kilometer-deep,fully-mechanized longwall top-coal caving roadway,were conducted.These tests analyzed the dynamic response characteris-tics of the surrounding rock mass and support structures under various cyclic impacts and sup-port conditions.The results confirmed the reliability of the test system,the model material,and the established methodology.This physical simulation platform effectively reproduces the complex static stress environment of deep roadways while allowing for the application of con-trolled dynamic disturbances.The platform is a valuable tool for investigating the deformation and failure mechanisms of rock masses under multi-field coupling,the triggering mechanisms of rockbursts from static-dynamic interactions,and for evaluating the efficacy of rockburst pre-vention technologies.
Keywords：roadwayrock burstcoupled static-dynamic loadsphysical modellingmodel ma-terials
Publication Date：2025-09-30
Online Publishing Date：2025-10-31(First online date of this platform, not the publication date of the document)
Pages：12( 959-970 )