China Coal Research Institute (China)

Enhancing the interfacial transition zone of coal gangue aggregate mortar through the synergistic effect of red mud substitution and CO₂ mineralization during mixing

To improve the weak interfacial transition zone (ITZ) associated with coal gangue (CG) aggregates while promoting industrial solid waste valorization and carbon reduction, a synergistic modification strategy combining red mud (RM) substitution (8–24%) and in-situ CO₂ mineralizati...

Mechanism of coalburst triggered by thrust fault slipping based on field monitoring, indoor experiments and numerical simulation

Abstract Coalburst disasters induced by thrust fault slip frequently take place in underground coal mines and often lead to severe roadway damage and personnel casualties. However, the triggering mechanism of coalburst remains unclear. Combined with field monitoring, physical ana...

Combined Protection Technology in Deep High In Situ Stress Environment of Metal Mines

Deep mining operations in metal mines face escalating challenges from high in situ stress environments, where conventional single-method ground control approaches often prove insufficient. This study proposes an innovative combined protection technology integrating four synergist...

Shaking Table Test on Liquefaction of Sandy Soil Site and Sensitivity Analysis of Liquefaction Influencing Factors

Earthquake-induced soil liquefaction poses a severe threat to the structural safety of underground infrastructure. This paper presents a shaking table model test conducted on sand sites, where two site models—namely, uniform saturated sand and layered dry–saturated sand—are desig...

Study on Fracture Propagation Behavior of Composite Directional Fracturing with Prefabricated Crack and Control Holes in Coal Seams

In order to achieve the goal of changing the direction of cracks and actively relieving pressure to increase permeability in local areas, and to prevent excessive stress concentration and areas with poor anti reflection effect in coal seams, this paper proposes a method of coordi...

Prediction of Waterjet Cutting Depth Under Multi-Field Coupling Based on Zero-Shot Learning

Sudden collapse accidents in mine roadways occur frequently, and post-disaster emergency rescue faces major challenges in terms of safety and efficiency. Therefore, efficient demolition equipment and intelligent prediction methods are urgently needed. Abrasive waterjet technology...

Lightweight structure-aware detection of coal and gangue under complex operating conditions

Accurate coal-gangue detection under complex operating conditions is crucial for reliable online perception in underground coal handling. To address degraded imaging, dense stacking, adhesion, and occlusion, this study proposes a lightweight structure-aware detector, LCGA-YOLO11,...

Multi-Parameter Nonlinear Acoustic Emission Precursors of Failure in Coal with Different Burst Tendencies

Acoustic emission (AE) monitoring is widely used to characterize coal failure, but specimens with different burst tendencies cannot be distinguished reliably using a single count, energy, b-value, or fractal indicator. This study reanalyzed archived Vallen AE data from uniaxial-c...

Mechanics-Permeability Similarities Between Natural-like and Natural Coal–Rock Specimens—A Comparative Study

Investigating the mechanics-permeability similarities between natural-like and natural gas-bearing coal–rock specimens provides a theoretical basis for using natural-like specimens as substitutes for natural ones in laboratory simulations of the incubation of coal–rock gas compos...

Numerical Investigation of Mixed Mode I-III Fracture Behavior in Sandstone Under Static and Dynamic Loading

Mixed mode I–III fracture commonly occurs in rock masses under complex three-dimensional stress states, yet the combined effects of loading conditions and fracture mode remain unclear. In this study, a heterogeneous sandstone disc model is developed in ABAQUS by coupling the Druc...

Direct Regeneration of Spent LiFePO 4 Using Methionine for Defect Repair and N/S‐Doped Interface Construction

ABSTRACT The coming wave of end‐of‐life electric vehicles presents a formidable challenge for the recycling of spent Li‐ion batteries, particularly those with LiFePO 4 cathodes. The degradation of the LiFePO 4 cathode is primarily attributed to Li loss‐induced lattice defects and...