China University of Mining and Technology

A federated learning model enables secure data sharing across regions in digital governance

To support secure collaboration among heterogeneous regional governance nodes, this study develops a governance-constrained federated learning model for cross-regional data sharing. Different from conventional federated learning security frameworks that separately deploy privacy...

Synthesis of a novel cationic short-chain fluorocarbon surfactant and its synergistic effect with hydrocarbon surfactants for enhanced foam performance

Short-chain fluorocarbon surfactants are key alternatives to long-chain fluorocarbon surfactants, while the research on their cationic formulations remains limited. This study synthesizes a novel quaternary ammonium cationic short-chain fluorocarbon surfactant ( PFH-QAC ) and enh...

Experimental Investigation on Mechanical Behavior of Sandstone Containing Two Non‐Coplanar Fissures Under Triaxial Monotonic and Multilevel Cyclic Loading

ABSTRACT Natural rock masses with complex fissures are frequently subjected to multilevel cyclic loading during underground engineering construction. The effect of fissure layout patterns and confining pressure on the fatigue mechanical behavior of fissured rocks remains poorly u...

Identifying and Analyzing Key Risk Factors for Subway Construction Accidents: An Integrated Approach Using Association Rules and Complex Network Theory

Abstract With the continuous expansion of the scale of subway construction, the associated risks and uncertainties have been increasing accordingly. Once an accident occurs, it may pose a substantial threat to personnel safety. Therefore, to effectively prevent subway constructio...

A Six-Degree-of-Freedom Wave Compensation Parallel Robot with Triple-Loop Fractional-Order PI Control Optimized by Tuna Swarm Optimization

For high-precision attitude adjustment tasks of a six-degree-of-freedom (6-DOF) wave-compensation parallel robot in shipborne applications, strong non-stationary wave excitations, abrupt load changes, and broadband disturbances jointly challenge tracking accuracy and smoothness....

Automatic Recognition of Category, Burial Depth, and Diameter for Underground Pipeline Using GPR Based on YOLOv12 and Machine Learning Algorithm

Abstract Underground pipelines play a vital role in urban operation and development, and the rapid and accurate detection of their distribution remains an urgent challenge. Ground-penetrating radar (GPR) technology has been widely adopted for underground pipeline detection. There...

In Situ Stress Prediction Using Multiple Seismic Attributes Based on the Random Forest Algorithm

ABSTRACT In situ stress characterisation is crucial for the exploration and development of coal resources. Conventional methods based on well‐log data offer high‐accuracy point measurements but are limited to wellbore locations, whereas traditional seismic‐based predictions provi...

Coal wall stability and top-coal failure mechanisms under thick and hard roof conditions in a fully mechanized top-coal caving face: a case study

Fully mechanized top-coal caving mining in extra-thick coal seams under thick and hard roof conditions is often accompanied by prominent problems such as severe coal wall spalling, insufficient top-coal fragmentation, delayed caving, large-area hanging roof, and strong ground pre...

Dynamic properties of rock bolted by high performance NPR anchor bolts with different preloads

NPR (Negative Poisson's Ratio) bolts are advanced support materials engineered for stabilizing deep underground excavations, distinguished by their exceptional deformability and energy absorption capacity. This work examines how bolt preload affects the dynamic response of bolted...

Fractal Acoustic Emission Characteristics and Energy Evolution of High-Water-Resistance Concrete Backfill: Roles of Water-to-Cement Ratio and Fiber Volume Fraction

Fiber-reinforced high-water-resistance concrete backfill (FHWCB) is a rapid-setting cementitious backfill system used for underground support and backfilling, but its stability is strongly affected by mixture water content and fiber dispersion. This study investigated the fresh-s...

Progress on Halide Solid State Electrolytes: Structural Regulation, Interfacial Engineering, and Machine Learning Driven Paradigms

Abstract Halide solid state electrolytes are applicable for all-solid-state batteries due to their favorable ionic conductivity, desirable mechanical deformability, and wide electrochemical stability window. Here we review recent advances in both lithium-based and sodium-based ha...

MultifunctionalGreen Depressant for Selective CalciteDepression in Cassiterite Flotation: Interfacial Adsorption and HydrationMechanism

Abstract Cassiterite (SnO2), the primary mineral resource for tin production, is commonly associated with calcium-bearing gangue minerals, such as calcite, and their similar flotation responses remain a major challenge for selective separation. In this study, chondroitin sulfate...

Field-Validated Induced-Voltage Testing and Power-Supply Capacity Calibration for Converter Transformer Systems Considering Parasitic Capacitance

Field voltage testing after the maintenance of large converter transformers requires high-voltage response verification while preserving the restored equipment boundary. However, conventional direct voltage application on the grid side usually requires the disconnection of high-v...

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...

Simulation-Based Performance and Limitations of Photovoltaic and Solar Water Heating Systems in a Passive-Designed Rural House

Rural houses in cold regions of China usually have high energy demands, particularly for space heating and domestic hot water. Passive design can reduce building energy demand, but additional renewable energy systems are still needed to improve on-site energy supply. This study e...

Hydraulic Support Loading in a Deep Longwall Face with Large Dip and Advance Angles: Distribution Characteristics and Mechanical Interpretation

Deep longwall mining under large dip and advance inclinations can induce strongly asymmetric roof deformation and nonuniform load transfer, complicating the assessment of hydraulic support loading. Taking the 2902 working face of Chensilou Coal Mine as an engineering case, this s...

Deformation Detection and Structural Failure Mechanism of Large Mine Chutes: A Three-Chute Case Study at an Iron Mine

To examine the deformation behavior and failure mechanisms of large-scale mine chutes under complex service conditions, we performed multiple C-ALS three-dimensional laser scanning surveys on the 1#, 2# and 3# chutes at an iron mine in Anhui Province. The results showed that all...

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...

Structured Multi-Kernel Heteroscedastic Gaussian Process for Crop Straw-to-Grain Ratio Prediction and Uncertainty Quantification

Crop straw-to-grain ratio (SGR) estimation underpins regional straw resource assessment, yet national inventories rely on fixed coefficients that ignore structured variation across variety, environment, and phenotype. We introduce a Structured Multi-Kernel Heteroscedastic Gaussia...

A Novel Hybrid Active-Passive Neutral-Point-Clamped Multilevel Conversion Topology

This paper presents a novel multilevel neutral-point-clamped (NPC) topology featuring a combination of active (transistor) and passive (diode) clamping. The topology leverages the main benefits of both purely-passive and purely-active NPC topologies. It allows concentrating switc...