China University of Mining and Technology

Mining-Sequence Effects on Slope Deformation and Stress Redistribution During Cemented Backfill Mining of Multiple Extra-Thick Coal Seams Beneath an Open-Pit Highwall

Cemented backfill mining has become an effective approach for recovering coal resources beneath open-pit highwalls while maintaining slope stability. However, the repeated extraction of multiple extra-thick coal seams induces complex overburden responses, and the effects of minin...

Study on the fracture characteristics controlled by filling ratio in cut-and-fill mining

To mitigate surface subsidence and stope instability induced by an insufficient filling ratio in cut‑and‑fill mining, this study investigates overlying strata fracture characteristics and instability mechanisms by means of similar material simulation, PFC numerical modeling, and...

Helium migration patterns in the ultra-deep reservoirs of the Anyue gas field

The Sinian–Cambrian reservoirs in the Anyue gas field contain over one trillion cubic meters of natural gas. These reservoirs are close to basement helium sources and have well-developed ancient formation water as a potential carrier. However, despite these favorable conditions,...

Digital transformation-driven supply chain resilience and sustainable supply chain performance: an empirical investigation of the fresh agricultural product industry

Purpose The fresh agricultural product supply chain, as a foundational industry critical for safeguarding people’s livelihoods, has increasingly encountered frequent external uncertainties in recent years. These disruptions severely undermine operational stability and precipitate...

Mode transition and critical spatial aspect ratio of propane-air deflagration in long confined spaces

Propane-air deflagration in long confined spaces depends on both the initial combustible-cloud extent and the enclosure geometry. However, the combined influence of these two factors on deflagration mode transition remains unclear. In this study, a three-dimensional CFD model was...

Factor Graph-Based Geomagnetic SLAM Approach for Smartphone-Based Indoor Localization

Indoor geomagnetic positioning provides a low-cost solution for smartphone-based localization without requiring additional infrastructure. However, conventional geomagnetic positioning methods depend on labor-intensive offline magnetic data surveys, limiting deployment flexibilit...

Phase-Transition-Induced Co–Fe2O3 Nanosheets from Upcycling Spent LiFePO4 for Oxygen Evolution

Abstract Spent LiFePO4 (LFP) batteries were upcycled into Co-modified Fe2O3 nanosheets (sFe2O3@Co) through an oxidative reconstruction, selective acid leaching, and Co incorporation. Phase-transition-induced confined growth generated defect-rich ultrathin Fe2O3 nanosheets, while...

Shear-Performance Analysis of Piezoelectric Anchors in Rock-Slope Monitoring

ABSTRACT Bolt-stress monitoring is essential for rock-slope stability, yet conventional methods often fail to capture internal stress evolution and shear-surface locations. This study develops a piezoelectric anchor integrated with a self-sensing piezoelectric geotechnical cable...

Alterations in Coal Permeability and Adsorption Capacity Post Oxidation Treatment: Insights into Enhancing Coalbed Methane Production

Abstract Organic matter dissolution by oxidants can enhance the coal permeability. However, as coalbed methane (CBM) is predominantly reserved in the adsorbed state, the organic matter dissolution changes the adsorption–desorption equilibrium, thus affecting the CBM production. C...

Boundary-consistent prospective appraisal of an unopened metro line: mobile-OD evidence from Shenzhen

Prospective metro appraisal requires evidence that supports both comparisons between alternatives and the scope of carbon claims. Using 4.82 million mobile OD records representing 159.1 million provider-inferred trips, we assess unopened Shenzhen Metro Line 17 Phase I. Seven-mode...

Research and application of directional fracturing roof cutting for lateral thick and hard roofs in shallow-buried large-section roadways

Abstract Aimed at the severe strata behavior hazards caused by the occurrence of lateral thick and hard roofs in shallow-buried large-section roadways, a directional fracturing and roof cutting technology for lateral thick and hard roof zones in shallow-buried large-section coal...

Plant litter promotes nitrate–sulfate co-removal in constructed wetlands: DOM dynamics and metagenomic insights into carbon, nitrogen, and sulfur transformations

Plant litter is a low-cost carbon source for constructed wetlands (CWs), but its effectiveness and associated microbial mechanisms in nitrate–sulfate co-contaminated wastewater remains insufficiently understood. This study evaluated cattail and reed litters as in situ carbon sour...

Layered double hydroxides cathode for long-lifespan dual ion batteries

Dual-ion batteries (DIBs) have garnered significant attention owing to their high volumetric energy density, cost-effectiveness and environmental friendliness. However, the most commonly used graphite cathode suffers from substantial volume changes and sluggish ion diffusion kine...

Scale-dependent bias in methane inventories: Satellite observations reveal overestimation from large coal mines in China

Accurate quantification of China's coal mine methane (CMM) emissions is important for methane mitigation, yet bottom-up inventories remain subject to substantial uncertainty. Using TROPOMI observations from 2020 to 2024 and the Integrated Methane Inversion (IMI) framework, we per...

Study on the relationship between the hydrophilic–lipophilic balance values of non-caking coal and sulfonate-type dispersants and prediction model for slurry concentration

This study quantified the hydrophilic–lipophilic balance (HLB) of non-caking coal and precisely adjusted the HLB values of sulfonate anionic dispersants to systematically investigate their matching relationship. The optimal match was found to be dispersant HLB2=HLB1±0.200. Matche...

Quantile-based homogeneity selection and similarity-weighted robust coherence matrix for distributed scatterer interferometry in mining deformation monitoring

Coal mining can lead to a series of geological issues, making it crucial to monitor surface deformation for early hazard warning in mining areas. Distributed Scatterer Interferometry (DSI) enables the monitoring of deformation in overlying strata above mining working faces. Howev...

A Study on the Enhanced Longitudinal Resolution in Radio-Electromagnetic Wave Transillumination Detection

Based on the governing equations of the electromagnetic radiation field and the theory of multi-layer media propagation, the governing equations for electromagnetic wave attenuation are derived. A stable solution to the resulting large-scale sparse linear system is obtained using...

High‐Entropy Perovskites for Solid Oxide Cells: Mechanistic Insights to Practical Applications

ABSTRACT Solid oxide cells (SOCs) are high‐temperature electrochemical platforms for efficient energy conversion and chemical production in both fuel‐cell and electrolysis modes. Practical deployment remains constrained by fuel‐electrode coking, limited transport, and sluggish ki...

Competitive Behavior of Polar and Nonpolar Shale Oil During CO2-Induced Mobilization in Water-Bearing Nanopores

Abstract The efficiency of CO2-enhanced oil recovery (EOR) in shale reservoirs is critically influenced by formation water and the complex chemistry of the crude oil. However, the roles of components in shale oil and its underlying mechanisms are lacking. In this work, molecular...

Creep and particle breakage in coral sand and development of a modified burgers model

This study investigates the high-pressure one-dimensional creep and progressive particle breakage of coral sand from the South China Sea. A series of high-pressure oedometer tests were performed under varying vertical stresses (1 ∼ 4 MPa), loading durations (up to 10,000 min), an...