China National Administration of Coal Geology

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...

Physics-Informed Neural Networks for One-Dimensional Groundwater Contaminant Transport: A Synthetic Numerical Study of Prediction and Parameter Inversion

This study developed a physics-informed neural network (PINN) surrogate model for a one-dimensional synthetic groundwater contaminant-transport problem with adsorption, using Crank–Nicolson numerical solutions as the reference data. The effects of observation density and noise on...

Research status and development trends of post-combustion CO2 capture technology

Against the backdrop of global energy conservation and emission reduction, as well as China’s dual-carbon strategy of “carbon peaking and carbon neutrality”, targeted research on CO 2 capture technology suitable for different working conditions has become an increasingly importan...

Multiscale Pore Architecture and Fractal Heterogeneity of Coal, Shale, and Tight Sandstone: An Integrated HMIP–N2/CO2 Adsorption–NMR Characterization Framework

Abstract Comprehensive characterization of multiscale pore structures in unconventional reservoirs is crucial for evaluating gas storage, migration pathways, and production potential. This study presents an integrated, multimethod investigation of Lower Jurassic low-rank coal, lo...

Experimental Study on Temperature–Pressure Coupling Sensitivity and Burial Depth Response of Coal Permeability

The coupled effect of in situ temperature and stress complicates the permeability evolution of coal reservoirs, which restricts the exploration and evaluation of deep coalbed methane (CBM). Two high-rank coal samples were collected from the Sihe (SH) and Zhaozhuang (ZZ) mining ar...

Amorphous MOF / Crystalline Bi 2 MoO 6 Heterojunction Interfaces: Engineering Quantum Dots and Electron Bridges for Synergistic High‐Efficiency Photocatalytic Nitrogen Fixation

ABSTRACT Conventional photocatalysts pronounced electron‐hole recombination and a limited number of active sites. To address these challenges, Bi‐N bridged bonds were interlinked at the interface of the heterojunction via coating crystalline Bi 2 MoO 6 with amorphous MOF (Bi 2 Mo...

Characteristics of Flue Gas Dechlorination by Ethanol-Digested Calcium Oxide and Its Effect on Mercury Speciation and Concentration

This study aims to investigate the feasibility of ethanol-digested calcium oxide (CaO-E) as a novel dechlorination sorbent for the efficient removal of hydrogen chloride (HCl) from coal-fired flue gas and further evaluate its influence on mercury speciation and transformation in...

Sequence Stratigraphic Framework and Coal Accumulation of the Lopingian Longtan Formation in the Sichuan Basin, South China

ABSTRACT The Lopingian Longtan Formation in the Sichuan Basin is a representative coal‐bearing succession deposited in a marine–continental transitional setting. Pronounced lateral variability in depositional environments and the subtle expression of sequence‐stratigraphic surfac...

Normal-stress unclamping promotes cascading instability in deep mining-induced seismicity

Deep mining-induced seismicity poses a severe dynamic hazard and offers a near-field setting for examining fault interaction under rapidly evolving excavation-induced stress fields. Conventional stress-concentration frameworks may overlook failure paths governed by normal-confine...

Wavelength- and Energy-Dependent Nonlinear Absorption and Transient Absorption in Silver Nanoparticles

Nonlinear absorption (NLA) in silver nanoparticles (Ag NPs) is strongly affected by plasmonic field enhancement. However, its wavelength- and energy-dependent evolution on the red side of the surface plasmon resonance (SPR) band remains insufficiently understood. Here, we systema...