## 3 Highlights and Key Contributions of Published Articles
### Mining Engineering
Additionally, mining excavation encounters a series of technical issues, such as problems pertaining to the stability of the excavation process and the methods of excavation, among others. [PERSON] et al. (contribution 10) focused on addressing the issues of delamination and water leakage caused by fractures in Insulated Chilled Water Pipelines (ICWP) during long-distance drilling through deep strata. Additionally, they conduct a comprehensive analysis of the performance of a new composite-structured insulated cold transmission pipe under different stress conditions through a combination of experiments and numerical simulations, offering scientific evidence for enhancing the stability and longevity of the pipeline. [PERSON] et al. (contribution 14) explored smooth-surface blasting control technology, which aims to create smooth rock surfaces while minimizing damage. They identified air-spaced axial and radial uncoupled charges as effective structures for reducing blast wave intensity and peak gas pressure, thus improving fracture seam quality. Advances in drilling allowed for large-diameter light blast holes with oversized uncoupled coefficients, enhancing the method's efficiency and performance. However, large uncoupling coefficients have limitations. The study investigates the theory behind air spacing uncoupling charges,aligning them with critical coefficients and field requirements. Successful applications on a Guizhou slope demonstrate the effectiveness of these methods in engineering practices. In Polish copper ore mines, [PERSON] et al. (contribution 19) presented an analysis of the influence of excavation velocity on the possibility of escalating or reducing the described mining hazards. An analysis of the impact of excavation velocity on the state of gaseous geodynamic and roof fall hazards was conducted for two mining fields. For the considered mining fields, the authors hypothesized that an excavation velocity greater than or equal to 17 m/month positively influences the reduction in both gaseous geodynamic and roof fall hazards. [PERSON] et al. (contribution 24) examined the strength and deformation of coal samples to understand the stress-strain characteristics of pillars in room and pillar mining at the CSM Mine, noted as the deepest application of this method globally. The researchers investigated coal samples with slenderness ratios (width/height) ranging from 1 to 7.7 to assess their impact on coal strength. They determined the modulus of deformation relative to the slenderness ratio and calculated the vertical deformation and safety factor of the pillars. The study also considered how sampling methods affected the measured coal strengths. Some scholars have also studied the environmental impacts of mining and the utilization of mineral resources. [PERSON] et al. (contribution 25) modeled ground subsidence caused by the underground coal gasification (UCG) of four cavities, each measuring 30 m \(\times\) 30 m \(\times\) 15 m, separated by 15 m wide pillars. Two gasification sequences were analyzed. The final surface subsidence was 9.8 mm, with the sequence affecting only intermediate stages, not the final outcome, under elastic conditions. The maximum subsidence for different cavity sizes ranged from 0.016 mm to 7.14 mm, showing a linear relationship with cavity volume. A prediction model using elastic plate theory was developed, with a maximum discrepancy of 4.6% between the predicted and measured deformations, demonstrating its effectiveness. [PERSON] et al. (contribution 3) investigated the heat transfer and flow characteristics of coal slurry during pipeline transportation. They used computational fluid dynamics (CFD) methods to study the temperature distribution and flow structure in both straight and curved channels, finding that the cooling process affects the evolution of the streamline structure along the flow path. In colder fluids, the turning of the fluid in bends is sharper, streamlines overlap earlier within the bend, and the region of maximum velocity is wider.