The fracture behavior of coal-seam roof rock in coal mining is a key and controlling factor for the mode optimization artificial caving. However, mechanism under loading not clear. In work, split Hopkinson pressure bar (SHPB) experiment was carried out using semicircular bending samples from sandstone Junger area Inner Mongolia at rate 0.35–3.78 GPa·m 0.5 ·s −1 , dynamic energy dissipation diff...

3D building reconstruction from remote sensing image data from satellites is still an active research topic and very valuable for 3D city modelling. The roof model is the most important component to reconstruct the Level of Details 2 (LoD2) for a building in 3D modelling. While the general solution for roof modelling relies on the detailed cues (such as lines, corners and planes) extracted from...

Green roof assemblies influence the total roof surface energy balance for a building. The energy balance for a green roof depends mostly on the selection of plants and substrates suitable for the building’s location. This study measured thermal properties of common green roof materials and selected two types of plants and substrates to simulate transient thermal performance of different green r...

The process of roadway surrounding rock deformation and instability is always accompanied by energy changes, the transformation directly drives its failure. In order to realize stability control mining roadway, distribution elastic strain plastic was analyzed using FLAC3D numerical simulation software on basis law sandstone under different confining pressures revealed indoor triaxial compressio...

Chen-Pu Li, 2 Hong-Bin Chen, 4 and Zhi-Gang Zheng 4, ∗ 1 Department of Physics, Beijing Normal University, Beijing 100875, China 2 College of Science, Hebei University of Architecture, Zhang Jiakou 075000 ,China Institute of Systems Science (ISS), Huaqiao University, Xiamen 361021, China College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China (Dated: October 5, ...

To explore the bolt-grouting method of deep roadway under three-dimensional unequal ground stress, a unidirectional coupling model surrounding rock plastic failure and grouting diffusion considering influence excavation disturbance stress was established. Spatial evolution characteristics diffusion, impact spacing row bolts/cables on grout were simulated by using numerical method. The results r...

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This paper compares the paradigms of LiDAR and aerophotogrammetry in the context of building extraction and briefly discusses two roof building contour extraction methodologies. The assets and drawbacks of both data capturing system have been reported several times. In general, empirical and theoretical studies have confirmed that LiDAR methodologies are more suitable in deriving building heigh...

A green roof can reduce the peak thermal cooling loads and reduce the building energy consumption during the summer. It is also necessary to understand the thermal performance of these green roof assemblies during the winter when affected by an accumulation of snow on the rooftops. This study presents an experimental investigation and discusses the snow influence on the heat transfer processes ...

Developing longwall mining under weak geological conditions imposes a substantial challenge with regard to the higher risk of falling roofs. Maintaining stability face in this aforementioned condition is crucial for smooth operation. Investigating roof requires detailed study rock behavior response few key influences. This paper presents outcome numerical analysis shallow depth conditions. A se...