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Topic Review
Impact of Stress Path on Rock Strength
The strength of rock is a non-intrinsic property, and this means that numerous parameters influence the strength values. In most laboratory experiments, specimens are free of stress at the start of the tests, and the load is increased systematically until failure occurs. Around excavations, the opposite path occurs, i.e., the rock is in equilibrium under a triaxial stress state and at least one stress component decreases while another component may increase. Hence, the stress paths in classic laboratory experiments are different from the in situ stress paths. In the research presented, the effect of these different stress paths on the failure processes and failure envelopes was studied. The micro-fracturing when loading rock (from zero or low stress state) until failure was different from the micro-fracturing when unloading rock (from the in situ stress state) until failure. And, hence, by this difference in weakening processes, the failure envelopes were significantly different. The conventional loading resulted in the largest strength and, thus, overestimated the rock strength in comparison to the real in situ behavior. This finding, after being confirmed by additional experiments, will have a direct effect on how one characterizes rock material and on the design of rock excavations.
  • 136
  • 03 Nov 2023
Topic Review
Urban Building Height Estimation Using Multiple Source Images
The use of remote sensing imagery has significantly enhanced the efficiency of building extraction; however, the precise estimation of building height remains a formidable challenge. In light of ongoing advancements in computer vision, numerous techniques leveraging convolutional neural networks and Transformers have been applied to remote sensing imagery, yielding promising outcomes.
  • 111
  • 18 Dec 2023
Topic Review
A Multimodal Robust for Coal Mine Mobile Robots
Mobile robots in complex underground coal mine environments are still unable to achieve accurate pose estimation and the real-time reconstruction of scenes with absolute geographic information. Integrated terrestrial-underground localization and mapping technologies have still not been effectively developed.
  • 104
  • 09 Nov 2023
Topic Review
Discrimination Methods of Mine Inrush Water Source
Ensuring mining safety and efficiency relies heavily on identifying the source of mine water inrush. The standard methods used to pinpoint the origin of mine water inrush are systematically classified into various categories, encompassing hydrochemistry examination, water level and temperature analysis, geostatistical approaches, machine learning and deep learning methods, as well as the utilization of other analytical techniques. 
  • 87
  • 15 Jan 2024
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