Results 81 to 90 of about 1,957 (248)
An autonomous robotic system for mapping abandoned mines
, 2003 We present the software architecture of a robotic system for mapping abandoned mines. The software is capable of acquiring consistent 2D maps of large mines with many cycles, represented as Markov random £elds.
S. Thayer +10 more
core
Carbon emission assessment of tunnel infrastructures: From construction to operation
Deep Underground Science and Engineering, EarlyView.This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long +4 more
wiley +1 more source
, 1992 With the promulgation of Bill 71 in June 1991, the closure of mines in the province of Ontario must meet stricter environmental conditions. The legacy of open shafts and derelict sites should be brought to an end.
Mackasey, W. O.
core
Deep Underground Science and Engineering, EarlyView.This research proposes an interpretable hybrid stacking ensemble framework, optimized by the Sparrow Search Algorithm, to enhance hard rock pillar stability prediction. By integrating six machine learning models—k‐nearest neighbors, support vector machines, random forests, Gradient Boosting Decision Tree, eXtreme Gradient Boosting, and Light Gradient ...
Ning Wang +3 more
wiley +1 more source
, 2022 In some cases, mine drainage containing heavy metals (arsenic, cadmium, lead, and other metals) continues to flow out from mine mouths and accumulation sites in abandoned metal mines.
Yasuhiro TAWARA +4 more
core +1 more source
Ecography, EarlyView.Global change is reshaping the distribution of biodiversity and the functioning of ecosystems. Predicting the long‐term consequences of such changes remains a challenge due to a need for a clear understanding of the mechanisms underpinning ecosystem‐level responses, as well as the role of geographical and environmental contingencies.
Miguel G. Matias +15 more
wiley +1 more source
Long-Term Stability Evaluation and Pillar Design Criterion for Room-and-Pillar Mines
Energies, 2017 The collapse of abandoned room-and-pillar mines is often violent and unpredictable. Safety concerns often resulted in mine closures with no post-mining stability evaluations.
Yang Yu +3 more
doaj +1 more source
, 2017 South Africa’s mining legacy has resulted in a large number of abandoned mines which pose ongoing environmental threats. The regulatory framework makes no provision for cases of abandoned mines, nor does the legislation delegate due responsibility or ...
Klopper, D., Wessels, J.A.
core +2 more sources
Potential Application of RES and Underground H2 Storage in Abandoned Mines
, 2023 Mining operations, as with all industrial operations, have a significant impact on the environment both through the generation of waste and through landscape change.
Sotiris Kottaridis +2 more
core +1 more source
Energy Science &Engineering, EarlyView.This study primarily investigates the optimal width for coal pillar retention in both sides of the worked‐out face section. Taking the 42201 haulage roadway of the 42201 working face at Shengxin Coal Mine as the primary research target, it analyses the optimum width for coal pillar retention through theoretical calculations, numerical simulations, and ...
Shuaifeng Yin +4 more
wiley +1 more source