Zobrazeno 1 - 10
of 280
pro vyhledávání: '"Hideki, Shimada"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-22 (2024)
Abstract Traditional rectangular tunnel boring machines have low tunneling efficiency, poor soil mixing effects, which has hindered the construction of long-distance and large-section box jacking projects. To overcome these limitations, a new type of
Externí odkaz:
https://doaj.org/article/7fa8fdd9275e4a40bf8b5304d0a2635a
Autor:
Rika Iriguchi, Akihiro Hamanaka, Fa-qiang Su, Takashi Sasaoka, Hideki Shimada, Ken-ichi Itakura, Kazuhiro Takahashi, Jun-ichi Kodama, Gota Deguchi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-18 (2024)
Abstract Underground coal gasification (UCG) is process of directly recovering energy as combustible gases such as hydrogen and carbon monoxide by combusting unmined coal resources in situ. During UCG process, the temperature in the gasification zone
Externí odkaz:
https://doaj.org/article/8c331081f2d54fbd95fd7e9c66c1deb1
Publikováno v:
Eng, Vol 5, Iss 3, Pp 1905-1936 (2024)
Accurate estimation of the mean fragment size is crucial for optimizing open-pit mining operations. This study presents an approach that combines clustering, hyperparameter optimization, and data augmentation to enhance prediction accuracy using the
Externí odkaz:
https://doaj.org/article/80cfa2ff3d9b47a0aa93c42fe52102c8
Autor:
Akihiro HAMANAKA, Yuma ISHII, Ken-ichi ITAKURA, Fa-qiang SU, Jun-ichi KODAMA, Takashi SASAOKA, Hideki SHIMADA, Gota DEGUCHI
Publikováno v:
Journal of MMIJ, Vol 140, Iss 6, Pp 50-57 (2024)
Underground Coal Gasification (UCG) is a promising process for recovering energy from potential underground coal resources as combustible gases such as hydrogen and carbon monoxide. The gasification process that occurs underground is an invisible phe
Externí odkaz:
https://doaj.org/article/0520f49cf2a84f8593919d2e05a3757b
Autor:
Ian Krop, Yoshiaki Takahashi, Takashi Sasaoka, Hideki Shimada, Akihiro Hamanaka, Joan Onyango
Publikováno v:
IEEE Access, Vol 12, Pp 8585-8608 (2024)
This paper presents an alternative methodology for the study of flyrock hazards in mining, utilizing Artificial Intelligence (AI) through machine learning by classification. By using distance as a delineator to denote the consequences of a blast, the
Externí odkaz:
https://doaj.org/article/bca5df45ab0a4ed6a74f9b03980c3804
Autor:
Rika Iriguchi, Yuma Ishii, Akihiro Hamanaka, Faqiang Su, Ken-ichi Itakura, Jun-ichi Kodama, Takashi Sasaoka, Hideki Shimada, Gota Deguchi
Publikováno v:
Eng, Vol 4, Iss 4, Pp 2960-2977 (2023)
Underground coal gasification (UCG) is the process of directly recovering energy as combustible gases such as hydrogen and carbon monoxide by combusting unmined coal resources in situ. The UCG process is an invisible phenomenon, in which fracturing a
Externí odkaz:
https://doaj.org/article/ecd8b263d3bf4f399dd5367d80e4f2f8
Publikováno v:
Applied Sciences, Vol 14, Iss 17, p 7792 (2024)
In order to cope with climate change and achieve the goal of carbon neutrality, the use of carbonization technology to enhance the performance of cement-based materials and achieve the purpose of carbon sequestration has become a very promising resea
Externí odkaz:
https://doaj.org/article/c7e638b0368e48568f4e9197efd85955
Autor:
Seelae Phaisopha, Hideki Shimada, Takashi Sasaoka, Akihiro Hamanaka, Phanthoudeth Pongpanya, Seva Shorin, Khounma Senthavisouk
Publikováno v:
Mining, Vol 3, Iss 3, Pp 463-482 (2023)
This study investigates the transition from surface to underground mining at the Sepon Gold mine. The stability of surface slopes is assessed prior to commencing underground operations. Stope mining is adopted based on ore body characteristics and ge
Externí odkaz:
https://doaj.org/article/c775d854790a490fb94c6786015c9e7d
Autor:
Akihiro Hamanaka, Yuma Ishii, Ken-ichi Itakura, Takashi Sasaoka, Hideki Shimada, Nuhindro Priagung Widodo, Budi Sulistianto, Jun-ichi Kodama, Gota Deguchi
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Underground Coal Gasification (UCG) requires monitoring of the gasification area because the gasification process is invisible and the reaction temperature exceeds 1000 °C. Many fracturing events that occurred due to coal heating can be cap
Externí odkaz:
https://doaj.org/article/281d3526d9124da0acc616cc526cd6dd
Publikováno v:
Mining, Vol 2, Iss 3, Pp 589-615 (2022)
Vipingo quarry in Kilifi county, Kenya, is one of the quarries supplying coral limestone for limestone manufacturing in the coastal region. Due to its close proximity to the Indian ocean, the semidiurnal ocean tides tend to have an influence on the s
Externí odkaz:
https://doaj.org/article/2cd319f1f71044bc8175bc6805690296