Tsuyoshi Adachi

Prof. Tsuyoshi Adachi

Graduate School of International Resources Sciences, Akita University
orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 February 2023 in Applied Sciences
Verified
Journal Article
Open access
PDF file
Yewuhalashet FisshaYewuhalashet Fissha
Yewuhalashet Fissha
HIHajime Ikeda
Hajime Ikeda
HTHisatoshi Toriya
Hisatoshi Toriya
TATsuyoshi Adachi
Tsuyoshi Adachi
YKYouhei Kawamura
Youhei Kawamura
Rock blasting is one of the most common and cost-effective excavation techniques. However, rock blasting has various negative environmental effects, such as air overpressure, fly rock, and ground vibration. Ground vibration is the most hazardous of these inevitable impacts since it has a negative impact not only on the environment of the surrounding area but also on the human population and the rock itself. The PPV is the most critical base parameter practice for understanding, evaluating, and predicting ground vibration in terms of vibration velocity. This study aims to predict the blast-induced ground vibration of the Mikurahana quarry, using Bayesian neural network (BNN) and four machine learning techniques, namely, gradient boosting, k-neighbors, decision tree, and random forest. The proposed models were developed using eight input parameters, one output, and one hundred blasting datasets. The assessment of the suitability of one model in comparison to the others was conducted by using different performance evaluation metrics, such as R, RMSE, and MSE. Hence, this study compared the performances of the BNN model with four machine learning regression analyses, and found that the result from the BNN was superior, with a lower error: R = 0.94, RMSE = 0.17, and MSE = 0.03. Finally, after the evaluation of the models, SHAP was performed to describe the importance of the models’ features and to avoid the black box issue.

1 January 2022 in Waste Management
Verified
Journal Article
Closed access
JWJuntao Wang
Juntao Wang
WLWenhua li Li
Wenhua li Li
NMNozomu Mishima
Nozomu Mishima
TATsuyoshi Adachi
Tsuyoshi Adachi

28 May 2018 in Natural Resource Modeling
Verified
Journal Article
Closed access
PDF file
WLWenhua li Li
Wenhua li Li
TATsuyoshi Adachi
Tsuyoshi Adachi

10 May 2023 in Minerals
Verified
Journal Article
Open access
PDF file
NTNTSHIRI BATLILE TSAE
NTSHIRI BATLILE TSAE
TATsuyoshi Adachi
Tsuyoshi Adachi
YKYouhei Kawamura
Youhei Kawamura
Precise prediction of ore grade is essential in feasibility studies, mine planning, open-pit and underground optimization, and ore grade control. Conventional methods, such as geometric and geostatistical methods, are the most popular techniques for mineral resource estimation but fail to capture the complexity of orebodies. Due to this limitation, grades are incorrectly estimated, leading to inaccurate mine plans and costly financial decisions. Here, we propose an ore grade prediction method using an artificial neural network (ANN). We collected 14,294 datasets from the Jaguar mine in Western Australia. The proposed model was developed by incorporating lithology, alteration, eastings, northwards, altitude, dip, and azimuth to predict the grade, and the performance evaluation metrics were measured based on the mean absolute error (MAE), mean square error (MSE), root mean square error (RMSE), correlation coefficient, R, and coefficient of determination (R2). The proposed ANN model outperformed classic machine learning methods with R2, R, MAE, MSE, and RMSE of 0.584, 0.765, 0.0018, 0.0016, and 0.041, respectively. The Shapley technique was used to evaluate the feature importance of the input variables for the grade prediction. Lithology demonstrated the highest influence on ore prediction, whereas eastings had the least impact on output. The proposed approach is promising for ore model prediction.

25 February 2022 in Applied Sciences
Verified
Journal Article
Open access
PDF file
KKKursat Kilic
Kursat Kilic
HTHisatoshi Toriya
Hisatoshi Toriya
YKYoshino Kosugi
Yoshino Kosugi
TATsuyoshi Adachi
Tsuyoshi Adachi
YKYouhei Kawamura
Youhei Kawamura
An earth pressure balance (EPB) TBM is used in soft ground conditions, and these conditions lead to the fluctuation and instability of machine parameters. Machine parameters influence cutter wear and tunnel excavation. For this reason, to evaluate and predict the cutter wear of an EPB TBM, a 1D CNN model was used to provide machine-parameter-based cutter wear prediction using an EPB TBM operational dataset. The machine parameters were split into 80% training and 20% test datasets. Compared to traditional machine learning applications and two deep neural network models, the proposed model provided reliable results with a reasonable computational time. The correlation coefficient was 89.6% R2, the mean squared error (MSE) was 57.6, the mean absolute error (MAE) was 1.6, and the computational wall time was 3 min 22 s.

26 October 2023 in Mining
Verified
Journal Article
Open access
PDF file
Yewuhalashet FisshaYewuhalashet Fissha
Yewuhalashet Fissha
HIHajime Ikeda
Hajime Ikeda
HTHisatoshi Toriya
Hisatoshi Toriya
NONarihiro Owada
Narihiro Owada
TATsuyoshi Adachi
Tsuyoshi Adachi
YKYouhei Kawamura
Youhei Kawamura
Ground vibration is one of the most hazardous outcomes of blasting. It has a negative impact both on the environment and the human population near to the blasting area. To evaluate the magnitude of blasting vibrations, it is important to consider PPV as a fundamental critical base parameter practice in terms of vibration velocity. This study aims to explore the application of different soft computing techniques, including a Gaussian process regression (GPR), decision tree (DT), and support vector regression (SVR), for the prediction of blast-induced ground vibration (PPV) in quarry mining. The three models were evaluated using classical mathematical evaluation metrics (R2, RMSE, MSE, MAE). The result shows that the GPR model achieves an excellent prediction result; with R2 = 0.94, RMSE = 0.0384, MSE = 0.0014, and MAE = 0.0265, it shows high accuracy in predicting PPV. The Shapley additive explanation (SHAP) results emphasize the importance of understanding the interactions between the various factors and their effects on the vibration assessment. The findings can inform the development of more sustainable and environmentally friendly models for predicting blasting vibrations. Using a GPR to simulate and predict blasting-induced ground vibrations is the study’s main contribution. The GPR can capture complicated, non-linear correlations in data, making it ideal for blast-induced ground vibrations, which are dynamic and nonlinear. By using a Gaussian process regression, we can help companies and researchers improve the safety and efficiency in blast-induced ground vibration environments.