Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering

Topic Information

Dear Colleagues,

In recent decades, the design and construction of geotechnical engineering such as mines, tunnels, hydropower stations, and nuclear waste repositories have been surging in scale, and this trend is expected to continue in the future. These large-scale engineering projects are closely related to rock mechanics and mining engineering. As rock engineering goes increasingly deeper for exploitations, the rock masses are susceptible to the effects of high temperatures and high in situ stresses. The complex engineering environment often leads to the instability of engineering rock mass. Hence, it is necessary to use various means to study the behavior of rock mass under THM coupling and optimize the design for safe and efficient mining practices. Mathematical modeling and numerical simulation have become indispensable tools in this field, enabling engineers and scientists to better understand and predict the behavior of rock masses and design effective mining strategies.

This Topic on "Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering" aims to provide a platform for researchers to present their latest advances in this rapidly evolving field. The issue will cover a wide range of topics, including but not limited to constitutive modeling of rock materials, numerical methods for rock mechanics (FEM, XFEM, SPH, DDA, DEM, FDEM and NMM, etc.), rock fracture mechanics, numerical simulation of mining processes, geotechnical monitoring and control, and optimization of mining practices. This issue can serve as the missing link between numerical models and engineering practices. Therefore, "Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering” is dedicated to and welcomes all relevant scientific research in order to deepen the understanding of mathematical modeling and numerical simulation in rock masses. Authors are invited to submit their relevant research contributions to this Topic.

Prof. Dr. Fei Tan
Dr. Qiao Wang
Dr. Huachuan Wang
Dr. Defu Tong
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Mathematics mathematics	2.4	3.5	2013	16.9 Days	CHF 2600
Minerals minerals	2.5	3.9	2011	18.7 Days	CHF 2400
Remote Sensing remotesensing	5.0	7.9	2009	23 Days	CHF 2700
Sustainability sustainability	3.9	5.8	2009	18.8 Days	CHF 2400

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Published Papers (3 papers)

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15 pages, 11512 KiB  

Open AccessArticle

New Model and Finite Element Analysis of the Anti-Extrusion Strength of Backfill Drilling Pipelines

by Hao Li, Hongjiang Wang and Chunkang Liu

Minerals 2024, 14(4), 365; https://doi.org/10.3390/min14040365 - 29 Mar 2024

Viewed by 461

Abstract

Currently, in some domestic and foreign mines, the backfill drilling pipeline experiences a rupture phenomenon even when the wear degree is low. This results in a delay in production due to the filling becoming ‘sick’. This paper presents, for the first time, the [...] Read more.

Currently, in some domestic and foreign mines, the backfill drilling pipeline experiences a rupture phenomenon even when the wear degree is low. This results in a delay in production due to the filling becoming ‘sick’. This paper presents, for the first time, the damage mechanism from a mechanical perspective and re-derives the anti-extrusion strength model of the backfill drilling pipeline. We investigate the influence of the law on the anti-extrusion strength of pipelines from the perspective of strata and cement rings. We then verify the theoretical and simulation results through engineering examples. The results demonstrate that the Mises stress criterion is a suitable modification principle for the anti-extrusion strength model of the backfill drilling pipeline. The anti-extrusion strength of the pipeline is related to the elastic modulus and Poisson’s ratio of the stratum, and the thickness of the cement ring. It is negatively affected by the depth of the stratum. For hard strata, a cement ring with a smaller elastic modulus is suitable, while for soft stratum, a cement ring with a larger elastic modulus is recommended. When the missing angle of the cement ring is less than 60°, the stress concentration factor increases up to 2.2. The stress unloading capacity of the cement ring ranges from 32.7% to 37.8%, and optimal performance of the cement ring is achieved when it has high strength and low rigidity. The backfill filling pipeline of a copper mine abroad was destroyed due to external extrusion force exceeding its anti-extrusion strength value. The modified pipeline anti-extrusion strength model is 18.2% higher than the pipeline API strength value. This finding can inform the design of the backfill filling pipeline for China’s kilometer-deep wells in the future. Full article

(This article belongs to the Topic Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering)

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14 pages, 2948 KiB  

Open AccessArticle

Construction and Application of an Intelligent Prediction Model for the Coal Pillar Width of a Fully Mechanized Caving Face Based on the Fusion of Multiple Physical Parameters

by Zhenguo Yan, Huachuan Wang, Huicong Xu, Jingdao Fan and Weixi Ding

Sustainability 2024, 16(3), 986; https://doi.org/10.3390/su16030986 - 23 Jan 2024

Viewed by 572

Abstract

The scientific and reasonable width of coal pillars is of great significance to ensure safe and sustainable mining in the western mining area of China. To achieve a precise analysis of the reasonable width of coal pillars in fully mechanized caving face sections [...] Read more.

The scientific and reasonable width of coal pillars is of great significance to ensure safe and sustainable mining in the western mining area of China. To achieve a precise analysis of the reasonable width of coal pillars in fully mechanized caving face sections of gently inclined coal seams in western China, this paper analyzes and studies various factors that affect the retention of coal pillars in the section, and calculates the correlation coefficients between these influencing factors. We selected parameters with good universality and established a data set of gently inclined coal seams based on 106 collected engineering cases. We used the LSTM algorithm loaded with a simulated annealing algorithm for training, and constructed a coal pillar width prediction model. Compared with other prediction algorithms such as the original LSTM algorithm, the residual sum of squares and root mean square error were reduced by 27.2% and 24.2%, respectively, and the correlation coefficient was increased by 12.6%. An engineering case analysis was conducted using the W1123 working face of the Kuangou Coal Mine. The engineering verification showed that the SA-CNN-LSTM coal pillar width prediction model established in this paper has good stability and accuracy for multi-parameter nonlinear coupling prediction results. We have established an effective solution for achieving the accurate reservation of coal pillar widths in the fully mechanized caving faces of gently inclined coal seams. Full article

(This article belongs to the Topic Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering)

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18 pages, 8654 KiB  

Open AccessArticle

Surface Subsidence Prediction Method for Backfill Mining in Shallow Coal Seams with Hard Roofs for Building Protection

by Wenqi Huo, Huaizhan Li, Guangli Guo, Yuezong Wang and Yafei Yuan

Sustainability 2023, 15(22), 15791; https://doi.org/10.3390/su152215791 - 09 Nov 2023

Cited by 1 | Viewed by 707

Abstract

The mining of shallow coal seams with hard roofs poses a threat to surface structures. In order to ensure the protection of these buildings, backfill mining is increasingly used in these types of coal seams. However, due to the lack of appropriate surface [...] Read more.

The mining of shallow coal seams with hard roofs poses a threat to surface structures. In order to ensure the protection of these buildings, backfill mining is increasingly used in these types of coal seams. However, due to the lack of appropriate surface subsidence prediction methods, there are concerns about whether backfill mining can meet the requirements of building protection. In this study, through numerical simulation and physical experiments, the movement characteristics of the strata and surface were studied in the backfill mining of a shallow coal seam with a hard roof. Our results indicate that the backfilling ratio significantly influences strata movement and surface subsidence. As the backfilling ratio increases, the surface deformation in the backfill under the hard roof of the shallow coal seam transitions from discontinuous to continuous. When the backfilling ratio exceeds 60%, the deformation characteristics of the overburden and surface align with the probability integral method model. Consequently, a novel surface subsidence prediction method for backfill mining in shallow coal seams under hard roofs is proposed. This method was successfully applied at Yungang Mine, validating its effectiveness. These research findings have significant practical implications for the design of backfill mining in shallow coal seams under hard roofs. Full article

(This article belongs to the Topic Mathematical Modeling and Numerical Simulation in Rock Mechanics and Mining Engineering)

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