Weizhang Liang

Central South University | CSU · School of Resources and Safety Engineering

The evaluation of rockburst hazard is significant for deep underground engineering. However, it is still a challenging task due to the uncertainty of rock mass properties. To evaluate the rockburst hazard reliably under uncertain environment, an integrated decision-making framework was proposed in this paper. First, considering the inherent inhomog...

Rockburst is a major disaster in deep mining engineering, which can cause serious injury, death and economic losses. This study aims to solve rockburst hazard evaluation problems and determine the hazard levels of mines under uncertain circumstances. To this end, a novel multicriteria decision-making (MCDM) method was proposed in an interval-valued...

Slope instability can lead to catastrophic consequences. However, predicting slope stability effectively is still challenging because of the complex mechanisms and multiple influencing factors. In recent years, machine learning (ML) has received great attention in slope stability prediction due to its strong nonlinear prediction ability. In this st...

Filling slurry can inevitably cause irreversible wear to the pipeline, which represents great costs to mines. This study aims to propose an extended set pair analysis (SPA) for the wear risk evaluation of backfill pipeline. First, to fully describe the wear risk of backfill pipeline, an evaluation index system was established from the aspects of sl...

Strainburst poses significant risks to the safety of workers in deep underground engineering. Assessing strainburst potential plays a crucial role in disaster prevention. Due to the anisotropy and heterogeneity of rock mass, it is essential to quantify the strainburst potential from the perspective of probability. This study aims to propose a metho...

The evaluation of rockburst damage potential plays a significant role in managing rockburst risk and guaranteeing the safety of personnel. However, it is still a challenging problem because of its complex mechanisms and numerous influencing factors. In this study, a bagged ensemble of Gaussian process classifiers (GPCs) is proposed to assess rockbu...

The stability of point-pillar is of crucial importance for the mines using point-pillar mining method. Instable pillars can cause the collapse of goaf roof and threaten the safety of workers. In this study, a hesitant fuzzy genetic algorithm-weighted distance-based approximation (GA-WDBA) approach is proposed to evaluate the stability of point-pill...

Rockburst is a severe geological disaster accompanied with the violent ejection of rock debris, which greatly threatens the safety of underground workers and equipment. This study aims to propose a novel multi-criteria decision-making (MCDM) approach for evaluating rockburst risk under uncertain environments. First, considering the heterogeneity of...

Due to the disturbance effect of excavation, the original stress is redistributed, resulting in an excavation damaged zone around the roadway. It is significant to predict the thickness of an excavation damaged zone because it directly affects the stability of roadways. This study used a sparrow search algorithm to improve a backpropagation neural...

Rockburst has become one of the most serious threats to the safety of workers, equipment, and excavations in deep underground engineering. However, short-term rockburst risk prediction remains an unsolved problem. This study aims to propose five ensemble classifiers to estimate the probability of short-term rockburst risk. These ensemble classifier...

Affected by the disturbance of blasting activities, deformation instability and rock dynamic disasters are prone to occur in deep hard rock roadways. Thus, it is particularly necessary to understand the failure behavior of rocks and roadways under dynamic loads. In this study, a series of impact loading tests were carried out on sandstone samples w...

In the practical decision-making process, it is common that more than one type of evaluation information is adopted for comprehensive assessment. For example, decision-makers are accustomed to evaluating quantitative evaluation information with real numbers, whereas evaluating qualitative evaluation information with fuzzy numbers. In this study, a...

Considering the mounting conflict of economic growth and environmental destruction, promoting sustainable development has become inevitable in many industries, especially for mines. This study focuses on developing suitable approaches to assess the sustainability for phosphorus mines. First, a comprehensive sustainability assessment criteria scheme...

Short-term rockburst risk prediction plays a crucial role in ensuring the safety of workers. However, it is a challenging task in deep rock engineering as it depends on many factors. More recently, machine learning approaches have started to be used to predict rockbursts. In this paper, ensemble learning methods including random forest (RF), adapti...

Predicting pillar stability is a vital task in hard rock mines as pillar instability can cause large-scale collapse hazards. However, it is challenging because the pillar stability is affected by many factors. With the accumulation of pillar stability cases, machine learning (ML) has shown great potential to predict pillar stability. This study aim...

Mine development scheme selection is an important project in mine construction, as the benefit of a mine is directly affected by the quality of the scheme. In this paper, we consider the selection problem of mine development scheme under fuzzy environment. Firstly, linguistic neutrosophic numbers (LNNs) are chosen to fully describe people’s linguis...

Considerable advances have been made from diverse perspectives in rockburst research to guarantee the safety of deep underground activities. However, to date, few reviews have been made to systematically analyze the overall research status of rockburst. This study is aimed at providing a scientometric review on rockburst research in hard rock from...

China is currently trying to reduce the environmental impact of metal mining operations by promoting green mining. However, conflicts of interest between the central government, local governments, and metal mining companies often negatively affect the implementation of related policies. This paper conducted a theoretical analysis of the game mechan...

The disposal of tailings is a vital process in mines. This study aims to address site selection issue of tailings pond using a suitable method. First, as different types of evaluation criteria exist, hybrid decision making information is considered. That is, crisp numbers are used to express quantitative values, while picture fuzzy numbers (PFNs) a...

It is quite often that rocks contain intersecting cracks. Therefore, crack behavior cannot be completely studied by only considering several isolated, single flaws. To investigate the crack behavior of rock or rock-like material containing intersecting flaws under uniaxial loading, numerical simulations were carried out using parallel bonded-partic...

Hole defects embedded in rocks have a crucial influence on their stability and failure mechanism. The purpose of this research is to explore the mechanical response and fracture behavior around inverted U-shaped openings in rocks under compressive stress. To begin with, a multitude of uniaxial compression experiments on prismatic sandstone samples...

The construction of Green Mine has become an essential policy for the management of mineral resources in China. This study aims to propose a favorable approach to assess the performance of Green Mine. The evaluation criteria are recognized based on the specific characteristics of Green Mine. Considering that some of these criteria could not be mutu...

This paper aims to investigate the fracture evolution around an inverted U-shaped opening under compressive loads. Firstly, a series of uniaxial compression tests were conducted on sandstone specimens containing a cavity incorporating digital image correlation (DIC) and acoustic emission (AE) techniques. Next, the complex variable theory combined w...

A thermal environment has many adverse effects on the safety and health of workers. Especially in an underground mining context, thermal hazards become more serious as mining depth increases. This study aims to find a suitable method for evaluating the thermal comfort in underground mines. First, considering the ambiguity of human thinking, picture...

This study systematically investigates the influence of hole shape on mechanical properties and fracture characteristics of rocks containing a hole under uniaxial loading. First, combined with digital image correlation (DIC) and acoustic emission (AE) equipment, quantities of uniaxial compression tests on brittle prismatic sandstone samples contain...

Safety is the fundamental guarantee for the sustainable development of mining enterprises. As the safety evaluation of mines is a complex system engineering project, consistent and inconsistent, even hesitant evaluation information may be contained simultaneously. Linguistic neutrosophic numbers (LNNs), as the extensions of linguistic terms, are ef...

Mining method selection (MMS) is one of the core contents in mining design. As the influencing factors of MMS are in general of ambiguity or uncertainty, MMS can therefore be deemed as a complex fuzzy multi-criteria decision making problem. To resolve this problem, an extended multi-objective optimization by ratio analysis plus the full multiplicat...

The mining method optimization in subsea deep gold mines was studied. First, an index system for subsea mining method selection was established based on technical feasibility, security status, economic benefit, and management complexity. Next, an evaluation matrix containing crisp numbers and triangular fuzzy numbers (TFNs) was constructed to descr...

Optimization is considered as a decision-making process to get the most out of available resources for the best attainable results. Many real-world problems are multi-objective or multiattribute problems that naturally involve several competing objectives that are required to be optimized simultaneously, while respecting some constraints or selecti...

To understand the failure mechanism of trapezoidal opening in rock engineering, the fracture evolution of rock containing a cavity under compression was investigated analytically and experimentally in this study. Firstly, the complex variable theory was employed to find the general solution for rock stress around a trapezoidal cavity under biaxial...

Due to various environmental issues caused by resource exploitation, establishing green mines is an essential measure to realize sustainable growth for mining companies. This research aimed to develop a novel methodology to evaluate the performance of green mines within hesitant fuzzy conditions. First, hesitant fuzzy sets (HFSs) were used to expre...

In this paper, the cracking behaviour of rocks with a hole loaded in compression was investigated both experimentally and theoretically. First, a series of uniaxial compression tests on prismatic red sandstone specimens containing a circular or a rectangular hole were performed using a rock mechanics testing system in conjunction with digital image...

A rockburst is a severe and unexpected damaging seismic event caused by the violent release of accumulated strain energy. To assess the risk of rockbursting, three distance-based multi-criteria decision making (MCDM) approaches with hesitant fuzzy information are proposed. First, considering that each criterion has more than one possible value due...

To investigate the mechanical properties, damage characteristics, and fracturing behaviour of specimens with a cavity formed by intersecting excavations, a series of uniaxial compression tests were conducted incorporating digital image correlation (DIC) and acoustic emission (AE) techniques. PFC2D modelling was conducted to further study the failur...

Failure of underground structures, especially intersections, becomes more severe as the depth increases, which poses a new challenge for the safe construction and operation of deep rock engineering. To investigate the mechanical properties and fracture behavior of rock with an intersecting hole under compressive loads, a series of uniaxial compress...

Whether a roadway support scheme is reasonable or not significantly affects the safety of workers and the mining efficiency of mines. This paper concentrates on the optimization of roadway support schemes with group decision making methods. At first, in order to convey the decision makers’ preference more fully and aptly, assessment information for...

The rockburst is a severe underground geological disaster, which has great damage to the workers, equipments and engineering structures. This paper aims to find a suitable way to assess the risk of rockburst within complicated decision making circumstances. First, plenty of literature related to the risk assessment indexes and methods of rockburst...

Implementing cleaner production (CP) is effective to resolve the contradiction between economic growth and environmental crisis. To avoid destroying the ecological environment in the exploitation process of mineral resources, CP has been developed in many gold mines to achieve the goal of sustainable development. Thus, this paper aims to propose a...

Land reclamation has become a significant way for the improvement of ecological environment in mining areas. When selecting the optimal land reclamation scheme, LNNs (linguistic neutrosophic numbers) are suitable to describe the complex fuzzy evaluation information through linguistic truth, indeterminacy and falsity membership degrees. Furthermore,...

Faced with the contradiction between economic growth and environmental pollution, implementing cleaner production has become a good choice for many mining companies to achieve sustainable development. This study aims to evaluate the cleaner production for gold mines by exploring applicable decision making methods. First, the PFNs (picture fuzzy num...

Ventilation systems are amongst the most essential components of a mine. As the indicators of ventilation systems are in general of ambiguity or uncertainty, the selection of ventilation systems can therefore be regarded as a complex fuzzy decision making problem. In order to solve such problems, a decision making framework based on a new concept,...

A numerical model based on finite difference method(FDM) in FLAC3D is proposed to simulate the fracture of nonuniform rock materials. Weibull distribution is introduced to describe the distribution characteristics of elastic modulus and uniaxial compressive strength in each mesoscopic element which exhibits elastoplastic strain softening mechanical...

A large number of accidents caused by goafs have great influence on the ecological environment and public safety. In order to assess the risk degrees of goafs, a hybrid Tomada de Decisão Interativa Multicritério (TODIM) method is proposed in this paper. Firstly, on account of the geological conditions, shape parameters and environmental factors, an...

Confronting the dilemma of resource shortage and environmental pollution, the idea of circular economy (CE) has attracted widespread attentions. To address these problems, several industrial companies have incorporated the CE in their operation or design. In this sense, the phosphorus chemical firms (PCFs) are promoting CE to achieve sustainable de...

The investment in and development of mineral resources play an important role in the national economy. A good mining project investment can improve economic efficiency and increase social wealth. Faced with the complexity and uncertainty of a mine’s circumstances, there is great significance in evaluating investment risk scientifically. In order to...

In order to determine the extent of excavation damaged zone around roadway more reasonably, a new prediction method is proposed based on the dimensional analysis theory. Some physical quantities such as rock uniaxial compressive strength Rc, joint coefficient of rock F, unit weight of rock γ, depth of roadway H, maximum horizontal principal stress...