Dayang Zulaika Abang Hasbollah

Geological Distribution and Downstream Product Potential of Silica Sand and Kaolin Resources in Sarawak, Malaysia

Mohamad Fiqry Mohd Latif, Dayang Zulaika Abang Hasbollah, Nurul Syafida Abu Bakar, Bakhtiar Affandy Othman et autres

This study integrates statewide occurrence mapping with primary field and laboratory data from two Marudi silica sand samples (BKG01 and BKG02) and two Telagus kaolin samples (K001 and K005) to support downstream screening for planning purposes in Sarawak, Malaysia. Laboratory analysis included …

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Optimal Slope Angles and Berm Configurations for Rockfall Hazard Reduction Using Discrete Element Modelling and Statistical Analysis

Muhammad Aminuddin Khalid, Mohd Firdaus Md Dan, Faizal Pakir, Khaidir Abu Talib et autres

Construction on hilly terrains in Malaysia increases the risk of rockslides, which pose a threat to lives and infrastructure. Despite extensive studies on rockfall dynamics, the influence of slope angles on the destructive reach and kinetic energy (KE) of falling boulders remains …

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UAV-based rock mass characterization for geological strength index (GSI) assessment and comparison with conventional field mapping

Ahmad Zharfan Ahmad Husaini, Vynotdni Rathinasamy, Mohamad Syazwan Mohd Roslee, Mohd Ashraf Mohamad Ismail et autres

Rock mass characterization is essential for reliable Geological Strength Index (GSI) estimation, particularly in inaccessible or steep slopes where conventional field mapping is challenging. This study evaluates the feasibility of utilizing Unmanned Aerial Vehicle (UAV)-based photogrammetry for GSI assessment using the Cai …

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Effect of Slope Height on Coefficient of Restitution and Energy Dissipation in Laboratory Testing

Muhammad Haziq Fikri Lokman, Mohd Firdaus Md Dan Azlan, Aniza Ibrahim, Aizat Mohd Taib et autres

Abstract Rockfall is a hazardous geological phenomenon that threatens human settlements, infrastructure, and natural environments. While rockfall dynamics have been extensively studied, the specific influence of slope height on the coefficient of restitution (CoR) and energy dissipation in controlled laboratory settings remains …

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Study on the Mechanism of Changes in Matric Suction and Shear Strength Mediated by Microstructural Evolution of Loess Under Wetting-Drying Cycles

Chao Liu, Dayang Zulaika Abang Hasbollah, Muhammad Farhan Zolkepli, Fei Sun et autres

Abstract Loess is abundant in sol-based materials and water-absorbing mineral components widely distributed in the world, and its physical and mechanical properties are significantly influenced by the water environment. Under the condition of wetting-drying cycles, the mechanical properties of loess can deteriorate …

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Rare Earth Elements of Sarawak: An Overview

Nurul Syafida Abu Bakar, Dayang Zulaika Abang Hasbollah, Mohamad Fiqry Mohd Latif, Bakhtiar Affandy Othman et autres

Rare earth elements (REEs) are indispensable to permanent magnets, electronics, catalysts and defence systems, but the geological occurrence of REEs does not by itself establish an economically recoverable resource. This review critically evaluates the evidence for REEs in Sarawak, with particular emphasis …

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Improved Settlement Modeling of Leca Column–Raft Systems in Soft Clay: Influence of Friction Angle and Material Properties

Azhani Zukri, Dayang Zulaika Abang Hasbollah, Reza Pahlevi Munirwan

Stone columns are widely recognized as an effective ground improvement technique to enhance the bearing capacity of soft clay, reduce compressibility, and accelerate consolidation by providing drainage for excess pore water. Conventional columns are typically filled with coarse aggregates, but increasing attention …

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A Quick Review of Technical Developments in Indonesian Landslides Early Warning Systems

Vishnu Himanshu Ratnam Pandey, Dayang Zulaika Abang Hasbollah, Bakhtiar Affandy Othman, Ashutosh Kainthola et autres

Increasing demand for infrastructure development, driven by population growth and urbanization, has heightened the risk of landslides, especially in regions with limited land resources. Traditional approaches to landslide hazard estimation and site-specific warning systems often rely on conventional slope stability analyses and …

Numerical Modelling of Carbon Dioxide Plume Dispersion in Sandstone Aquifer of Malay Basin

Izzat Zulfadhli Abd Rahman, Dayang Zulaika Abang Hasbollah, Brenda Leong, Aniza Ibrahim et autres

256.05 million tonnes of carbon dioxide (CO2) have been released into the atmosphere of Malaysia as of 2021. If no steps are done to limit Malaysia's CO2 emissions, it is projected that this scenario could go on for relatively many years to …

Assessment of Supervised Machine Learning Models for their suitability in Flyrock Type Prediction induced by Mine Blasting

G. Padmavathi, Dayang Zulaika Abang Hasbollah, Edy Tonnizam Mohamad, A. Roshni et autres

Blasting is an essential operation in mining and construction for breaking hard rock, but it inherently risks the dangerous phenomenon of flyrock, which can cause injury to personnel and damage to nearby infrastructure. Consequently, the accurate prediction of flyrock type (e.g., fractured, …

Advancements in Ground Improvement Techniques for Soft Soils

M. Husaini, Kaiyuan Gan, Dayang Zulaika Abang Hasbollah, Bakhtiar Affandy Othman et autres

Ground improvement techniques are essential for enhancing the engineering properties of soft soils, which is typically characterized by low shear strength, high compressibility, and poor drainage characteristics. Over the years, several ground improvement methods have been developed and applied to mitigate the …

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Issues and Challenges of Sustainability in Soft Ground Construction

Fatin Hamizah Samni, Dinesh Gunasegar, Dayang Zulaika Abang Hasbollah, Bakhtiar Affandy Othman

Soft ground construction often presents significant challenges, such as low bearing capacity, high compressibility, and a high susceptibility to settlement. These geotechnical issues can lead to instability, costly maintenance, and safety concerns if not addressed appropriately. In recent years, attention has increasingly …

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