Samuel Frimpong

• PhD, PEng
• Chair at Missouri University of Science and Technology

Detecting disasters in underground mining, such as explosions and structural damage, has been a persistent challenge over the years. This problem is compounded for first responders, who often have no clear information about the extent or nature of the damage within the mine. The poor-light or even total darkness inside the mines makes rescue effort...

The adoption of connected and automated vehicles (CAVs) has sparked considerable interest across diverse industries, including public transportation, underground mining, and agriculture sectors. However, CAVs' reliance on sensor readings makes them vulnerable to significant threats. Manipulating these readings can compromise CAV network security, p...

In line with the global pursuit of achieving net-zero carbon emissions, integrating carbon capture and storage (CCS) and renewable energy (RE) technologies is important in power production. This study evaluates the profitability of CCS and RE technologies as alternative ways of achieving climate change goals. While past research focused on costs, t...

Potential authors, researchers, and practitioners in surface mining are invited to submit book chapters for the CSIRO Surface Mining Handbook focusing on Surface Mining Systems Design and Engineering. CSIRO (Commonwealth Scientific and Industrial Research Organization) is an Australian Government Agency responsible for scientific research. The book...

Background: The use of fruits and vegetables for the management and treatment of erectile dysfunction has gained popularity due to the cheaper cost, accessibility and perceived absence of side effects. Much of the work done on plant-based aphrodisiacs has focused on the phytochemistry of secondary metabolites. Aim: This work sought to analyze se...

Encouraged by the successful events series on Metals & Mining Industry Energy Transition and Emission Reduction held in Stockholm SE, Future Bridge is launching the North America edition of the event. Join key industry experts on the 19th -20th of January 2023 in Toronto to learn more about their journeys on electrification, decarbonisation and mee...

Haul truck capacities have increased due to their economies of scale in large-scale surface mines. These high-capacity trucks impose dynamic loads on haul roads. A previous study estimated the dynamic forces imposed by ultra-large trucks on haul roads to be more than three times the static load. These dynamic forces exacerbate haul road stresses an...

Blasting generates undesirable ground vibration with adverse effects on humans, the environment, and structures. Numerous studies have used various techniques including machine learning (ML) to predict the peak particle velocity (PPV) caused by blasting in surface mines. These studies used the validation-set approach to evaluate the performance of...

A modern framework for assessing patient histories and conducting clinical research has been developed as the number of clinical narratives evolves. To discover the knowledge from such clinical narratives, clinical entity recognition and relation extraction tasks were performed subsequently in existing approaches, which resulted in error propagatio...

A modern framework for assessing patient histories and conducting clinical research has been developed as the number of clinical narratives evolves. To discover the knowledge from such clinical narratives, clinical entity recognition and relation extraction tasks were performed subsequently in existing approaches, which resulted in error propagatio...

Paracetamol poisoning is the commonest cause of acute liver injury. Therefore, the unethical use of paracetamol as a food tenderizer poses a threat to human health. Although this is a common practice in Ghana, Uganda, Nigeria, and Kenya, there are few or no scientific records on the use of paractemaol as a food tenderizer and its deleterious effect...

Purpose: Hypertension is the biggest single contributing risk factor to global morbidity and mortality burden. Despite worldwide improvement in diagnosis and treatment options for hypertension, poor adherence remains an impediment to improving patients' overall quality of life. This study sought to investigate adherence rates in hypertensive patien...

This study developed machine learning (ML) models for predicting rock formation reactive forces experienced by a hydraulic shovel bucket during excavation. To do this, rock formation in the form of muckpile was modeled as granular ball elements in three-dimensional particle flow code (PFC) using linear bonding logic. A typical field-size hydraulic...

High impact shovel loading operations expose the truck operators to whole body vibrations (WBV), exceeding the ISO exposure limits resulting in long term disabilities and health issues. With dynamic force resulting from the gravity dumping of material during each shovel pass being the main cause for these high frequency shockwaves, this work focuse...

Adansonia digitata L. is a tree indigenous to Ghana and West Africa. It is traditionally used for medicinal, religious and nutritional purposes. Different parts of the plant are used traditionally for the treatment of diseases such as anaemia, malaria, asthma and diarrhoea among others. It is therefore necessary to provide standard parameters for i...

The use of herbal medicinal products for complementary and alternative medicine is well established in Ghana. The potential public health risks associated with the use of these products due to the presence of residual solvents have not yet been investigated and/or reported. In this pilot study, 7 liquid dosage forms of herbal medicinal products obt...

Large capacity shovels are matched with large capacity dump trucks for gaining economic advantage in surface mining operations. These high impact shovel loading operations (HISLO) result in large dynamic impact force at truck bed surface. This impact force generates high-frequency shockwaves which expose the operator to whole body vibrations (WBVs)...

Ethnopharmacological relevance Some local communities in Cote d'Ivoire use the mushroom Termitomyces schimperi combined with kaolin (TSK) to manage various cancers in patients. However, there is a paucity of data on toxicity, mutagenicity and trace metal constituent of TSK. Aim of the study We sought to investigate the acute and sub-chronic toxici...

In surface mining operations, the haul truck contributes the largest share to the overall operating cost, along with being a significant contributor to the injuries and fatalities to the operators; therefore, measures need to be taken for improving truck haulage safety and efficiency. In the absence of any major advancement in the automation techno...

Background: Nymphaea lotus L. (N. lotus) is an aquatic plant with anecdotal reports suggesting its use in the traditional management of cancer. However, there is a paucity of data on the antioxidant, anti-inflammatory and cytotoxic properties of N. lotus in relation to its phytochemical and elemental contents. This study aimed at determining the an...

The stem bark of Khaya senegalensis, known as mahogany is commonly sold on the Ghanaian market for the treatment of numerous ailments. To ensure its safe and efficacious use, there is a need to ensure that this plant material is of the best quality. Quality will involve ensuring its identity, purity and content are up to recommended standards by ap...

Machine learning and artificial intelligence are the two fields of computer science dealing with the innovative idea of inducing smartness and intelligence in machines and automating complex tasks and operations through modern learning algorithms. While the rest of the operational fields have been diligent in developing new technologies, the mining...

Large mining shovels are used to achieve economic bulk production in surface mining operations. The suspended payload for these large capacity mining shovels combined with dipper weight, and harsh digging environment may result in severe stress loading of the shovel front-end assembly. Material flaws, high stresses and harsh operating environment c...

Background and objectives: Hibiscus sabdariffa L. (roselle) sepals, commonly known as bissap is prepared as a cold drink which is widely drunk in Ghana and across West-Africa for their medicinal and nutritional properties. The plant is known to have anti-hypertensive, anti-hyperlipidemic, anticancer, anti-diabetic and anti-inflammatory activities....

Dragline excavators are closed-loop mining manipulators that operate using a rigid multilink framework and rope and rigging system, which constitute its front-end assembly. The arrangements of dragline front-end assembly provide the necessary motion of the dragline bucket within its operating radius. The assembly resembles a five-link closed kinema...

Background: The issue with communication mediums during service provision and for making enquiries to a hospital on the type of services available, availability of physicians and beds at the receiving hospitals, and a reminder system remains a challenge for patients and providers of the health service in sub-Sharan Africa. This present study sought...

Background: The issue with communication mediums during service provision and for making enquiries to a hospital on the type of services available, availability of physicians and beds at the receiving hospitals, and a reminder system remains a challenge for patients and providers of the health service in sub-Sharan Africa. This present study sought...

Haul roads are designed to bear dynamic truckloads generated during haulage. Current road design methods consider static truckloads, which are lower than dynamic loads. They are also unreliable for designing roads for ultra-large trucks. This paper introduces a methodology for designing roads using dynamic loads for any haul truck. A 3D rigid multi...

Background: The issue of mediums to communicate to make enquiries to a hospital in finding out the type of services available, availability of physicians and beds at the receiving hospitals, and a reminder system remains a challenge for patients and providers of the health service in the Sub-Sharan Africa. This present study sought to review the ex...

Large capacity shovels loading dump trucks with material in excess of 100 tons generates large dynamic impact forces results in high frequency shock waves, that in turn generates severe truck vibrations, and exposes the truck operator to significantly high whole body vibration levels and therefore compromises the health and the safety of operators....

For achieving bulk economic excavation, large dump trucks are being used in majority of the earth moving operations resulting in high impact shovel loading operations (HISLO) which exposes the operators to high levels of whole body vibrations (WBV). As the truck ages, hydro-pneumatic suspension struts loses their capability to effectively attenuate...

Ultra-class mining trucks used for material haulage in rugged surface mining terrains experience premature tire fatigue failure in operation. Typical failures include belt edge separation, ply turn-up separation, and tread base and sidewall cracking. The use of reinforcing fillers and processing aids in tire compounds result in the formation of mic...

Trucks experience excitations during haulage due to road roughness, generating dynamic loads. Current mine haul road design techniques assume static tire loads, ignoring dynamic forces. This paper presents mathematical models for estimating tire dynamic forces on haul roads. Models were solved in Simulink® and RStudio® to generate random road profi...

Large capacity dump trucks are being matched with the large capacity shovels in order to obtain bulk production and economic benefits in surface mining operations. This results in high impact shovel loading operations (HISLO) and exposes the operator to severe levels of whole body vibrations (WBV). The performance of the hydro-pneumatic suspension...

Email:liyinglzh@gmail.com. Link:https://www.sciencedirect.com/science/article/pii/B9780081019283000148. Abstract. The hopper-attached belt-wagon (HAB) system is a conceptual design system to be used for oil sands transportation on a surface mine site. The system construction and involved equipment are introduced first. A three-dimensional (3-D)...

When shovels load the dump trucks with over 100-ton passes under gravity dumping conditions, they will create a large impact force on the dump truck body which generates high frequency shock waves which expose the operators to whole body vibrations (WBV). The main cause of such truck vibrations is the large impact force due to the gravity dumping o...

Email:liyinglzh@gmail.com. This book has applied virtual prototype technology to model and simulate cable shovel for system dynamics and structural dynamics analysis in engineering application. A rigid virtual cable shovel prototype is developed in a virtual mining environment for automatic dynamic analysis of shovel mechanical systems. The kinema...

The use of large machinery in surface mining operations has resulted in high-impact shovel loading operations (HISLO). When large capacity shovels dump 100+ tons of loads in a single pass, large impact forces are generated resulting in high frequency shock waves. These shock waves cause severe truck vibrations, and thus, expose dump truck operators...

Mining truck tires are required to support heavy machine loads under rugged terrain and adverse ambient conditions for long operating times. High temperatures resulting from the thermo-viscoelastic coupling mechanism of the rubber materials speed up the fatigue strength reduction processes in dump truck tire. Typical tire fatigue failures include b...

Background: The leaves of Pergularia daemia Forsk (family Asclepidaceae) provide alternative plant-based treatments for the management of diabetes mellitus and diarrhoea in both humans and indigenous poultry species like the Guinea fowls (Numida meleagris). However, no scientific investigations to validate its usefulness in Ghana have been establi...

Electric shovels are used in surface mining operations to achieve economic production capacities. The capital investments and operating costs associated with the shovels deployed in the Athabasca oil sands formation are high due to the abrasive conditions. The shovel crawler shoes interact with sharp and abrasive sand particles, and, thus, are subj...

Excessive heat generation and retention in ultra-large dump truck tires is among the most common causes of tire failures in the surface mining industry. Accurate prediction of an operating tire temperature profile involves the use of advanced numerical models and solution schemes to mimic the complete elastomeric materials response to operating con...

Electric shovels provide an efficient excavation and loading of dump trucks in the surface mining operations. These shovels are characterized by their complex design and operating conditions variability. Effective and safe operations require rigorous simulation of shovel kinematics and dynamics. In this paper, a 3D multi-body kinematic model of the...

Electric and hydraulic shovels are the dominant loading machinery in surface mining operations. Despite their critical role in production and their high capital and operating costs, no reliable and comprehensive quantitative performance metric is available. In this paper, a stochastic shovel effectiveness (SSE) measure is proposed for the purpose o...

Large capacity shovels are deployed in surface mining operations for achieving economic bulk production targets. These shovels use crawler tracks for effective terrain engagement in these environments. Shovel reliability, maintainability, availability and efficiency depend on the service life of the crawler tracks. In rugged and challenging terrain...

The ground articulating pipeline (GAP) system was developed to transport oil sand using a continuous transport system. This paper proposes a simulation-based optimisation approach to improve the efficiency of oil sand continuous transport systems at the operational level. Based on the analysis of shovel capacity, the authors recommend that this GAP...

This paper presents an improved method of mine ventilation network optimization in the form of a standard nonlinear programming problem and discusses how the solution speed and accuracy depends on a weight factor introduced in the objective function term of the Lagrangian function. The nonlinear ventilation network problem is posed as one with only...

Email:liyinglzh@gmail.com. https://www.sciencedirect.com/science/article/pii/B9780081001165000107. A dynamic analysis method is proposed for evaluating the structural strength of large excavators. The method is validated by employing a heavy mining shovel. The front-end is created as a flexible multi-body dynamics system using Lagrange equations...

Material handling in open pit mining accounts for about 50% of production costs. The selection and deployment of efficient, safe, and economic loading and haulage systems is thus critical to the production process. The problems of truck and shovel selection and sizing include determination of the optimal number and capacities of haulage and loading...

Cable shovels are used in surface mining operations to achieve economic bulk production capacities. The service life of the rawlers and their shoes define shovel reliability, maintainability, availability and efficiency. The crawler track-terrain nteraction generates high time-fluctuating contact forces that result in stress buildup, crack and fati...

Compound closed-loop mechanism methodology is proposed to model the wheel loader front-end kinematics for simulating the mechanism motion in a dynamic environment. For the numerical modeling purpose, the mechanism is considered as consisting of three vector loops connected by the joint angles or displacements. Each vector loop is formulated as time...

Heavy mining machinery has exposed the human body to extreme vibrations that may limit the performance of operators and further impact the overall system performance. Large capacity shovels and dump trucks have been deployed in surface mines to achieve economic, bulk production operations. The high-impact shovel loading operation (HISLO) causes sev...

This work presents a new method of mine ventilation network optimisation as standard non-linear programming problem and discusses the use of a novel first-order Lagrangian (FOL) algorithm for equality constraints as a solution tool for these problems. Slack variables have been defined to transform such inequality constraints into their correspondin...

The preparation of graduate talent for the mining industry is a challenging process, given the multifaceted and complex array of decisions mining engineers make in discharging their responsibilities. As leaders, mining engineers must manage operations, lead project teams, mentor junior engineers, chart the technological directions of companies and...

2:e108. doi:10.4172/2168-9806.1000e108

Global crude oil demand is growing at a faster rate than supply. Many conventional oil fields have peaked in the middle of a growing demand across the globe. Oil sands and heavy oil reserves will provide partial solution to this problem in the foreseeable future. Research is thus required to provide answers to difficult and challenging problems ass...

Excavation and loading are primary operations in the surface mine production chain, constituting a significant component of production costs. This makes excavation and loading important cost centers that need to be improved to lower production costs. Optimizing the design and use of excavators will improve energy efficiency in earthmoving operation...

The influence of the ambient temperature on the stress, deformation and temperature of a dump truck tire has been predicted with the virtual tire model established in this work by employing the finite element method (FEM) and Algor software. The nonlinear stress–strain relationship of tire rubber material has been given by Mooney–Rivlin material mo...

A simulator for analyzing the interaction between the oil sand terrain and a pipe wagon articulating (PWA) system has been developed in this paper. An elastic-plastic oil sand model was built based on the finite element analysis (FEA) method and von Mises yield criterion using the Algor mechanical event simulation (MES) software. The three-dimensio...

Advanced research initiatives in the application of automation, robotics and intelligence to solve problems associated with machine-machine, machine-humans, machine-layouts and machine-inanimate objects interactions in surface mining environments to eliminate fatalities.

The use of quality materials (aggregates and asphalt binder) in optimal proportions is the key to producing optimally performing hot mix asphalt (HMA). The Superpave mix design standard in the US introduced specific volumetric and binder property requirements in HMA design. Different methods for HMA constituent proportioning have been proposed in v...

The cable shovel is widely used in surface mining. High operating and ownership costs necessitate efficient use of the cable shovel. Operator practices have long been suspected to contribute towards the inefficient use of the shovel. Crowd arm and hoist rope speeds are key measures of operator practices. The objective of this work is to find the cr...

The shovel-truck system is used in surface mines due to its flexibility, low-cost operations, maintainability and multi-face operating capability. Technological advances have resulted in large shovels and trucks for bulk, economic operations causing high-impact shovel loading operations (HISLO). The resulting HISLO impact forces cause significant v...

Virtual prototype of pipe wagon articulating (PWA) system has been developed and simulated based on the kinematics and dynamics of machinery and Automatic Dynamic Analysis of Mechanical Systems (ADAMS) software. It has been integrated with real-time three dimensional (3-D) system simulations for detailed and responsive interaction with dynamic virt...

Shovel excavation constitutes a significant component of production costs in any surface mining operation. This makes shovel loading an important cost center that needs to be improved to lower production costs. Optimization of tool design will improve energy efficiency in earthmoving operations. However, modeling the soil-tool interaction is a comp...

The coal mining industry is an important sector of Canada's economy. The cost of mining and haulage of coal in Western Canada is a major focal point when compared to inexpensive coal from Australia. Spot coal price volatility affect contractual price arrangements and this creates pressure on companies' profit margins and their competitive edge. In...

Cable shovels are capital-expensive and primary production equipment in many surface mines. The forces acting on the shovel dipper vary as the dipper moves through the muck-pile. The variations in the forces cause stress loading of the components of shovel and dipper resulting in unplanned downtimes, reduced shovel efficiency, and high mining costs...

The deployment of large machinery for low cost, bulk surface mine production operations has resulted in high-impact shovel loading operations (HISLO). In extreme cases, shovels load large dump trucks with 100-ton (or more) passes generating high-impact forces under gravity. HISLO generates high-frequency Shockwaves that cause severe truck vibration...

Design and optimization of pit layouts yield the mineable ore reserves and minimum waste to maximize the net pit value and to ensure optimum location of surface facilities. Many algorithms and their modifications, derived from stripping ratio concepts, displacement of conic volumes, dynamic programming and graph theory, have been developed to desig...

In order to optimize the hydraulic transportation system efficiency and cost in the surface extraction of Athabasca oil sand deposits in Canada, there is a desire to extend the hydraulic transport system to production faces in oil sands mines using mobile train of Flex-Rite-based flexible pipelines. Hydraulic transportation system based on flexible...

Overburden excavation is an integral component of the surface mine production chain. In large mines, the walking dragline is a dominant strip mining machine. Dragline performance depends on the operating speed, the bucket payload, and the machine availability, which could be negatively impacted by the actions taken to increase the machine productiv...

Overburden excavation is an integral component of the surface mine production chain. In large mines, the walking dragline is a dominant strip mining machine. Production engineers and operators must be guided by appropriate strategies to preserve the structural and operating performance of this equipment to justify its high capital investment. The d...

Hybrid Model - Rigid-Flexible Multi-Body Prototyping Virtual Prototyping - Capturing Component Stress Cycle Stress - Model Components Stress and High Stress Areas Reliability - Monitoring Component Stress to Avoid Failure Design Evaluation - Faster and Less Expensive than Making and Testing Standard Physical Prototype