... ABSTRACT Assessing and making decisions in underground mines is crucial and is difficult due to the harsh environment and the limitation of accessibility. Monitoring plays an important role in assessing ground conditions to ensure safety and efficiency. Through consistent monitoring, a safe...

... ABSTRACT Tunnel Boring Machines (TBM) have perhaps become the dominant technique of tunneling worldwide. One of the essential steps to justify using TBMs, planning the completion time, and estimating the cost is evaluating machine performance in given ground conditions. The primary performance...

... conditions. methods. Still, they are either case-specific or overly simplified (Wang et al., 2019). Many researchers have Squeezing ground conditions causes a considerable proposed analytical visco-elastic closed-form solutions convergence of the tunnels that increases for a long time for circular tunnels...

... not be copied. The abstract must contain conspicuous acknowledgement of where and by whom the paper was presented. ABSTRACT: As shallower deposits in many mining jurisdictions are depleted, it is becoming more common to mine in deeper and more challenging ground conditions. This paper provides a discussion...

.... Ground conditions, geological discontinuities, excavation geometry, support design measures and mining methods are fundamental factors influencing FoGs. Despite the advances in underground excavation design, there is still a need for developing tools capable of characterizing ground stability which...

... based on ground conditions. Lastly, practical insights are highlighted with special attention paid to the use of shotcrete in weak ground. ARMA 18-566 Reinforced Shotcrete Performance: Quantifying the Influence of Ground Support Installation Sequence Raffaldi, M.J., Warren, S.N., Martin, L.A...

... ABSTRACT: Sound pillar design and cutting practices maintain the integrity of mining operations. This paper evaluates pillar design and cutting practices in geotechnically poor ground conditions at one of the platinum mines along the Zimbabwean Great Dyke. Both numerical and empirical methods...

... conditions. Rockmass classification techniques used showed that the ground condition where the study was carried out is indeed weak, hence an adequate local support system is required to prevent falls of ground attributable to wedge failure. GPR scans and observations showed that the fallout height thickness...

... TBM tunnel support cost estimation criteria deviation Reservoir Characterization Upstream Oil & Gas PoF assessment ground condition risk management reserves evaluation liner cost estimation construction method iteration probabilistic analysis methodology tunnel support class...

..., including earth pressure balanced (EPB) and slurry pressure balanced (SPB). Real ground conditions are complicated and uncertain. Mixed- face grounds are frequently encountered and create a major engineering challenge during tunneling. Mixed-face ground is defined as the occurrence of two or more subsurface...

... ABSTRACT: Expandable rock bolt, as an efficient ground control product, is widely used in underground mines. However, its capacity and service life are significantly reduced if the metallic body is subjected to corrosion. In some hard rock mines in the US, highly corrosive ground conditions...

... ABSTRACT: Self-drilling hollow core rock bolts anchored with cement grouts have been common practice in underground hard rock mines for high-stress and squeezing ground conditions. While this system has been used for many years, it results in a stiff support system that is unable to yield...

... and passed through four major weakness zones, which are composed of heavily to completely weathered rock mass. drilling operation Reservoir Characterization Fluid Dynamics subsea tunnel Upstream Oil & Gas round length flow in porous media xiang strength ground condition investigation...

... associated with the attributes while rock engineering systems (RES) approach was employed to quantify the interactions between the factors affecting the ground conditions. 24 independent cases were selected to validate the proposed GI by comparing predictions given by the GI with the field observations...

... Abstract: In Carlin Style gold deposits challenging ground conditions can be correlated to the alteration type and intensity as well as ground disturbance (i.e. faulting or collapse breccias). In these conditions, there are significant limitations in the application of conventional rock mass...

...1. INTRODUCTION In underground mines, drill core rigs are commonly used to determine ground conditions in areas of future development and mining. These drill core rigs utilize a fan pattern from which the core is recovered and utilized to generate a 3D model of the undeveloped ground. This process...

... with the footwall of mining excavations and can be subjected to water flows. According to the mine s classification of ground conditions, bad mining ground is encountered in almost a quarter of all working ends but most such conditions are remedied by uniquely prescribed installed support regimes. The mine...

...1. INTRODUCTION The expected ground conditions in Geotechnical Baseline Reports (GBRs) are one of the most important aspects of any tunneling project, as the ground conditions are used to estimate the project schedule, cost, and key components of a contractor tunneling bid: excavation means...

... ground conditions encountered during excavation of the cut, and the actual performance of the critical areas of the cutting. ARMA 13-428 Challenges in Design and Construction of Retaining Walls in Complex Geology Hsi, J.P. Chief Technical Principal Geotechnics, SMEC Australia Hutton, L.D. Principal...

... dilatancy accompanies the process of rock yield and deterioration. For example, squeezing ground conditions are reported in the Taloun tunnel in Iran, the Bolu tunnel in Turkey and tunnel projects in Japan, Venezuela, Germany, Austria, Switzerland, India, Nepal and the USA. A number of parameters...