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The existence of joints poses a challenge to the dynamic stability of underground caverns. To investigate the dynamic response of the underground cavern affected by an unexposed joint, a series of SHPB tests were conducted on the marble specimens with a cavern and differently distributed joint, including the cases of joint location dips of 0°, 56°, 90°, 134°, …
Underground coal mining often causes subsidence, goaf landslides, fissures, and even hazard chains, seriously damaging the ecological environment. To address the ecological vulnerability of mining areas is key to exploring the development characteristics and failure mechanisms of surface multi-hazards. Taking the Shuiliandong coal mine as an example, the …
The Southern African Institute of Mining and Metallurgy Narrow Vein and Reef 2008 Bruce Vorster and Douggie Franklin Page 1 IMMEDIATE GROUND SUPPORT, AFTER DEVELOPMENT OR STOPE ... dykes and slips. A joint is a natural discontinuity which basically cuts the roof beam into two separate pieces, allowing it to cantilever. A fault is a joint where ...
mining (23.5 per 100,000 workers). Mining was followed by agriculture, forestry and fishing (22.7); construction (12.2); and transportation and public utilities (11.3). Within the underground mining sector, falls of ground comprised about 28 percent of the fatal and 16 percent of the lost-workday injuries from
in Underground Hard Rock Mining M. N. Bagde CSIR-Central Institute of Mining and Fuel Research, Nagpur Research Center, ... rest of the industries like steel making, power generation, infrastructure and automotive sector etc. In a given circumstances and a global competitive market, obviously there is a big pressure on the ... Slips/joints ...
When mining near the fault can cause the fault to slip and release energy, resulting in rockburst and posing a significant safety risk to coal mine production. This paper proposes a numerical simulation method, based on FLAC3D numerical simulation, for calculating the dynamic response of fault slip below the impact of mining. The release patterns of energy …
Sensitivity analysis should be conducted to investigate the effect of geometrical properties of rock joints (e.g., stiffness, roughness, friction, dip direction, interconnectivity, joint spacing, distance between joints and excavation, etc.) and rock mass properties (e.g., friction, cohesion, deformation modulus) on the stability of underground ...
dif fer ent geological discontinuities such as faults, folds, slips, joints, etc. Fault is one of the major geological discontinuities which cr eates lot of dif ficulties during undergr ound winning of coal. Entir e str ess regime and gr ound conditions in the formation ar e alter ed in and around the faults. Faults also impose detrimental ...
Division of Mining and Geotechnical Engineering, Luleå University of Technology, 97187 Luleå, Sweden. Corresponding author: Xu Ma ([email protected]) Keywords: Shear slip behavior; unstable failure; mining-induced seismicity; continuously yielding joint model; DEM Highlights: • Estimate unstable slip fault-slip potential of discontinuities
@article{Das2017EvaluationOS, title={Evaluation of stability of underground workings for exploitation of an inclined coal seam by the ubiquitous joint model}, author={Arka Jyoti Das and Prabhat Kumar Mandal and Rana Bhattacharjee and Sachin Tiwari and A. Kushwaha and Lal Babu Roy}, journal={International Journal of Rock Mechanics and Mining ...
Understanding and preventing slips, trips, and falls is crucial in mining to prevent injuries and fatalities. Mining operations can create various hazards such as uneven surfaces, slippery floors, and obstructions, and implementing measures such as regular maintenance, good housekeeping, and proper footwear can help reduce the risk of these types of accidents.
DOI: 10.1016/jcom.2019.11.040 Corpus ID: 211080470; Mathematical modeling and fuzzy approach for disaster analysis on geo-spatial rock mass in open-pit mining @article{Deng2020MathematicalMA, title={Mathematical modeling and fuzzy approach for disaster analysis on geo-spatial rock mass in open-pit mining}, author={Zhigang Deng and …
About one quarter of the coal produced in Australia is by underground mining methods. The most commonly used underground coal mining methods in Australia are longwall, and room and pillar. This paper …
Perturbations arising from mining operations significantly affect the stability of rock masses, and the influences aggerates with the rapid increase of mining-operation depths …
Cleats & Joints. Fracturing is the basic element of tectonic disturbance. The process of folding gives rise to fracturing in beds. Cleats are natural fractures in coal. Methane and other coal seam gases will flow out of pores of coal if there is a pressure gradient acting as a driving force and the fractures are sufficiently open or permeable ...
Underground mining has historically occurred in surface and near-surface (shallow) mineral deposits. While no universal definition of deep underground mining exists, humanity's need for non-renewable natural resources has inevitably pushed the boundaries of possibility in terms of environmental and technological constraints.
Fault-slip induced rockbursts can cause large deformation and serious damage to underground drifts, equipment destruction and casualties (Wang et al., 2022; He et al., 2023). …
Fault-slip induced by underground longwall mining could trigger dynamic failure to nearby mine openings. ... slips, joints, etc. Fault is one of the major geological discontinuities which creates ...
the slip burst, a comparison of instability between different geometries of discontinuities can provide a reference to underground mining. The goal of this study was focused on …
Roof bolt reinforcement of stratified carboniferous and fragile strata is a popular way of roof support in underground mines. The manifestation of strain energy of strata generated during coal winning generates convergence on established highways, the magnitude of which is exclusively determined by the strength, manner of beam construction, and time. A …
Abstract The use of joint properties and joint mapping techniques are key for fall of ground management in underground mining. This paper outlines the use of probabilistic design approach in addressing potential falls of ground, based on identi-fied keyblocks. A shallow chrome mine was used as a case study to identify potential causes of falls ...
Protecting the health and safety of the workers is a major consideration in properly conducted mining operations and, in most countries, is required by laws and regulations. The Underground Mine. The underground mine is a factory located in the bedrock inside the earth in which miners work to recover minerals hidden in the rock mass.
slips, joints, cleat and conducting different studies like lithological characteristics of ... 2.1 Detailed Underground Mapping Underground mining in general is hazardous venture, as it …
Shear Slip Using DEM at an Underground Mine Xu Ma1 and Ping Zhang2 Abstract Geological structures and discontinuities subjected to the perturbations posed by mining operations in underground mining can be re-activated and cause fault-slip rockbursts. This study investigates geomechanical stability in terms of shear slip
Abstract The ore dilution is generally defined as the degradation of economical and valuable ore with the addition of the unwanted host rock, failed backfilled material and or ore material considered below the cut-off the grade. The importance of ore dilution on the profitability of a mining operation is very well known and also well documented, since, it adds to the cost …
dismounting of equipment, make miners vulnerable to slips and falls. Miners sometimes have to hand-carry heavy objects. This can lead to reduced visibility and awkward body positions which can cause slips and falls. Snow, ice, and freezing rain make surfaces very slippery. Wear shoes or boots with non-slip soles. Be careful while walking.
Introduction. Fault-slip rockbursts are sudden and violent rock failure in underground excavations in mining and civil engineering. They are generally caused by sudden slippage along a fault or a shear rupture which releases a large amount of elastic energy that is stored in the surrounding rock masses (Kaiser and Cai, 2012).
Abstract In underground near-fault mining, fault reactivation is related to many kinds of mine disasters such as mine water inrush, mine earthquakes, gas outburst, rock burst, …
The rock mass around an excavation is generally traversed by different geological discontinuities such as faults, folds, slips, joints, etc. Fault is one of the major geological …
requisite for safe design of the underground mining structur es. In this paper, a study has been carried out to assess the effect of the ... geological discontinuities such as faults, folds, slips, …
