Simulating the Failure Mechanism of High-Slope Angles Under Rainfall-Mining Coupling Using MatDEM

Water, Journal Year: 2025, Volume and Issue: 17(3), P. 414 - 414

Published: Feb. 2, 2025

The safety production of gold, silver, copper, and other important metals is seriously threatened in the process mining from open-pit to underground due various factors such as infiltration caused by rainfall unloading during mining. Furthermore, current situation an increasing number mines presents a high steep terrain, which poses significant security risks. Accordingly, it great practical significance investigate failure mechanism high-slope angles ensure long-term safe mines, considering excavation unloading. In this study, slope (45°, 55°, 65°) under rainfall-mining coupling was analyzed using discrete element MatDEM numerical simulation software. Herein, stress distribution, characteristics, energy conversion model were simulated different analyze at each stage. results show that damage scale smallest 55° largest 65°. This indicates setting angle can reduce risk instability. Moreover, reduction elastic potential mine room stage similar mechanical energy. During pillar stage, concentrated goaf, resulting greater compared Finally, after completion continuous becomes area, effect on evident complete collapse model.

Language: Английский

Study on Shear Creep Characteristics of Carbonaceous Mud Shale at Different Moisture Contents Under Temperature Cycling

Water, Journal Year: 2025, Volume and Issue: 17(4), P. 567 - 567

Published: Feb. 15, 2025

Mine slope landslides can lead to significant geological disasters. To investigate the impact of temperature cycling on internal mechanisms that trigger these disasters in weak interlayers with varying moisture contents, a THMC-B multi-field coupled simulation device was employed conduct shear creep tests carbonaceous mud shale contents across 16 cycles (ranging from −5 °C 65 °C). Based observed characteristics and related patterns, rheological constitutive model for established characterize damage effects at different during cycling. The experimental results indicate following: under conditions, an increase content rapidly reduces mechanical properties shale, rendering it more susceptible shearing same failure stress level consequently shortening overall time; higher prolongs duration deceleration stage shale; improved accurately represents entire process fitting coefficients exceeding 0.95. These research findings provide certain references insights study mine slopes.

Language: Английский

Study on the Impact of Seepage Filtration Under Wet–Dry Cycles on the Stability of Mudstone Limestone Slopes

Water, Journal Year: 2025, Volume and Issue: 17(4), P. 592 - 592

Published: Feb. 18, 2025

Open-pit mining often exposes weak rock layers, the strength of which significantly affects stability slopes. If these layers are also prone to disintegration and expansion, cyclic rainfall can exacerbate instability. Rainfall-induced changes in seepage field indirectly threaten Therefore, investigating characteristics mudstone limestone impact on slope instability under different wet–dry cycles is great significance for safe open-pit mines. This paper takes a certain mine southwest as starting point conducts experiments saturated density, water absorption rate, permeability coefficient, compressive strength, variable angle shear strength. Combined with scanning electron microscopy phase analysis X-ray diffraction analysis, macroscopic microscopic samples comprehensively analyzed. FLAC3D software used explore mechanism Our research found that preparation samples, particle size less than 1 mm drying temperature 50 °C optimal, specific values initial natural content. As number increases, density increases; rate first rises sharply then slowly; coefficient stabilizes, finally dropping sharply; decreases slowly, internal friction little; frequent lead mudification filtration. At level, pores become larger more regular, distribution concentrated; mineral content weaken numerical simulation, at bottom exceed those surface top, transient area expands, overall local coefficients gradually decrease. During third cycle, lower stability, landslide trend shifts. In conclusion, change content, affecting physical mechanical properties, leading deterioration area, decrease matrix suction, an increase gravity, eventually causing

Language: Английский