Parallel personal measurements of diesel engine exhaust and crystalline silica using dual sampling port

Fleck, Alan da Silveira; Couture, Carol; Cabelguen, Virginie; Ryan, P. E.; Thuot, Ross; Lachapelle, Guillaume; Coulombe, Hugo; Debia, Maximilien

doi:10.1016/j.ijmst.2020.04.004

Cited by 1 publication

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“…Consequently, the proportional relationship of the stress components varies with the loading. erefore, the traditional constitutive equation of the plastic stage, i.e., (1), can be generalized and applied by using Henck's total strain theory in plastic mechanics [30,31]. e relationship between the equivalent stress and equivalent strain of the rock mass under complex stress states can be obtained as follows:…”

Section: Analysis Of Stress and Displacement Of Surrounding Rock In Plasticmentioning

confidence: 99%

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

Cheng

Chen

et al. 2021

Shock and Vibration

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In deep roadway mining, high water pressure causes rock mass cracking and weakens the overall strength, affecting the stability of underground metal mine mining roadways. Therefore, using a numerical simulation method, we analyzed the strain softening characteristics of rocks after the inflexion point of elasticity and studied the strain distribution and the minimum support resistance under high-pressure groundwater conditions. Considering the groundwater pressure and effective porosity on the strain softening characteristics of the surrounding rocks, we investigated the critical groundwater pressure under which the surrounding rocks would remain stable. Actual engineering verification helps to obtain the supporting characteristic curves under different influencing factors. We found that water pressure and effective porosity are the significant factors that decide the development scope of the plastic zone. The more significant the increase of the plastic zone, the more notable the changes in the support curve. Moreover, the plastic zone is likely to occur when the hydraulic head is between 30 and 50 m; when the hydraulic head exceeds 50 m, it is likely to produce a relaxation zone.

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Section: Analysis Of Stress and Displacement Of Surrounding Rock In Plasticmentioning

confidence: 99%

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

Cheng

Chen

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

Parallel personal measurements of diesel engine exhaust and crystalline silica using dual sampling port

Cited by 1 publication

References 5 publications

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

Numerical Simulation of Cracking Failure and Weakening Law of Roadway Surrounding Rock under High Stress

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