Research on nonlinear damage hardening creep model of soft surrounding rock under the stress of deep coal resources mining

Article Engineering, Geological

Study on very long-term creep tests and nonlinear creep-damage constitutive model of salt rock

Cheng Lyu et al.

Summary: By conducting long-term uniaxial creep tests and introducing a nonlinear damage body, a new nonlinear creep-damage constitutive model was proposed to accurately predict the long-term deformation of salt caverns. The fitting function obtained from experimental data at different times revealed that the presented model best characterizes the creep evolution characteristics of salt rock. The longer the test duration, the more accurate the predicted results for the salt storage caverns.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2021)

添加到收藏夹

Article Energy & Fuels

Effect of mining parameters on surface deformation and coal pillar stability under customized shortwall mining of deep extra-thick coal seams

Shuyin Jiang et al.

Summary: This study introduces a new method for optimizing customized shortwall mining parameters in deep extra-thick coal seams, aiming to achieve maximum coal recovery while ensuring surface deformation and coal pillar stability. Through case study and simulations, the optimal mining scheme with a mining height of 10m, mining width of 100m, and coal pillar width of 122m was determined, achieving a maximum coal recovery rate of 45% with stable coal pillars and acceptable surface deformation.

ENERGY REPORTS (2021)

添加到收藏夹

Article Energy & Fuels

Prediction of cleaned coal yield based on different S-shaped curve models in coal cleaning production

Peng Chen et al.

Summary: This study proposed five S-shaped curve models to predict product yield in coal cleaning process, with experimental results showing significant differences in prediction accuracy among the models. The optimal model GM's prediction performance was validated through industrial test data, demonstrating good accuracy.

ENERGY REPORTS (2021)

添加到收藏夹

Article Mining & Mineral Processing