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Abstract

Full-length bonded bolts are widely used in deep mining engineering and an in-depth understanding of their mechanical characteristics under complex and high ground stress conditions is of great significance for deep roadway support systems. Based on a quantitative GSI rating system of surrounding rocks and rock nonlinear dilatancy angle model, a nonlinear dilatancy angle model suitable for jointed rocks was developed. The Hoek–Brown strain-softening model parameters were transformed into equivalent Mohr–Coulomb strength parameters, and a numerical model of the deep roadway was constructed using FLAC 3�� numerical simulation software as a tool. The force characteristics of fulllength bonded anchors under different constitutive model and dilatancy angle model conditions were analyzed, and the effects of different lengths of anchors on the stability of the surrounding rock were studied. The obtained results revealed a big difference between the axial forces of bolts calculated by strain-softening and ideal elastic-plastic models. It was also found that bolt shear force was less influenced by the strain-softening behaviors of surrounding rocks. Dilatancy angle greatly affected bolt axial force. Therefore, if the dilatancy angle was neglected, great errors would be created in the calculation results of supporting structure designs. The nonlinear dilatancy angle model of jointed rock masses more accurately captured the stress properties of bolts after field monitoring and analysis. The findings of the study can serve as a guide for calculating the stability of surrounding rocks in deep mining engineering.
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Authors and Affiliations

Zenghua Lin
1
ORCID: ORCID

  1. School of Civil Engineering, University of Science and Technology Liaoning, China
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Abstract

While presenting a wide range of cultural, historical and political factors which have influen-ced the Polish and the American reception of Miron Białoszewski’s A Memoir of the Warsaw Uprising, this article tries to assess the role played in its reception abroad by the fact that the original text existed in several versions (censored and uncensored) and, on its way to print, got fitted out with multiple paratexts (introductions, prefaces and afterwords). Interestingly, there seems to be a connection between these fringe texts, the shaping of the translation as shown by choices made by the translators and editors, the evolving model of what is believed to be the right and proper handling of historical traumas, and the politics of remembrance in diverse historical settings and cultural imaginaries. An in-depth analysis of the details of translation and editorship opens up a series of broader questions about the status of a literary text functioning as evidence of traumatic historic events and the mechanisms of its reception by those directly affected (the family circle) and the people outside (with special attention being paid to the tension between the private and the public, and the normative versus the non-normative).
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Authors and Affiliations

Joanna Niżyńska

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