Secondary development and application of the NP-T creep model based on FLAC3D

被引：15

作者：

Chen, Luwang ^{[1
]}

Li, Shengjie ^{[1
]}

Zhang, Kaixian ^{[1
]}

Liu, Yanxian ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Resources & Environm Engn, 193 Tunxi Rd, Hefei 230009, Anhui, Peoples R China

来源：

ARABIAN JOURNAL OF GEOSCIENCES | 2017年 / 10卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Damage effect; NP-Tcreep model; Secondary development; Parameter inversion; FLAC(3D); DAMAGE CONSTITUTIVE MODEL; ROCK;

D O I：

10.1007/s12517-017-3301-9

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Poynting-Thomson creep model is one of the classical combined creep models; however, it fails to demonstrate the plastic creep and the accelerated creep stage, which limit the popularization and the use of the model. The New Poynting-Thomson (NPT) creep model is established to enhance the existing Poynting-Thomson creep model by the damage theory and the viscoplastic unit in this paper. On the basis of deducing its constitutive equation in three-dimensional finite difference form, The NP-T creep model is secondarily developed by using Visual C++ language and FLAC(3D) built-in FISH language. The results of a parameter inversion indicate the superiority of the NP-T creep model that can be applied in non-uniform stress field. After validating its accuracy by the FLAC(3D) software, the NP-T creep model is used in a numerical simulation to reflect that the roadway stability is gradually weakened with the increase of the surrounding soft rock thickness.

引用

页数：11

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