Numerical simulation on coupling method between mining-induced stress and goaf compression

被引：0
|
作者：
Jiang L. [1 ,2 ]
Wu Q. [2 ]
Li X. [2 ]
Ding N. [2 ]
机构：
[1] State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao
[2] College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao
来源：
| 1951年 / China Coal Society卷 / 42期
关键词：
Caved zone compression; Coupling analysis; Fractured zone weakening; Mining-induced stress; Numerical simulation;
D O I：
10.13225/j.cnki.jccs.2016.1717
中图分类号：
学科分类号：
摘要：
The goaf stress recovery under the effect of overlying strata subsidence has notable effect on mining-induced stress field.Based on the coupling effect between ground stress and goaf compression, the mechanical characteristics and properties back-analysis method of caved rock are studied, the tension-weakening characteristics of rock mass in fractured zone are analyzed, and hereby the coupling simulation method between mining-induced stress and goaf compression is proposed and verified using a simulation case study.The results show that the mechanical behavior of the compressed caved zone follows an exponential growth, the compression stiffness nonlinearly increases with the compression strain.The mechanical properties of caved zone obtained from back-analysis agree with the analytical results, which contribute to the simulation of the mechanical behavior of goaf.The tension-weakening model, which is developed from strain-softening model by adding the tension-weakening algorithm, can describe the weakening of Young's modulus, hereby achieve to describe the mechanical behavior of fractured rock mass rigorously.Based on the mechanical behavior simulation of caved and fractured zone, the proposed method can conduct the coupling numerical simulation of mining-induced stress field and the overlying “two-zone”. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：1951 / 1959
页数：8
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