陕西煤炭2025，Vol.44Issue(6)：8-12,5.DOI:10.20120/j.cnki.issn.1671-749x.2025.0602
文家坡煤矿水浸煤体本构方程优化研究
Constitutive equation optimization of water-immersed coal in Wenjiapo Coal Mine
摘要
Abstract
The uniaxial compression test of raw coal samples under different water immersion time[0 d,0.6 d,3 d(saturat-ed),30 d,90 d]was carried out by sampling the No.4 coal seam of the 4104 working face in WenjiapoCoal Mine.The me-chanical characteristic parameters such as peak stress and elastic modulus of coal samples in Wenjiapo Coal Mine under five different water immersion time were obtained,and a damage constitutive model of coal under water immersion was construc-ted.The results show that:Through the test of different water immersion time of 0 d,0.6 d,3 d(saturated),30 d and 90 d,it is confirmed that the uniaxial compressive strength and elastic modulus of coal in Wenjiapo Coal Mine increase with the increase of water immersion time,and the decrease gradually increases.It is confirmed by experiments that the coal body of No.4 coal seam in the 4104 working face of Wenjiapo Coal Mine can reach full saturation after soaking in mine water for 3 days,and the uniaxial compressive strength and elastic modulus of coal samples in full saturation state decrease more than those in non-saturation state.Based on continuous damage mechanics and Weibull statistical damage theory,a damage con-stitutive model of coal considering water immersion-stress is proposed,which can better reflect the influence of different wa-ter immersion time on the mechanical properties of coal.Our research is of great significance to evaluate the stability of Wenjiapo Coal Mine in its life cycle.关键词
文家坡煤矿/损伤因子/水浸作用/本构模型/Weibull分布Key words
Wenjiapo Coal Mine/damage factor/water im-mersion effect/constitutive model/Weibull distribution分类
矿山工程引用本文复制引用
王皓,宋宪峰,高虎,伍珊,朱诗鹏..文家坡煤矿水浸煤体本构方程优化研究[J].陕西煤炭,2025,44(6):8-12,5.基金项目
国家自然科学基金项目(52274226,52304253) （52274226,52304253）
