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| 1 | 尾砂充填料浆流变性能模型与试验研究显示文摘以地下矿山尾砂充填料为研究对象,试验研究与理论分析相结合的方法,利用R/S+流变仪和岩石力学试验机对充填料浆的流变性能进行试验研究.引入Papanastasiou黏塑性流体模型来表征尾砂充填料浆的黏度和切应力变化过程.研究结果表明:该黏塑性流体模型预测的结果和试验结果相吻合,因此可用于理论分析计算;得到不同的压力增长指数下切应力-切变速率曲线;尾砂充填料浆的黏度和屈服应力随料浆质量分数的增加而增大;同一质量分数下,胶结尾砂的黏度和屈服应力比全尾砂大.通过对充填料浆流变性能的研究,为矿山充填设计提供了理论和实验依据. | 蔡嗣经 黄刚 吴迪 张亚东 | 2015 | 东北大学学报(自然科学版)2015，36，6： | 30 |
| 2 | 超细全尾砂胶结充填体的强度特征分析显示文摘以中关铁矿全尾砂为充填骨料、水泥为胶凝材料制作胶结充填体,采用单因素四水平试验设计,分析了全尾砂的物理化学性质,探讨了全尾砂胶结充填体强度与灰砂比、料浆质量浓度和养护龄期之间的定量关系,并对其敏感程度进行了研究。研究结果表明:中关铁矿全尾砂中值粒径仅为14.2μm,碱度系数为2.31,活性系数为2.12,属于碱性超细全尾砂,级配良好、活性较高;全尾砂胶结充填体的强度随灰砂比的增加和料浆质量浓度的增加呈指数函数增长,随养护龄期的增加呈线性增长,拟合相关系数平均值分别为0.97、0.96和0.92;充填体强度对养护龄期的敏感程度最高,灰砂比次之,料浆质量浓度最小。 | 杨磊 邱景平 范凯 李浩 胡世强 | 2017 | 硅酸盐通报2017，36，1： | 18 |
| 3 | Development of a time-dependent energy model to calculate the mining-induced stress over gates and pillars显示文摘Generally, longwall mining-induced stress results from the stress relaxation due to destressed zone that occurs above the mined panel. Knowledge of induced stress is very important for accurate design of adjacent gateroads and intervening pillars which helps to raise the safety and productivity of longwall mining operations. This study presents a novel time-dependent analytical model for determination of the longwall mining-induced stress and investigates the coefficient of stress concentration over adjacent gates and pillars. The model is developed based on the strain energy balance in longwall mining incorporated to a rheological constitutive model of caved materials with time-varying parameters. The study site is the Tabas coal mine of Iran. In the proposed model, height of destressed zone above the mined panel, total longwall mining-induced stress, abutment angle, induced vertical stress, and coefficient of stress concentration over neighboring gates and intervening pillars are calculated. To evaluate the effect of proposed model parameters on the coefficient of stress concentration due to longwall mining, sensitivity analysis is performed based on the field data and experimental constants. Also, the results of the proposed model are compared with those of existing models. The comparative results confirm a good agreement between the proposed model and the in situ measurements. According to the obtained results, it is concluded that the proposed model can be successfully used to calculate the longwall mining-induced stress. Therefore, the optimum design of gate supports and pillar dimensions would be attainable which helps to increase the mining efficiency. | Mohammad Rezaei Mohammad Farouq Hossaini Abbas Majdi | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 6 |
| 4 | 三门峡铝土矿砂岩流变模型的综合辨识方法(英文)显示文摘通过对三门峡铝土矿砂岩进行单轴压缩蠕变实验,获取该类岩石的蠕变实验曲线。通过分析蠕变曲线各应变分量特征,将蠕变总应变细分为瞬时弹性应变ε_(me)、瞬时塑性应变ε_(mp)、黏弹性应变ε_(ce)、黏塑性应变ε_(cp)。根据瞬时塑性应变数据特征,引入新的瞬时塑性原件,定义瞬时塑性模量,建立改进的伯格斯(Burgers)流变模型,完成模型的直接筛选法辨识。根据模型元件力学性质,推导模型在不同应力等级下的一维和三维蠕变方程。采用最小二乘法辨识一维模型各参数,迭代时采用高斯-牛顿法计算,最后拟合实验曲线,验证直接法模型建立的正确性,完成模型后验排除法检验。研究表明,改进的伯格斯模型较好地描述了砂岩流变特征,实现砂岩流变曲线的微观分析,此外,也验证了流变模型综合辨识方法的正确性。 | 张春阳 曹平 蒲成志 刘杰 文丕华 | 2014 | Transactions of Nonferrous Metals Society of China2014，24，6： | 0 |
| 5 | 饱和灰砂岩水-力耦合松弛特性试验研究显示文摘岩石水-力耦合松弛特性是影响硐室围岩工程长期安全稳定的关键因素之一。采用岩石多场耦合三轴试验系统,对饱和灰砂岩在水力耦合条件下的有效围压规律及应力速率依存性开展应力松弛试验,并根据松弛特点选用三单元广义Maxwell松弛本构模型进行数值模拟验证。结果表明:1)水-力耦合条件下饱和砂岩具有非完全衰减松弛特性;2)相同有效围压条件下,无孔压试样的松弛程度略低于有孔压试样,而稳态松弛速率只有有孔压试样的45%左右;3)砂岩水-力耦合松弛具有显著的速率相关性,松弛程度和初始松弛速率均随加载速率升高而增大,最高加载速率试样的初始松弛速率几乎为最低加载速率试样的6倍,而稳态松弛速率没有明显差异;4)三单元广义Maxwell松弛本构模型能较为准确地描述砂岩水-力耦合松弛全过程。 | 冯聪 余健 徐云霞 朱其志 张瑨 | 2021 | 工业建筑2021，51，8： | 0 |
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