忻州窑煤矿8913综放面垮架事故分析

文章针对大同矿区两硬条件下综采放顶煤工作面开采过程中发生的垮架事故,根据支架—围岩的相互作用关系,分析了事故发生的原因,提出了实现安全开采的有效技术与管理途径。     

沈阳爱尔创新材料有限公司 技术整合促进高技术陶瓷产品研发

沈阳爱尔创新材料有限公司是一家专业从事精密陶瓷零部件研发、生产与销售的民营高科技企业.公司具有陶瓷新材料、超硬材料精密加工、光通讯微波通讯及电子技术等跨学科的技术整合优势,同时具有现代管理理念和卓越的人才团队.     

软硬段对脂肪族水性聚氨酯的性能影响

合成了一系列脂肪族水性聚氨酯,考察了软段种类和硬段异氰酸酯结构对产物力学性能、耐介质性及热稳定性的影响。     

硬边孔径动态散斑的时空交叉相关特性研究

用统计光学的方法，推导了硬边孔径动态散斑场的时空交叉相关函数，并讨论了散斑的平移规律和“沸滕”现象。Q     

Breakdown of lawsonite subsequent to peak UHP metamorphism in the Dabie terrane and its implication for fluid activity

Abundant occurrences of quartz vein within eclogites in the Dabie-Sulu orogen provide us an opportunity to study metamorphic fluid flow during subduction and exhumation of continental crust. It is, however, usually short of petrological constraints on pressure and temperature of vein formation. This study focuses on kyanite-quartz veins within Iow-T/high-P eclogite in the Dabie terrane that contain unique polycrystalline aggregates, interpreted as pseudomorphs after porphyroblasts of lawsonite. Coesite pseudomorphs were found for the first time in garnet from eclogite, resulting in a revised estimate of peak P-T conditions at 670℃ and 3.3 GPa for the eclogite. This indicates a stability field at graphite/diamond transition, thus upgrading the HP unit to a UHP unit. Neither foliation texture, undulose extinction of quartz nor coesite were observed in quartz veins,although the peak P-T conditions were estimated the same as that in host eclogite in light of thermodynamic calculation based on mineral assemblage in kyanite-quartz veins.Therefore, the formation of the kyanite-quartz veins as wellas the breakdown of lawsonlte into the kyanite-quartz-zoisite assemblage took place during exhumation subsequent to the peak UHP conditions. In this regard, the continental subduction not only brought the water of water-bearing mineral such as lawsonite into the deep mantle, but also released the water from the mineral during exhumation.     

新型纳米晶Fe_(70.5)(CuCrV)_(9.5)Si_(12)B_8软磁合金

已报道的纳米晶软磁合金Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9和Fe_(73.1)Cu_(1.2)Nb_(12.5)Si_(12.5)B_(10)显示出优良的综合软磁性能,特别是在宽频率范围内良好的磁导率频散特性和低的高频铁损可与钴基非晶合金相比,但明显优于高镍超坡莫合金和功率Mn-Zn铁氧体。但是,这两种典型的Fe-Cu-Nb-Si-B合金都含有较昂贵的铌,而且制带较困难。所以,用比铌便宜得多的元素代替铌制成     

罗沙隧道洞口爆破振动研究

以罗沙隧道为研究背景,进行了高地应力下硬岩隧道洞口爆破开挖振动监测试验。对振动数据进行了归一化处理,得到了关于硬岩隧道洞口爆破振动的萨氏经验公式;为爆破开挖设计优化提供了参考价值。在爆破振动速度研究中,爆破振动速度的最大水平径向分量大于最大水平切向分量,最大水平切向分量又大于最大垂直分量,与软岩隧道得到的规律是相反的。达到洞口位置时,爆破振动速度呈现出明显的增加,坡表表面呈现出明显的振动放大效应,这与在软岩隧道中得到的规律是一致的。     

水性形状记忆聚氨酯的合成及其在织物上的应用

聚己内酯二元醇(PCL)为结晶软段,异佛尔酮二异氰酸酯(IPDI)为硬段,合成硬段含量不同的一系列交联型水分散形状记忆聚氨酯(SMPU).通过FTIR、DSC、XRD、透湿性和形状记忆性能测试等,研究了硬段含量对形状记忆聚氨酯(SMPU)结构与性能的影响以及形状记忆聚氨酯在织物涂层上的应用.结果表明:随着硬段含量的提高,聚氨酯的结晶熔融温度升高,结晶度下降,形状回复率先增大再减小.当硬段为28.6%时,形状回复率达到最大为94%.经SMPU处理过的织物随着SMPU硬段含量的增加,透湿量降低;随着温度的升高,透湿量增大.形状回复角较未经处理的织物原样有明显增大.