Zhongshan Daxue xuebao. Yixue kexue ban, 2009 【目的】 探讨氧控制性再灌注(OCR)对体外循环肺缺血再灌注(I/R)早期损伤的作用65377; 【方法】 14只健康犬随机分为对照组(I/R,n = 7)和实验组(OCR, n = 7)65377;对照组全程FiO2 80%;实验组在主动脉开放即刻调整FiO2至40%,随后每5 min依次上调10%,最后达80%,其余时段均维持FiO2 80%65377;检测动脉血气,观察两组犬在麻醉后65380;主动脉开放前65380;开放后565380;1065380;1565380;2065380;25 ...
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Development and prospect of freezing shaft lining technology for vertical mine shafts in China [PDF]
This paper delves into the formidable challenges posed by the trends of “deepening” and “scaling up” in the design, construction, and operation of deep mine shafts in China.
Chi ZHANG +10 more
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Seepage control effect and sensitivity analysis of anti-seepage measures for sand-mudstone interbedded foundation [PDF]
Sand-mudstone interbedded frock mass presents a typical complex geological condition, with a highly intricate seepage field distribution. Traditional seepage control analysis methods are difficult to accurately describe the behavior of the seepage field.
Chen ZHANG +5 more
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Current situation and scientific challenge of soil and water erosion in Gully Consolidation and Highland Protection Project of DongZhi Loess Plateau [PDF]
Due to the influence of extreme rainfall and high intensity human engineering activities, the advance speed of the gully head in the Loess Tableland is intensified, which seriously threatens the economic and social development of the Loess Tableland.
Buping ZHANG +5 more
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Shuitu Baochi Xuebao[目的] 为探究根土复合体的力学效应机理及模型方法应用。[方法] 采用文献分析和对比分析法,归纳分析根土复合体概念和内涵、根土复合体力学效应及力学模型原理、优缺点以及适用范围。[结果] (1)根土复合体是根系与土体之间力学耦合效应的复合整体,根系在土体中交叉缠绕,起到加固作用;(2)根系与土体力学关系实质上是根土复合体土力、水力和复合力学特性作用的结果,土力特性、水力特性分别侧重研究根系对土体的影响和土中水分对土体和根系的影响,复合力学特性侧重于根土复合体自身特性对植物根系特征以及结构的直接影响 ...
谢祥荣 +8 more
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Stability analysis of the surrounding rock of underground water-sealed oil storage caverns based on microseismic monitoring during construction [PDF]
, 2016 采用加拿大ESG 微震监测系统对锦州某大型地下水封石油洞库局部开挖过程进行实时监测和分析,圈定监测范围内围岩潜在危险区域,再现开挖过程中洞库失稳区域的岩体微破裂萌生、发展和集聚。结果表明:(1)采用人工定点敲击试验对监测系统定位性能进行测试,确定研究区域岩体整体等效P 波波速为5 200 m/s,传感器阵列范围内的震源定位误差小于8 m;(2)监测区域岩体微破裂呈2个条带状聚集,一条位于水幕巷道6东侧,水幕巷道1和2范围,与水平面呈缓倾角。另一条位于储油洞室1北与1南范围2+40~2+60里程区域内 ...
吴疆 +5 more
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Influence of gas environment on the fracture healing and repair mechanism of self-healing sealing materials [PDF]
Grouting sealing is the most commonly used sealing measure of extraction borehole. Under the influence of stress disturbance, the cracks sealed by grouting are easy to crack and form secondary air leakage channels.
Banghua YAO +6 more
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Research progress of microbial reinforcement technology [PDF]
Biological reinforcement is a new branch that has developed in the field of engineering geology in recent years, among which, the microbially induced calcium carbonate precipitation (MICP) reinforcement technology is an effective method.
Long XU +5 more
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Protective mechanism of weathering steel rust layers in atmospheric environments and their stabilization treatment technologies [PDF]
Corrosion is a major cause of steel degradation, leading to material thinning, perforation, stress concentration, and ultimately deterioration of mechanical properties that can result in engineering structure failures.
Baorong HOU +5 more
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Research progress on dynamic response of deep rocks under coupled hydraulic-mechanical loading [PDF]
Deep rock is under a complex geological environment with high geo-stress, high osmotic pressure, and strong dynamic disturbance, under the action of the three, the rock body is more prone to damage and rupture, inducing sudden water surges, seepage ...
Bangbiao WU +4 more
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