涟源含煤区基底构造对盖层构造的控制作用探讨

涟源含煤区（简称本区）发育有北东向和北西向两组基底断裂构造,该基底断裂构造将本区分割成若干微断块,本区盖层构造受基底构造控制明显，不同的盖层构造样式，与由基底断裂所固限的特殊微断块相对应。     

蠕变条件下完整岩石的起裂和扩展准则

The mechanism and criterion of crack initiation and propagation of rocks were investigated by many researchers,And the creep behaviour of rocks was also theoretically and experimentally studied by some scientists and engineers.The characteristics of crack initation and propagation of rocks under creep condition.however,are very improtant for rock engineering and still not paid enough attention by researchers,In this paper,the criterion and mechanism of crack initiation and propagation under creep condition were investigated using specimens collected from sandstone rock formations outcropping in the Emei Mountain,the Sichuan Province of China.Cuboid specimens under three point bending were used in this investigation.All specimens were classified into four sorts and used for Mode-I fracutre of creep frcture tests.The experimental result shows that due to creep deformation.rock crack will inevitably initialt and propagate under a load of KI,which is less than fracture toughness KIC but not less than a constant(marked as KIC2),KIC2 indicates the ability of rock to resist crack initiation and propagation under creep conditions and is less than fracture tough ness KIC.defined as creep fracture toughness in this paper,KIC2 should be considered as an importnat parameter on design and computation of rock engineering.The microstructureal mechanism for crack initiation and propagation of rock materials under creep condition was introduced based on competitive model between softening effect and hardening effect,and the validity of test result was explained.The test result was also verified in rheological theory.When KI is more than KIC2 but less than KIC,rock crack will initiate and propagate after a time interval of sustained loading under creep condition.In order to find the relation between duration of sustained lading.which can lead to crack initiation and propagation,and the initial stress intensity factor KI,an unequal0interval time sequence forecasting and predicting model was introduced,and the relation was obtained for homogeneous and isotropic fine-grained red sandstone.Finally a modified fracture toughness formula was given,in which the influence of fracture process zone(FPZ) was fully considered.     

西方后现代哲学的反辩证法问题

在西方后现代哲学中,反辩证法问题是一个极为突出的方面。西方后现代哲学的思想先驱尼采、阿多尔诺以及主要代表人物德勒兹、德里达、福科、利奥塔、博德里拉都以不同的形式表现了反辩证法的思想。可以说,后现代主义的思想百般花样,之所以始终未能成为一个统一的学派,其主要根源就在于它们绝大多数都是同反辩证法的立场紧密相联的;而西方后现代哲学的这种激进反辩证法倾向的大量出现,与辩证法科学在历史实践中的错误理解与应用导致严重历史悲剧或震荡有直接关系;不可否认,西方后现代哲学的反辩证法的多种思想中也包含着不少有助于进一步发展辩证法科学的要素或材料。     

太行山区地貌与岩性、断裂的关系及开发利用--以林州地区为例

针对林州地区岩性和地质构造基础，分析了与岩性及断裂构造有关的多种地貌类型，论述了地貌与岩性和断裂的关系，以及断裂构造对本区地貌形成与组合起的作用，总结出本区地貌形成是内外力共同作用的结果。最后，提出了因地制宜，合理开发地貌资源的初步设想。     

关于裂尖分枝模型在复合型断裂准则研究中的应用

关于裂尖分枝模型在复合型断裂准则研究中的应用早在１９７３年，Ｈｕｓｓａｉｎ等人提出了分枝裂纹尖端应力场强度的解析解￣［１］．随后，许多人对该解的正确性及合理性提出异议￣［２，３］．文献［４］将该封闭解引入复合型裂纹的断裂准则的研究，从结果看由此准则可...     

论醚键的酸催化断裂反应

文章讨论了醚键的酸催化断裂反应,重点论述了底物的的结构和亲核试剂的改变对亲核取代反应历程以及对生成物结构的影响     

运动创伤性跟腱断裂的功能重建

本文报告运动创伤性跟腱断裂２１例,新鲜损伤１７例,陈旧损伤４例,均行手术治疗,其中１８例经１～５年的随访,优良率为：８８．９％。新鲜损伤的病人疗效满意     

SH3603汽车驱动桥齿轮联接螺栓断裂原因及消除方法

对SH3603（35D）型矿用汽车驱动桥主减速器一、二级从动齿轮的联接螺栓断裂事故进行了疲劳断裂理论分析,找出了根本原因,并提出具体的消除方法。     

鸡西电厂新建工程区域稳定分析与评价

在火力发电厂的可行性研究阶段,应对厂址方案的稳定性作出最终评价。针对本工程较为复杂的工程地质条件,本文从地质条件、地震情况、断裂及构造运动出发,对场址区的区域稳定性做出分析与评价。     

抽油杆断裂原因分析及对策

随着采出程度的提高,油田在开发过程中不断地出现一些新的矛盾和技术难题,诸如抽油杆组合不合理、最大拉应力破坏、偏磨造成抽油杆损坏等使抽油杆断裂;由于油田采出程度较高,含水上升快,腐蚀、结蜡造成的影响、供液不足造成的影响等使抽油杆断裂;这日益成为影响油井正常生产的难题;针对这些矛盾和技术难题,通过深化对管杆分析认识,2007年开展了一系列油杆组合调整、老井措施挖潜和采油新工艺实施,取得了良好开发效果和经济效益。