中原经济区建设与河南高职教育发展方式研究

面对中原经济区建设的现状,河南高职教育也应紧跟时代步伐,切实转变发展方式,坚持重质量、重内涵,增强政府的主导作用、优化专业结构、创新办学模式,实现高职教育的健康、协调、持续发展,从而为中原经济区建设提供强有力的人才支撑。     

Deformation effect of lateral roof roadway in close coal seams after repeated mining

This paper analyzed the deformation mechanism in lateral roof roadway of the Ding Wu-3 roadway which was disturbed by repeated mining of close coal seams Wu-8 and Wu-10 in Pingdingshan No. 1 Mine. To determine the strata disturbance scope, the strata displacement angle was used to calculate the protection pillar width. A numerical model was built considering the field geological conditions. In simulation, the mining stress borderline was defined as the contour where the induced stress is 1.5 times of the original stress. Simulation results show the mining stress borderline of the lateral roadway extended 91.7 m outward after repeated mining. Then the original stress increased, deforming the roadway of interest. This deformation agreed with the in situ observations. Moreover, the strata displacement angle changed due to repeated mining. Therefore, reselection of the displacement angle was required to design the protective pillar width. Since a constant strata displacement angle was used in traditional design, the proposed method was beneficial in field cases.     

内蒙古自治区太仆寺旗伊胡赛金矿区地质特征及外围找矿方向分析

伊胡赛金矿区位于内蒙古自治区太仆寺旗西南部,大地构造位于“华北地台”北缘,天山-兴蒙巨型纬向构造带,是中温热液裂隙充填型金矿床.文章总结了本区的地质特征,并通过对本区矿床类型、矿床成因及控矿因素的综合分析、探讨,指出在该区应以寻找破碎带蚀变岩型金矿为主并指出了在该区及其外围进一步找矿的方向和靶区.     

对提升成都高新西区产业聚群外部规模性的建议

针对成都高新西区的聚群经济仍处在低级阶段,西区企业缺乏核心竞争力,急待升华的现实,建议政府要调整开发区布局,要促成产业聚群经济;要与西区周边各大学互动发展。     

关于住宅坡屋顶的思考

对近几年各城市住宅建设中出现的坡屋顶热进行了分析,认为住宅设计中采用坡屋顶有其客观必然性和现实意义;⑴美化住宅造型,改善城市景观形象;⑵提高住宅屋顶的防水性能,增强住宅商品的耐久性;⑶有较好的保温隔热能力,利于建筑节能;⑷带动新型建材产业的发展。对住宅设计中采用坡屋顶形式、改善住宅整体功能和美化城市形象、实现人居环境的可持续发展等提出4点建议和意见。     

Effect of deteriorated microstructures on stress corrosion cracking of X70 pipeline steel in acidic soil environment

In order to investigate stress corrosion cracking (SCC) of X70 pipeline steel and its weld joint area in acidic soil environ-ment in China, two simulating methods were used: one was to obtain bad microstructures in heat affected zone by annealing at 1300°C for 10 min and then, quenching in water; the other was to get different simulating solutions of acidic soil in Yingtan in south-east China. The SCC susceptibilities of X70 pipeline steel before and after quenching in the simulating solutions were analyzed...     

Investigation of a non-explosive directional roof cutting technology for self-formed roadwayOA

Traditional explosives have characteristics of high risk, large vibration, and poor directional fracturing.Consequently, an instantaneous expander with a single crack surface(IESCS), which is a novel nonexplosive directional rock-breaking technique, has been developed. The directional roof-cutting mechanism of the IESCS method, driven by high-pressure gas, was theoretically analyzed. Laboratory experiments and numerical simulations proved the directional slitting effect of the IESCS method to be...     

碾压混凝土拱坝诱导缝损伤开裂准则研究

混凝土宏观裂缝失稳扩展前 ,裂缝前缘存在较大范围的损伤区 ,使得线弹性断裂判据失效。本文采用虚拟裂缝模型和连续损伤力学方法 ,计算了断裂过程区的长度和损伤度。根据碾压混凝土拱坝诱导缝构造特点 ,分别将诱导缝简化为穿透形裂缝和椭圆形裂缝 ,应用双K断裂准则 ,计算了诱导缝起始扩展和失稳扩展时的等效损伤度和等效应变 ,建立了碾压混凝土拱坝诱导缝的损伤开裂准则     

汶川地震对地震预报工作的一些启示

2008年5月12日四川汶川8.0级地震造成了巨大的人员伤亡和财产损失,认真研究和反思这次地震中所反映的地震预报方面的科学问题,对地震预报科学的发展是十分重要的.本文简要叙述了1966年以来地震预报工作和地震预报研究的进展情况,通过分析汶川8.0级地震的形成机理,对如何认识大型断层长期缓慢积累能量的特征,如何认识这种积...