堰湾2~#隧道地质灾害及防治措施

结合堰湾2#隧道的实际施工情况,分析了石灰岩的岩溶、涌水、突泥等地质灾害产生的机理和原因,提出了预防及治理措施。     

Significance and dynamics of drip water responding to rainfall in four caves of Guizhou, China

In rainy season, NaCI is adopted to trace sources of cave drip water, time scales of drip water responding to precipitation, and processes of water dynamics in four caves of Pearl watershed in Guizhou, China (Liangfeng cave in Libo, Qixing cave in Duyun, Jiangjun cave in Anshun and Xiniu cave in Zhenning). Because of the variety of karst cave surroundings, interconnections of water transporting ways, water dynamics processes etc., time scales of drip-water in four caves responding to rainfall is 0——40 d. According to the characteristics of water transport in cave roof, pathways of water movement, types of water head etc., drip water of four caves can be divided into five hydrodynamics types. The differences of time scales, and ways of water-soil and water-rock interaction during water transporting in cave roof make it difficult to correctly measure speleothem record and trace material sources. In addition, there exist great differences in water dynamic conditions among the four caves. So the interpretation of the paleoenvironment records of speleothem must be supported by the understanding of hydrodynamics conditions of different drip sites. Based on the data got from drip sites in four caves, drip conductivity accords with precipitation, which indicates that element contents in speleothem formed by drip water record the change of karst paleoenvironment. But results of multi-points study are needed to guarantee the correctness of interpretation.     

一类非自治超二次二阶Hamilton系统的周期解

使用局部环绕定理和推广的山路引理，得到了二阶Hanmton系统在满足新的超二次条件下周期解存在的结果．     

河北省太行山区旅游资源特征优势及开发方略

河北省太行山区旅游资源具有分区性和独特性,区位优势和交通优势明显.其开发方略是在深山区建设自然景观区;在浅山丘陵区结合生态工程建设开发人工庄园及农事参与;建设高等级山区公路,着力解决进入景区的瓶颈;强化宣传与信息系统建设,提高景区(点)知名度.     

唐山市地质灾害环境分析和城市规划

地震与岩溶塌陷是影响唐山市城市建设与发展的两大地质灾害。以弹性力学理论为研究基础，运用有限单元法，对唐山市的构造应力场进行了计算与分析。根据计算结果，进行潜在强震危险区预测分析。同时结合岩溶塌陷等地质资料，通过与唐山市城市规划的对比分析，对城市规划和防灾减灾问题做了初步探讨，提出了几点结论和建议。     

济南市南部山区生态环境分析及对策

在分析了济南市南部山区西部区域生态环境现状的基础上，指出该区主要存在植被覆盖率低下、分布不均匀、林地质量差、水土流失严重、水资源短缺、水质恶化、景观破坏等生态问题，并结合当地实际情况提出了改善生态环境的对策，为保护其生态环境提供依据。     

长白山区野生食用菌资源调查

对长白山野生食用菌多次调查，经鉴定和整理出比较重要野生食用菌41种，长自山蕴藏着丰富的真菌资源，极具深入研究与开发价值．     

双液袖阀管注浆法在岩溶地区的应用

某厂设备基础地基多发育溶洞,用双液袖阀管注浆法配合高压悬喷注浆法进行处理,取得了较好的经济效益.介绍了该法的施工方法和应注意的问题.     

鄂尔多斯盆地塔巴庙地区奥陶系风化壳岩溶相特征

鄂尔多斯盆地北部东段塔巴庙地区奥陶系风化壳岩溶作用过甚 ,破坏了地层的连续性及储集性能 ,是导致该区风化壳气藏勘探效果不佳的主要原因之一。根据研究区内钻井岩心及电测资料 ,可从风化壳中鉴别出 6种岩溶相。壳面堆积相为混杂堆积角砾岩 ,分布有限 ,物性很差 ,不可能成为储层或气层 ;洞顶相为镶嵌角砾或微 -粉晶云岩 ,溶蚀缝洞发育 ,是优良的储层或气层 ;洞底相为暗色灰岩 ,局部发育溶蚀缝洞 ,是潜在的储层或气层 ;隔层相为微 -粉晶云岩 ,亦为裂缝 -孔隙性储层或气层 ;坍塌相角砾云岩 ,成分单一 ,物性多变 ,也是一种潜在的储层或气层 ;洞穴充填相主要是泥质角砾岩 ,甚至出现泥岩 ,物性很差 ,难成储层或气层     

云南酵母菌的研究Ⅱ:白马雪山自然保护区的酵母菌

 从云南滇西北德钦县的白马雪山自然保护区的不同基物分离到酵母菌224株,经分类鉴定为8属,其中的裂芽酵母属为我国新记录.文中报道了该地区酵母菌的类群和分布以及优势属.