浅谈岩溶地区隧道施工中的岩溶处理

简要介绍了岩溶的成因，并结合工程实例论述了在隧道开挖施工中对不同的岩溶形态进行处理所采取的措施，结果表明，采用地质分析、钻孔勘探和地质雷达探测相结合是进行地质预测预报的有效手段，加强临时支护是穿越岩溶的安全保证措施。     

沥青质砂岩储层的岩电参数研究

从储层评价角度来看，沥青是占据孔隙空间的一种化学沉淀物。沥青质的存在，会严重影响储层的孔渗特性和地层岩电参数的确定，进而导致测井解释结论出现误差。通过岩电试验，探讨了塔河油田西部志留系因含有沥青质而对物性、电性影响的问题，并按储层分类，给出了沥青质砂岩和非沥青质砂岩的岩电参数，提出了沥青质砂岩的物性校正公式。这些结果已用于实际测井资料的解释评价，为正确识别油气层提供了保障。     

长短锚杆组合加固泥灰岩边坡稳定性的有限差分分析

分析了层状岩体边坡的地质情况,通过有限差分数值建模,建立了边坡长短锚杆复合支护的优化方案,锚杆相间布置,长度分别为16m,12m,倾角为20°,通过计算,边坡加固后处于稳定状态。实践表明：长短锚杆复合支护是边坡加固的有效措施。     

液压支架结构设计与分析系统开发

应用Visual Basic语言开发了综采液压支架结构设计与分析系统,实现了支架全结构模块化设计和几何分析,以及全工况条件下的静力学分析。此外,还介绍了该系统的结构和实现功能,并进行了实例设计。     

A New Approach to Calculate the Mud Density for Wellbore Stability Using the Asymptotic Homogenization Theory

Abstract

This study addresses mud density prediction as part of wellbore stability analyses considering effective rock properties and using friction and elastic theories to determine the deviator stress at failure. The effective rock properties for different sandstone porosities were obtained through the theory of asymptotic homogenization, and the wall vicinity stresses at the borehole wall were estimated considering friction and elastic theories. The use of the method of asymptotic homogenization (MHA) allows obtaining effective rock mechanical properties varying in porosity and saturation conditions.     

十天高速公路软弱围岩隧道快速施工技术

结合十天高速公路隧道工程施工经验,介绍了软弱围岩隧道快速施工技术,具体阐述了隧道开挖模式和钻爆施工方案及其出渣机械配置,并对初期支护方法和各工序交叉衔接施工及作业时间进行了说明,为今后类似隧道施工积累了经验。     

焊缝符号标注及其常见问题浅析

结合相关标准对常用焊缝符号的组成、标注方式及在焊缝基本要素和辅助要素标注过程中经常出现的问题作简要阐述。     

从生态学视角看信息技术在基础教育中的应用

文章从生态学的角度分析了信息技术进入基础教育系统的过程，着重探讨了应该注意的问题，以期引起管理者与教师的思考。     

Excavation cycle times recorded during sinking of a deep shaft in crystalline rock – A case example at Ventilation Shaft of Mizunami URL,Japan

Realistic and properly planned excavation cycle times developed prior to tunnel construction are an important issue for dependable project management, including cost estimation and time saving. Existing design studies, conducted to estimate the total cost for geological disposal, have been limited to estimates of approximate construction total time schedules. There were no case studies which compared the detailed excavation cycle time used in design studies with the actual results from an excavation taking into account each excavation cycle operation and task. In this paper, analyses of actual cycle time recorded during the sinking of the Ventilation Shaft of the Mizunami Underground Research Laboratory and comparison with the planned cycle time developed in the design stage are intended for an evaluation of the baseline work plan and schedule and for optimization of the calculations for application to shaft construction in any future repository in Japan. Actual times to perform three operations, drill and blast, muck removal and concrete lining emplacement were much larger than expected and represent the largest portion of the total excavation cycle time and had the largest impact on the efficiency of the excavation cycles and schedules. Operating at increasingly greater depths and excavating harder, more competent rock combined to significantly affect the shaft sinking speed. The underlying reasons for increases in actual times for the excavation cycle operations compared to their design estimates fall into three categories: constraints on construction; to ensure safety; and maintenance.     

沿空留巷技术的应用

阐述了沿空留巷技术在煤矿回采过程中的施工工艺及留巷支护方式,为煤矿生产提供了很好的经验和方法,保障了煤矿的安全生产和经济效益。