基于小波变换的钢丝绳检测信号分析

介绍了小波变换的基本概念,利用小波变换的变焦特性和局部化性质对漏磁法钢丝绳检测信号进行了多分辨率分析。结果表明,该方法在奇异信号检测和局部化分析方面具有优异特性,小波变换可以聚焦到信号的细节,适合突变信号的时频分析处理。     

Lifting transform via Savitsky-Golay filter predictor and application of denoising

The Savitsky-Golay filter is a smoothing filter based on polynomial regression. It employs the regression fitting capacity to improve the smoothing results. But Savitsky-Golay filter uses a fix sized window. It has the same shortage of Window Fourier Transform. Wavelet mutiresolution analysis may deal with this problem. In this paper, taking advantage of Savitsky-Golay filter＇s fitting ability and the wavelet transform＇s multiscale analysis ability, we developed a new lifting transform via Savitsky-Golay smoothing filter as the lifting predictor, and then processed the signals comparing with the ordinary Savitsky-Golay smoothing method. We useed the new lifting in noisy heavy sine denoising. The new transform obviously has better denoise ability than ordinary Savitsky-Golay smoothing method. At the same time singular points are perfectly retained in the denoised signal. Singularity analysis, multiscale interpolation, estimation, chemical data smoothing and other potential signal processing utility of this new lifting transform are in prospect.     

深井软岩巷道锚注支护结构承载特性

由于受深部高应力的作用，唐口煤矿埋深达1030 m处于软岩地层中的井底车场硐室和巷道均发生了严重的变形破坏，短期内大部分丧失其安全使用功能.针对此情况，提出了锚喷和锚注支护结构，运用相似材料模型进行了试验研究，得到了巷道在不同支护条件下围岩的变形与稳定规律，揭示了唐口煤矿深井巷道顶底板围岩的变形破坏特征.试验结果表明，锚注联合支护结构能够较好地满足深部高地应力作用要求，为同类巷道的支护提供了有效途径.     

液体黏性软启动装置在大功率长运距强力带式输送机的应用

介绍了液体黏性软启动装置的主要技术指标、结构与工作原理,液压润滑系统工作液体的选择原则,电控系统主要保护的类型与作用等,分析了液体黏性软启动装置在大功率长运距强力带式输送机驱动装置中的应用特点及效果。     

苏嘉杭高速公路软土地基沉降观测作业方法

在高速公路软土地基路段施工过程中,控制地基沉降一直是影响施工进度及施工质量的关键问题之一。通过对苏嘉杭高速公路(江苏南段)软土地基路堤施工沉降动态观测的实践,针对公路软土地基路堤设计与施工技术的有关规定,给出了不同施工期间沉降水准观测的作业方法,并进行了有益的探讨。     

高强度高刚度强力锚固支护体系在深部高应力软岩巷道的应用研究

随着开采深度的不断增加,巷道围岩表现出的高应力软岩特征越来越明显。通过对深井高应力软岩岩石变形特征和机理的研究,提出了采用高阻、让压、强力锚杆锚索一次支护,取代目前新汶矿区普遍采用的多次让压支护的思路,并将该思路成功地应用于千米深井巷道支护中,取得了良好的支护效果。为我国深井软岩巷道支护提供了一条可行的途径。     

“三软”煤层炮采放顶煤工作面顶板控制的实践

通过对“三软”煤层实行炮采放顶煤工艺时,顶板来压规律和顶板事故特征的分析,介绍了对顶板进行有效控制的方法。     

复合地基处理技术研究现状及展望

阐述了复合地基的研究现状,通过对复合地基理论研究的综合述评,论述了各种类型复合地基的标准化情况,分析了复合地基中的一些问题.提出了今后需要开展的研究工作.     

Study on strata control by delay grouting in soft rock roadway

The properties of broken rock before and after grouting reinforcement are studied.Testing results show that grouting can raise the residual strength of broken rock, and the bro-ken rockness by grouting can keep the steady supporting capacity within a relatively large de-formation range. Revealing of the characteristics of stage deformation and damage process comes to the conclusion that the supporting of soft rock roadway should be analyzed in a dy-namic view, and the grouting should be delayed at a proper occasion. Based on the above,the stepwise reinforcement technology characterized by immediate shotcreting, timely bolting and delay grouting is put forward and illustrated with a successful engineering practice.     

K0固结条件对上海软土强度和变形影响的试验研究

本文通过对上海淤泥质粉质粘土和淤泥质粘土,在K_0固结条件下的常规三轴和真三轴排水剪切试验,探讨了K_0固结状态对上海软土强度和变形性能的影响规律,并与各向等压固结三轴排水剪切试验的情况进行了比较和分析。