应用微机监测系统随钻识别地层与孔内工况          下载免费PDF全文

鄢泰宁  龚元明 《探矿工程》1996,(5):19-21

钻探微机监测系统可随钻监测和记录９个钻进参数，绘制４～６条回次过程曲线，提示孔内情况，声光报警。在生产现场，操作者可根据显示的提示和曲线等信息，识别孔底地层变化情况，进行见矿预报，保证好的地质效果，该系统还可辅助操作者识别孔内烧钻，钻杆折断，岩心堵塞等异常工况，从而降低事故率，提高钻探效率。  相似文献   

露天矿边坡的位移监测与滑坡预报   总被引：11，自引：0，他引：11  

李炼  陈从新 《岩土力学》1997,18(4):69-74

对湖北大冶铁矿滑坡区域的长期监测资料进行分析和总结，提出依据位移-时间曲线预报滑坡的方法。  相似文献   

试论层序地层学在1∶5万区调工作中的应用—以浑江地区为例   总被引：2，自引：0，他引：2  

周晓东  殷长健  陈跃军 《吉林地质》1997,(2)

通过在吉南浑江地区开展的白山市等三幅１∶５万区调工作，尝试性地运用层序地层学的理论，初步总结了不同特征的不整合面（层序界面）及凝缩段的识别标志；分析了地层序列中矿产分布特征；探讨了层序分析中以剖面岩石（岩性、组构）、相转换界面的基础研究方法。进而将浑江地区新元古代—早古生代地层划分为三个Ⅱ级沉积序列（超层序）、七个Ⅲ级沉积序列（层序）。  相似文献   

露天矿非工作帮移动监测及滑坡规律性讨论     

刘利晓 《中国煤田地质》2004,16(Z1):109-110

根 据 某露 天 煤 矿 非工 作 帮 移 动监 测 的 多 年资 料 ,总 结 出 露 天矿 非 工 作 帮的 监 测 方 法,并 初 步探 讨 了 露 天 矿非 工作 帮 移动 滑坡 的 规律 性。  相似文献   

立井变形监测与治理   总被引：4，自引：0，他引：4  

孟凡森郑庆学  杨中东 《中国煤田地质》2004,16(Z1):59-60

针 对 我国 部 分 统 配煤 矿 立 井 变形 情 况 ,介 绍 了 立井 破 坏 和 变形 两 种 类 型的 原 因 、预 计 方 法 、监 测 方法 及 治 理方 案,对于 立 井的 变形 监 测与 治理 工 作具 有一 定 的借 鉴意 义 。  相似文献   

Correlation of seismic activity and fumarole temperature at the Mt. Merapi volcano (Indonesia) in 2000     

Gudrun Richter  Joachim Wassermann  Martin Zimmer  Matthias Ohrnberger 《Journal of Volcanology and Geothermal Research》2004,135(4):331-342

In this paper we present densely sampled fumarole temperature data, recorded continuously at a high-temperature fumarole of Mt. Merapi volcano (Indonesia). These temperature time series are correlated with continuous records of rainfall and seismic waveform data collected at the Indonesian–German multi-parameter monitoring network. The correlation analysis of fumarole temperature and precipitation data shows a clear influence of tropical rain events on fumarole temperature. In addition, there is some evidence that rainfall may influence seismicity rates, indicating interaction of meteoric water with the volcanic system. Knowledge about such interactions is important, as lava dome instabilities caused by heavy-precipitation events may result in pyroclastic flows. Apart from the strong external influences on fumarole temperature and seismicity rate, which may conceal smaller signals caused by volcanic degassing processes, the analysis of fumarole temperature and seismic data indicates a statistically significant correlation between a certain type of seismic activity and an increase in fumarole temperature. This certain type of seismic activity consists of a seismic cluster of several high-frequency transients and an ultra-long-period signal (<0.002 Hz), which are best observed using a broadband seismometer deployed at a distance of 600 m from the active lava dome. The corresponding change in fumarole temperature starts a few minutes after the ultra-long-period signal and simultaneously with the high-frequency seismic cluster. The change in fumarole temperature, an increase of 5 °C on average, resembles a smoothed step. Fifty-four occurrences of simultaneous high-frequency seismic cluster, ultra-long period signal and increase of fumarole temperature have been identified in the data set from August 2000 to January 2001. The observed signals appear to correspond to degassing processes in the summit region of Mt. Merapi.  相似文献   

Public participation in monitoring programmes as a tool for lakeshore monitoring: the example of Lake Pyhäjärvi, Karelia, Eastern Finland     

Ritta Niinioja  Anna-Liisa Holopainen  Liisa Lepist  Anita Rm  Jouko Turkka 《Limnologica》2004,34(1-2):154

Lake Pyhäjärvi, on the border between Finland and Russia in Karelia, is a very valuable clear-water lake of the Lobelia type. It belongs to the European Union's Natura 2000 programme in Finland, and has been included in regional and national monitoring programmes since the 1960s. The main monitoring station is situated near the outlet of the lake. Deterioration of its water quality was suspected already in the 1980s because of decreasing Secchi depths (transparency) and increasing chlorophyll a.The occurrence of algal blooms on the lakeshores is monitored weekly during each summer at one site on Lake Pyhäjärvi (site 1). This is a part of nationwide intensive algae monitoring programme organised by the environmental authorities together with voluntary observers at some 270 lake sites in Finland since 1998. Since 1997, Secchi depth observations have been carried out by volunteers biweekly or monthly at 17 sites on the lake. In the vicinity of one of these transparency observation sites (station 100), intensive monitoring of algae has been carried out. At this lakeshore monitoring site 69 algal observations were made, ten of which recorded algal blooms during the study period 1998–2002. The observed algal blooms were caused by algae of the Anabaena species, mainly by Anabaena lemmermannii. At Lake Pyhäjärvi the number of algal bloom observations received from the public have decreased from the 1990s to the 2000s. The range of Secchi disc transparency was 5.0–8.4 m with a mean value of 6.2 m at station 100 and 4.3–7.7 m (mean 6.1 m) at the main monitoring station 2 during the open water periods in 1998–2002. During this study period, the maximum values at site 100 seem to have increased slightly, which might indicate some improvement in the water quality due to decreased point source loading.We conclude that the intensive algal monitoring results of 5 years at the lakeshore site and the transparency results — both compiled by trained volunteers — reflect an improvement in the state of Lake Pyhäjärvi in Karelia. This conclusion is in accordance with the long-term water quality and short-core studies of sedimentary diatoms in Lake Pyhäjärvi. We suggest that the intensive algal observations and transparency measurements are both suitable methods for the monitoring of lakeshores and lakes, and that both are suitable for voluntary monitoring. We found public participation a good tool for monitoring lakes and lakeshores.  相似文献   

桥梁气象专题研究与服务   总被引：2，自引：0，他引：2  

刘聪张忠义  黄世成 《气象科技》2004,32(6):399-403

根据实际开展的桥梁气象专题研究，分析桥梁气象研究与服务如何面对国内大型桥梁建设发展趋势所带来的机遇和挑战，提出开展桥梁气象研究与服务的必要性，并从桥位气候背景、桥位气象参数取值、桥梁气象研究方法以及桥梁施工及营运期气象服务与保障等方面介绍桥梁气象专题研究及服务应开展的主要内容，同时，给出一个已投入实际使用的桥梁施工期气象环境监测与预警系统的建设思路。  相似文献   

鹤壁市春旱动态监测及分析     

王军王福州  周官辉郭魁英秦成福  杜滨鹤 《河南气象》2004,(1):17-18

利用鹤壁市淇县1971～2000年降水、底墒、蒸发资料，建立了适用于对春旱进行实时业务监测的动态模型；根据干旱指数大小确定春旱等级，并通过实例对比分析证实干旱指数在分析干旱动态演变过程中的作用。  相似文献   

天目湖热力学状况的监测与分析   总被引：16，自引：0，他引：16       下载免费PDF全文

张运林  陈伟民  杨顶田  黄文钰  江晶 《水科学进展》2004,15(1):61-67

根据2001年6月～2002年5月在天目湖进行的每月一次的全湖水温观测以及2002年5月25～26日在1号点的定点24h连续水温观测资料,分析研究了天目湖水温时空分布、垂直分布、温跃层的形成与变化以及湖泊热力学对溶解氧、营养盐的影响,揭示了各自的基本变化规律。结果表明:天目湖水温的日变化、年变化及垂直分布明显,而其水平差异不大;温跃层随着季节的变化而呈现增强-稳定-减弱-消失的周期变化;水温的变化以及温跃层的存在引起了水中溶解氧以及营养盐的变化。  相似文献