基于北斗通信的流动地震观测台站远程监控技术研究     

许卫卫 《地震地磁观测与研究》2015,(3):119-124

实现地震观测台站的远程监控对于保证观测数据质量和提高野外观测效率具有重要意义,目前国内对于高原、沙漠等无有效网络接入的偏远地区的流动地震观测尚无经济有效的远程监控方法。基于我国"北斗"卫星导航系统短报文通信功能,提出并实现适用于国内流动地震观测台站的无盲区远程监控技术。使用结果表明,自主研发的远程监控设备实现了目前流动地震观测的基本需求,通过软件通信协议扩展,也可应用于其他对通信带宽和频度要求不高、具备串口或网口通信功能设备的远程监控领域,具备一定推广性。  相似文献   

A workflow for exploration sampling in regolith-dominated terranes using portable X-ray fluorescence: comparison with laboratory data and a case study   总被引：1，自引：0，他引：1  

M. F. Gazley  L. C. Bonnett  L. A. Fisher  W. Salama  J. H. Price 《Australian Journal of Earth Sciences》2017,64(7):903-917

This paper presents and validates a workflow that provides for the rapid collection of reliable and robust portable X-ray fluorescence (pXRF) data in a regolith-dominated exploration setting. The analysis of regolith material by pXRF is challenging because of its variable Fe content (e.g. 0 to >70 wt%) that results in large matrix effects, which can be mitigated with appropriate standards. Here, we present a dataset from the Western Mount Isa Inlier, Queensland, Australia, comprising soil, lag, rock and rotary air blast (RAB) samples. In the soil dataset, comparison of the laboratory and pXRF datasets for Cu, Pb and Zn have R² > 0.9, and Cu and Zn fall within 2% of the laboratory data, while Pb is 77% less than the corresponding laboratory analyses. Iron, Al, K and Ca by pXRF perform reasonably well when compared with the laboratory data (R² = 0.59 for Al, R² > 0.9 for Fe, K and Ca, <25% variation from the laboratory data), while Mn, Rb and Sr have very good correlations (<8% variation) with R² > 0.94. Titanium, Zr, Ni, Cr and As have poorer comparisons. Overall, the RAB dataset shows similar trends with Cu overestimated by 17%, Zn underestimated by 4% and Pb overestimated by 69%; R² for all elements is >0.92. Since no suitable standards are available, the solid rock dataset was uncorrected; despite this limitation, the dataset shows good correlations with the laboratory data for many elements, and Cu is overestimated by 9.8% with an R² = 0.87. The poor analytical performance of Pb in all datasets is associated with erroneous Bi concentrations being reported by the pXRF unit. When high Fe and Pb amounts are present in a sample, erroneous Pb and Bi concentrations are reported, owing to a pile-up of the Fe K_α peak (6.405 keV) at ～12.8 keV, which is proximal to the Pb L_β (12.614 keV) and Bi L_β (13.023 keV) peaks. Despite the care that is required in validating data, by using pXRF there is substantial opportunity for dynamic exploration campaigns in regolith-dominated terranes with rapid turnaround times, additional elements that may not otherwise be analysed for and low analytical costs. Decisions to stop, continue or infill drill holes while the drill rig is present can be made in near-real time, and not after laboratory results are available and the drill rig has left the area.  相似文献   

黑龙江嫩江县银多金属矿45°斜孔钻探施工技术          下载免费PDF全文

马秀春 《探矿工程》2019,46(8):61-66

在黑龙江省嫩江县二道坎村开展银多金属矿普查工作中使用MP-1000型便携式钻机进行了45°斜孔施工,该钻机占地小,搬迁方便,适合斜孔施工。针对斜孔施工中出现的钻孔漏失、坍塌掉块、钻孔偏斜的问题,通过采用改性刚性水泥堵漏剂对钻孔漏失段进行封堵,取得了良好的封堵效果;选用合适护壁性能的冲洗液减少了钻孔坍塌掉块;为防止孔斜,采用锚杆固定的方式稳固钻机,钻进过程中使用高胎体钻头,减少起下钻次数,避免掉块挤压钻具引起孔斜。通过选择合适的冲洗液以及不断优化施工工艺,45°斜孔施工取得了良好的效果。  相似文献   

CBQ-30A型轻便取样钻机的研制与应用          下载免费PDF全文

朱慧  赵彦军  刘志  李勇前  蔡周 《探矿工程》2019,46(8):89-94

为解决特殊浅覆盖地层取样难题,有针对性地研制了CBQ30A型轻便取样钻机。介绍了CBQ30A型轻便取样钻机的各主要模块结构：轻巧型动力机、闸块式离合器、自主专利换挡机构、简化式水龙头和便拆式传动机构。该款钻机已通过多地生产性验证,基本满足了绿色勘查的需求,对浅层取样钻探技术推广有较好的促进作用。  相似文献   

Can sand dunes be used to study historic storm events?          下载免费PDF全文

Mark D. Bateman  Greg Rushby  Sam Stein  Robert A. Ashurst  David Stevenson  Julie M. Jones  W. Roland Gehrels 《地球表面变化过程与地形》2018,43(4):779-790

Knowing the long‐term frequency of high magnitude storm events that cause coastal inundation is critical for present coastal management, especially in the context of rising sea levels and potentially increasing frequency and severity of storm events. Coastal sand dunes may provide a sedimentary archive of past storm events from which long‐term frequencies of large storms can be reconstructed. This study uses novel portable optically stimulated luminescence (POSL) profiles from coastal dunes to reconstruct the sedimentary archive of storm and surge activity for Norfolk, UK. Application of POSL profiling with supporting luminescence ages and particle size analysis to coastal dunes provides not only information of dunefield evolution but also on past coastal storms. In this study, seven storm events, two major, were identified from the dune archive spanning the last 140 years. These appear to correspond to historical reports of major storm surges. Dunes appear to be only recording (at least at the sampling resolution used here) the highest storm levels that were associated with significant flooding. As such the approach seems to hold promise to obtain a better understanding of the frequency of large storms by extending the dune archive records further back to times when documentation of storm surges was sparse. © 2017 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.  相似文献   

绿色工程勘察钻探实施方案探索及应用          下载免费PDF全文

马映辉  贾宏福 《探矿工程》2020,47(11):29-36

绿色勘察是新发展理念在工程勘察行业的具体体现。钻探作为工程勘察各方法中最直观的手段而不可或缺，与之相关的环境问题也相对较多。通过分析工程勘察钻探特点、可能存在的环境问题，结合实际施工经验，不断探索，提出绿色工程勘察钻探实施方案，并在川藏铁路勘察实践中加以应用。思考与总结当前绿色工程勘察尚需解决的问题。倡导勘察、设计、施工单位和相关部门共同努力构建全方位、完善的绿色工程勘察体系。  相似文献   

近景摄影测量中活动控制系统的设计与实现     

马丽霞  王凤艳  张元元 《世界地质》2013,32(3):612-617

应边坡岩体结构面几何信息测量的需要,设计并制作了一套活动控制系统。经过实验验证,制作的活动控制系统结构稳定,携带方便,控制点成像清晰,活动控制架在室内的控制点点位中误差为 ± 2 mm,在野外环境下控制点点位中误差为± 3. 5 mm。可为近景摄影测量提供快速有效控制,满足近景摄影测量中被测目标测量的精度需要,可作为近景摄影测量获取低矮边坡岩体结构面信息的有效控制。  相似文献   

地震科学探测台阵无线监控技术   总被引：2，自引：0，他引：2  

袁松湧  宋丽莉  杨微 《国际地震动态》2009,(3):12-19

地震科学探测台阵是开展地震学综合研究的大型野外观测系统,可根据观测目的布置在一定区域内进行连续观测。其特点是数量大、分布广,台站工作状况易受外部环境的影响。实际工作中迫切需要掌握流动地震仪的工作状态,而人工巡台工作量大,时效性不能保证。流动地震仪器工作状态的监控对于野外流动观测具有重要意义。我们采用虚拟网络（VPN）技术,通过无线（CDMA／GPRS）通讯方式组成局域网,实现了科学探测台阵总控中心一流动监控中心一观测仪器间的实时通讯,可方便、快速地对大量流动观测台进行实时监控和数据传输,显著提高了远程仪器维护的工作效率,便于提高观测质量。  相似文献   

便携式X射线荧光元素分析仪的应用     

祁昌炜  朱杰勇  王佳音  刘磊 《地质与资源》2013,22(1):64-66

利用NITON XL3t 500型便携式X射线荧光光谱仪,选择云南会泽县金牛厂铅锌矿区进行样品分析条件试验.试验中分别对实验室分析与X射线荧光光谱仪分析结果,以及不同湿度条件下分析结果进行了对比研究,确定了最佳的应用条件.结果表明,实验室分析与X射线荧光光谱仪分析结果相近,但湿度因素会降低元素含量.所以应用便携式X荧光光谱仪进行试验不失为一种方便快捷和行之有效的方法.  相似文献   

利用Satmaster软件优化青海便携卫星站链路设计     

谭颖  杨乐  章静 《地震地磁观测与研究》2012,33(5):322-325

介绍链路设计的基本知识,并以青海便携应急卫星站为例,利用Satmaster软件对该站点的卫星链路进行计算,使之能够在卫星信号覆盖较差的偏远地区进行正常的卫星通信。  相似文献