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贯通测量误差预计多采用规程规定的测量参数,而规程参数多假设在比较理想的环境下,是经过相应理论推导的结果。但是由于各矿井的具体条件不同,在巷道贯通后分析巷道贯通误差,以现用规程规定的误差参数预计的误差与实际差别较大。因此,各矿要根据自己实际情况的不同,进行误差预计参数的确定。本文首先对贯通测量误差参数的类型和重要性进行了综合评述,并对其中地面控制网误差参数和井下控制网误差参数的理论确定方法进行了介绍,用实测资料进行确定。 相似文献
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贯通测量是矿山测量的的一项重要工作。贯通工程质量的好坏,直接关系到整个矿井的建设、生产和经济效益。本文从地面控制网误差、陀螺定向、导入高程、井下控制网误差四个大的方面对贯通测量的误差来源进行了分析,并从贯通测量的各个环节对质量控制技术进行了详细的探讨。 相似文献
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为了直观揭示矿山井下巷道贯通测量精度估算工程和规律,采用全站仪井下巷道贯通导线测量,结合南方CASS9.0绘图软件,摸索出一种全站仪结合CASS9.0绘图软件进行井下巷道贯通测量精度估算试验的方法。提出支导线的终点是支导线精度的最弱点,横向贯通中误差是由全站仪导线测角、测边误差所引起,巷道内高程的控制测量精度直接影响的是竖向贯通中误差;并且通过在某矿山井下贯通测量精度估算工程的试验应用,研究结果表明:该方法达到了预期精度效果,解决了全站仪结合CASS9.0绘图软件进行井下贯通测量精度估算的方法问题。 相似文献
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通过精密导线测量在内蒙古鄂托克前旗某矿+550m水平大巷贯通测量中的应用,详细介绍了使用陀螺定向测量、井下三架法导线测量以及三角高程测量相结合的测量方案,并针对该测量方案做出贯通测量误差预计和精度分析,确保贯通精确安全的进行。 相似文献
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温向卫 《测绘与空间地理信息》2013,(10):235-237
矿井贯通测量是矿山测量中的一项重要工作,为确定井下巷道的掘进方向提供重要依据和保障,必须要保证在贯通点有足够的精度。目前,矿井贯通测量大多采用支导线形式,尤其在较长巷道贯通时很难保证其精度,因此,必要时需在导线上加测一定数量的陀螺定向坚强边,将支导线分为若干条方向附合导线,检查井下导线测角的正确性,同时提高井下导线测量的精度。而误差预计是在根据设计的容许要求制定施测方案时,根据施测方案确定的施测方法、使用仪器自身精度在施测前预计方案在施测过程中实际偏差可能达到的程度,将估算的预计误差与设计的容许误差进行比较,选择符合设计要求的、合理的测量方案和方法,指导测量施工。本文以实例就井下导线测量加测陀螺定向坚强边后的误差预计的计算方法作以探讨。 相似文献
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矿井联系测量是矿山测量中的一项重要工作,一井几何定向是矿井平面联系测量最常采用的方法,主要目的是为矿井上、下建立统一的测量平面坐标系统,为相邻矿井间各种巷道的贯通提供重要依据,为矿建工作提供基础保障.现以实例就矿井联系测量一井几何定向最常用的连接三角形法作以介绍,重点阐述了一井几何定向外业施测、定向投点、连接测量及连接三角形的计算方法,最后并根据工作经验总结出一些提高一井几何定向精度应注意的事项,供大家参考. 相似文献
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《测绘与空间地理信息》2020,(6)
贯通测量对于加快矿井、隧道等地下工程建设,改善地下通风和工作环境具有重要意义。本文结合某煤矿风井与副井间贯通测量的工程实践,系统地阐述了立井精密贯通的工作流程,包括测量方案设计、立井联系测量、井下控制测量,为矿山立井高精度贯通提供了可靠的设计和实施方案。 相似文献
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采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
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Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw. 相似文献
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Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
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ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
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GNSS系统及其技术的发展研究 总被引：3，自引：1，他引：2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
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“4D”技术及其应用 总被引：13，自引：0，他引：13
介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
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《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献
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Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献
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地理数据库的关系模型及其实现 总被引：1，自引：0，他引：1
本文从以图论观点分析地理实体入手,系统阐述了地理数据库关系模型的设计法和过程。作者于1984年4～9月间在微型机上设计建立了关系型地理数据库的实方验系统(RGDB)。该系统采用了本文提出的关系模型,采用了可动态扩库的子库组合结构,这种结构具有灵活性和提高空间利用率的优点。RGDB含有多种功能的数据操作命令,除了具有一般检索功能外,还能进行“开窗”选取和十分“自由”的映象选取。本文对RGDB系统的主要性能和实现途径作了扼要介绍。 相似文献