基于ＢＤＳ－ＭＲ的海平面测高技术

利用ＭＡＹＧ站ＢＤＳ和ＧＰＳ的Ｌ１载波高度角小于２０°的ＳＮＲ数据对海平面高度进行反演,并与验潮站实测海平面高度作对比分析,得到在２０１６年年积日第１９６天的ＢＤＳ反演结果与验潮站实测海平面高度的ＭＡＥ优于８ｃｍ;ＢＤＳ在２０１６年第１９１～１９６天的反演结果的ＲＭＳＥ为０.３５７;ＢＤＳ、ＧＰＳ联合反演结果与验潮站实测海平面高度ＲＭＳＥ达到０.２８６,相关系数优于０.８５６,ＢＤＳ能较好实现实时、连续监测海平面高度的变化,ＢＤＳ与ＧＰＳ联合监测海平面高度提升了监测分辨率和精度,ＢＤＳ－ＭＲ进一步拓展了ＧＮＳＳ在海洋遥感领域监测的能力。     

FRICTION AND WEAR BEHAVIOUR OF SINTERED BRASS

ＦＲＩＣＴＩＯＮＡＮＤＷＥＡＲＢＥＨＡＶＩＯＵＲＯＦＳＩＮＴＥＲＥＤＢＲＡＳＳＦＲＩＣＴＩＯＮＡＮＤＷＥＡＲＢＥＨＡＶＩＯＵＲＯＦＳＩＮＴＥＲＥＤＢＲＡＳＳ￥ＬｉＸｉｂｉｎ；ＴａｎＬｉｎｙｉｎｇ；ＳｕＣｈｕｎｍｉｎｇ；ＬｉＭｅｉｙｉｎｇ（Ｐｏｗｄｅｒ...     

编译dBASEⅢ使用FOXBASE^＋数据库的两种方法

目前，同一企业中ｄＢＡＳＥⅢ和ＦＯＸＢＡＤＳＥ＾＋共存的现象十分普遍，因而我们为您提供两种在编译ｄＢＡＳＥⅢ的情况下使用ＦＯＸＢＡＳＥ＾＋数据库的有效方法。     

FHA BIOCERAMIC COMPOSITE MATERIALS ENHANCED BY ZrO_2

ＦＨＡＢＩＯＣＥＲＡＭＩＣＣＯＭＰＯＳＩＴＥＭＡＴＥＲＩＡＬＳＥＮＨＡＮＣＥＤＢＹＺｒＯ＿２ＦＨＡＢＩＯＣＥＲＡＭＩＣＣＯＭＰＯＳＩＴＥＭＡＴＥＲＩＡＬＳＥＮＨＡＮＣＥＤＢＹＺｒＯ＿２￥ＲｕａｎＪｉａｎｍｉｎ；ＨｕａｎｇＢａｉｙｕｎ（ＰｏｗｄｅｒＭｅ...     

ENTITY-ROLES MODEL AND OBJECT-ORIENTED KNOWLEDGE/DATA BASES

ＥＮＴＩＴＹ－ＲＯＬＥＳＭＯＤＥＬＡＮＤＯＢＪＥＣＴ－ＯＲＩＥＮＴＥＤＫＮＯＷＬＥＤＧＥ／ＤＡＴＡＢＡＳＥＳＥＮＴＩＴＹ－ＲＯＬＥＳＭＯＤＥＬＡＮＤＯＢＪＥＣＴ－ＯＲＩＥＮＴＥＤＫＮＯＷＬＥＤＧＥ／ＤＡＴＡＢＡＳＥＳ￥ＰａｎＪｉｕｈｕｉ；ＬｉｕＺｈｉ...     

SYBASE系统参数的调整与系统性能

随着ＳＹＢＡＳＥ数据库越来越广泛的应用，怎样用和怎样用好ＳＹＢＡＳＥ数据库显得越来越重要。本文对ＳＹＢＡＳＥ数据库的系统参数及性能作一简单的论述，或许能给应用ＳＹＢＡＳＥ数据库的同志带来一些应用上的帮助。     

HYDROPHOBICITY－HYDROPHILICITY BALANCE RELATIONSHIPSFORCOLLECTORLESSFLOTATIONOFSULPHIDEMINERALS

ＨＹＤＲＯＰＨＯＢＩＣＩＴＹ－ＨＹＤＲＯＰＨＩＬＩＣＩＴＹＢＡＬＡＮＣＥＲＥＬＡＴＩＯＮＳＨＩＰＳＦＯＲＣＯＬＬＥＣＴＯＲＬＥＳＳＦＬＯＴＡＴＩＯＮＯＦＳＵＬＰＨＩＤＥＭＩＮＥＲＡＬＳＨＹＤＲＯＰＨＯＢＩＣＩＴＹ－ＨＹＤＲＯＰＨＩＬＩＣＩＴＹＢＡＬＡ...     

SYBASE系统参数的调整与系统性能

随着ＳＹＢＡＳＥ数据库越来越广泛的应用，怎样用和怎样用好ＳＹＢＡＳＥ数据库显得越来越重要。本文对ＳＹＢＡＳＥ数据库的系统参数及性能作一简单的论述，或许能给应用ＳＹＢＡＳＥ数据库的同志带来一些应用上的帮助。     

SYNTHESIS，PROPERTY AND HEAT STABILITY FO RPOLYVINYLCHLORIDSOFANTIMONYTRIS（MERCAPTOACIDESTER）

ＳＹＮＴＨＥＳＩＳ，ＰＲＯＰＥＲＴＹＡＮＤＨＥＡＴＳＴＡＢＩＬＩＴＹＦＯＲＰＯＬＹＶＩＮＹＬＣＨＬＯＲＩＤＳＯＦＡＮＴＩＭＯＮＹＴＲＩＳ（ＭＥＲＣＡＰＴＯＡＣＩＤＥＳＴＥＲ）ＳＹＮＴＨＥＳＩＳ，ＰＲＯＰＥＲＴＹＡＮＤＨＥＡＴＳＴＡＢＩＬＩＴＹＦＯＲＰ...     

THE PROCESS AND MECHANISM OF TiAl－BASED ALLOY SYNTHESIZED FROM Ti AND AlP OWDERS

ＴＨＥＰＲＯＣＥＳＳＡＮＤＭＥＣＨＡＮＩＳＭＯＦＴｉＡｌ－ＢＡＳＥＤＡＬＬＯＹＳＹＮＴＨＥＳＩＺＥＤＦＲＯＭＴｉＡＮＤＡｌＰＯＷＤＥＲＳＸｉｏｎＡｘＸｉａｎｙ；ＨｕａｎｇＢａｉｙｕｎ（ＰｏｗｄｅｒＭｅｔａｌｌｕｒｇｙＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｉｅ...     

焦作矿区采场顶板控制设计咨询系统

以“岩层运动为中心的矿压理论”为基础,将矿压理论和实践成果以及一些专家知识,按一定的规则整理成一个系统,借助于计算机系统代替人进行顶板控制设计．运行结果表明,系统对需控岩层结构、运动参数以及控顶参数等决策结果,与专家判断或实测相比有良好的一致性．     

煤矿冲击矿压的分级预测研究

针对煤矿冲击矿压灾害,研究了冲击危险性的监测原理和冲击矿压危险的分级预测准则.通过连续监测预警技术和系统集成,应用综合指数法、微震法、电磁辐射法和钻屑法,形成冲击矿压的时空分级预测技术体系,即在时间上对冲击危险进行早期综合分析预测与即时预测相结合,在空间上进行区域预测与局部监测、点预测相结合,对冲击矿压的危险性根据危险指数的大小,按无、弱、中等和强冲击危险4级进行预测.根据预测的冲击矿压危险等级,采取加强监测、解危、甚至撤人等防治对策.工程实践表明,采用该技术,可大大提高冲击危险预测的准确性,取得良好的应用效果.     

采场底板破坏带电法动态监测实验

应用直流电阻率技术,开发出了采场底板破坏带及底板水动态监测系统,应用该系统能够动态监测工作面及其采空区底板岩石的破坏程度以及底板水的运移过程,对工作面及其采空区的底板突水达到了早监测、早预测、早防治的目的。该系统由电阻率数据采集系统、数据接收转换系统和数据处理系统三部分组成,并将该系统成功地应用于某工作面的监测,总结出了许多宝贵的地质结论。     

开采沉陷岩移参数研究现状分析

开采沉陷岩移参数是表征岩层和地表移动规律的重要参数,其取值的准确与否直接影响到矿山生产设计的合理性和安全性.开采沉陷岩移参数的确定方法主要有实测数据拟合、回归分析、工程类比、神经网络、力学反演分析法和模糊数学方法.在综合分析大量文献的基础上,综述了开采沉陷岩移参数的研究现状,指出了可以应用相似理论确定不同地质采矿条件下开采沉陷岩移参数.     

Multi-parameter numerical simulation of dynamic monitoring of rock deformation in deep mining

The level of deformation development of surrounding rocks is a vital predictor to evaluate impending coal mine disasters and it is important to establish accurate measurements of the deformed status to ensure coal mine safety. Traditional deformation monitoring methods are mostly based on single parameter, in this paper, multiple approaches are integrated: firstly, both electric and elastic models are established,from which electric field distribution and seismic wave recording are calculated and finally, the resistivity profiles and source position information are determined using inversion methods, from which then the deformation and failure of mine floor are evaluated. According to the inversion results of both electric and seismic field signals, multiple-parameter dynamic monitoring of surrounding rock deformation in deep mine can be performed. The methodology is validated using numerical simulation results which shows that the multi-parameter dynamic monitoring methods have better results for surrounding rock deformation in deep mine monitoring than single parameter methods.     

Support technology for mine roadways in extreme weakly cemented strata and its application简

For the engineering geology conditions of bad mine roadway roof and floor lithology in extremely weak cemented strata, the best section shape of the roadway is determined from the study of tunnel surrounding rock displacement, plastic zone and stress distribution in rectangular, circle arch and arch wall sections, respectively. Based on the mining depth and thickness of the coal seam, roadway support technology solutions with different buried depth and thickness of coal seam are proposed. Support schemes are amended and optimized in time through monitoring data of the deformation of roadway, roof separation, I-beam bracket, bolt and anchor cable force to ensure the long-term stability and security of the roadway surrounding rock and support structure. The monitoring results show that mine roadway support schemes for different buried depth and section can be adapted to the characteristics of ground pressure and deformation of the surrounding rock in different depth well, effectively control the roadway surrounding rock deformation and the floor heave and guarantee the safety of construction and basic stability of surrounding rock and support structure.     

基于S7-400PLC构成的煤矿排水计算机控制系统

煤矿排水系统可靠与否事关重大,它直接关系到煤矿的人身、财产安全.排水设备一般功率大,耗电量多,能否节能运行直接关系到企业的生存.指出煤矿排水计算机控制系统的重要性.介绍了用西门子S7-400PLC构成的煤矿排水计算机控制系统.用简化模型分析了井下涌水和排水的关系.给出了系统结构和计算机主要的控制方式.     

Regularity and prediction of ground pressure in Haigou Gold Mine

Previous mining excavation in upper sublevels left several mined-out areas in Haigou gold mine. To ensure safety of the main and auxiliary shafts and mining production in deeper sublevels, systematical studies on regularity, prediction, and control of ground pressure in the mine were carded out. Through 3D-numerical modeling and in-situ monitoring of acoustic emission, pressure and displacement, the ground pressure activity and the stability status of surrounding rock masses and the two shafts were assessed.Based on in-situ monitoring practice in Haigou mine, 4 modes to judge rock stability according to the monitoring information of acoustic emission, pressure, and displacement were presented.     

山西常兴煤矿地下水环境问题及对策分析

山西常兴煤矿水文地质条件包括碳酸盐岩类裂隙岩溶水、碎屑岩类岩溶水和裂隙水.矿井充水通道有冒落带及裂隙带.地下水的环境问题是断层裂隙带及井筒充水、顶板淋水等.估算了采煤破坏的水资源量及对下伏含水层和居民生活饮用水的影响;提出了水环境问题的防治对策:打深井解决居民生活饮用水,进行矿井污水处理及地下水监测;最后给出结论和建议.     

微震信号现场监测试验及特征研究

为研究煤岩破裂微震信号的特征,利用微震监测系统对井下煤岩进行微震信号的监测试验,分析了煤岩破裂微震信号的变化规律。试验结果表明:微震信号的变化趋势与煤岩发生破裂的强弱基本呈正相关。微震信号强度强,煤岩发生破裂伴随着较大能量,之后随着时间的增长,能量逐渐减小,微震信号也明显减弱,直到最后传感器监测不到信号。