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高能量密度爆炸与化学爆炸的物理特征及爆炸次生洪水波效应探讨 被引量:1
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作者 周丰峻 《中国工程科学》 2000年第12期45-51,共7页
文章根据高能量密度爆炸的辐射流体动力学计算与TNT装药爆炸计算的结果 ,对二类爆炸波系的形成发展 ,爆炸近区、远区的物理特征和爆炸作用物理模拟问题进行了研究 ,得出了对防护工程比较重要的几点结论。同时对于同两类爆炸引起的次生... 文章根据高能量密度爆炸的辐射流体动力学计算与TNT装药爆炸计算的结果 ,对二类爆炸波系的形成发展 ,爆炸近区、远区的物理特征和爆炸作用物理模拟问题进行了研究 ,得出了对防护工程比较重要的几点结论。同时对于同两类爆炸引起的次生洪水波灾害进行了探讨 ,阐明了系统开展洪水波防护研究的重要意义。 展开更多
关键词 高能量密度爆炸 化学爆炸 冲击 次生洪水 洪水灾害 防护 辐射流体动力学
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雷电及其灾害
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作者 鲁正刚 《临沧科技》 2004年第3期45-46,共2页
雷电是发生在大气层中的声、光、电物理现象,由于其强烈的闪光和巨大的声响,且常常给人类带来各种灾祸。加之人们对其缺乏了解,所以一度被披上迷信的色彩。随着科学技术的发展,人们对雷电逐渐有了认识。我国明代刘伯温在《刘文正公... 雷电是发生在大气层中的声、光、电物理现象,由于其强烈的闪光和巨大的声响,且常常给人类带来各种灾祸。加之人们对其缺乏了解,所以一度被披上迷信的色彩。随着科学技术的发展,人们对雷电逐渐有了认识。我国明代刘伯温在《刘文正公文集》中讲:“雷为何物也?日雷者,大气之郁而激发也,阴气团于阳,必迫。 展开更多
关键词 雷电 灾害 发生频率 感应雷击 灾害波 耐冲击能力
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核武器与常规武器爆炸次生洪水波灾害防护
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作者 周丰峻 高俊 《防护工程》 1999年第1期6-12,共7页
关键词 水利枢纽 溃坝 洪水灾害 防护 轰炸 防空
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The study of acoustic emission (AE) forecasting coal and rock disaster technique 被引量:9
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作者 ZOU Yin-hui 《Journal of Coal Science & Engineering(China)》 2009年第2期157-160,共4页
Introduced the coal and rock AE propagation rule,wave guide fixing technics onAE sensors,and AE forecasting coal and rock disaster on the scene and so on,The coaland rock AE propagation rule that follows the exponent ... Introduced the coal and rock AE propagation rule,wave guide fixing technics onAE sensors,and AE forecasting coal and rock disaster on the scene and so on,The coaland rock AE propagation rule that follows the exponent attenuation function on different AEfrequencies,different quality factors and different propagation distances were analyzedand deduced by theory,numerical simulation,and by actual experiment.Consequently,itwas deduced that the coal and rock AE propagation rule follows the exponent attenuationfunction.Based on the correlative theory of wave dynamics and AE sensor,the AE waveguide propagation mechanical model on the sensor fixing manner is found,and the relationsof displacement and speed and acceleration between the AE signal source and theAE signal receiving terminal are presented.The effect of the AE sensor fixing manners oncoal and rock surfaces,coal and rock bottoms and wave guides were studied by actualexperiment.For the results,the effect of the AE sensor fixing manner on wave guides isbetter than on coal and rock surfaces,and was equivalent to the fixing manner on coal androck bottoms.Based on the above study results,actual coal and rock dynamistic disasterswere successfully forecasted. 展开更多
关键词 acoustic emission coal and rock body propagation laws wave guide installation technique coal and rock dynamic disasters
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Scale of seismic and rock burst hazard in the Silesian companies in Poland 被引量:8
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作者 PATY■SKA Renata KABIESZ Józef 《Mining Science and Technology》 EI CAS 2009年第5期604-608,共5页
Presently the seismic and rock burst hazard appears still to be important in most of hard coal mines in Poland. Recently, there was a significant increase of seismic activity of the Silesian rock massive, when compare... Presently the seismic and rock burst hazard appears still to be important in most of hard coal mines in Poland. Recently, there was a significant increase of seismic activity of the Silesian rock massive, when compared with the previous years. In the period 1999-2008 the hard coal mines experienced 34 rock bursts. The causes of rockburst occurrence are presented based on the analysis of the rockbursts occurring in the Polish hard coal mines. The scale of the rockburst hazard has been characterized with respect to the mining and geological conditions of the existing exploitation. Of the factors influencing the state of rockburst hazard, the most essential one is considered the depth interval ranging from 600 m to 900 m. The basic factors that promote the rockburst occurrence are as follows: seismogenic strata, edges and remnants, goal, faults, pillars and excessive paneling. 展开更多
关键词 rockbursts mining and geological conditions
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A three-dimensional matching localization algorithm based on helix triangular pyramid array
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作者 ZHAO Jiu-bin LIU Yuan-xue +1 位作者 LIU Chang-jia LING Yue 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第3期816-833,共18页
On the eve of the occurrence of geological hazards,part of the rock and soil body begins to burst,rub,and fracture,generating infrasound signals propagating outward.3D advanced positioning of the landslide has remaine... On the eve of the occurrence of geological hazards,part of the rock and soil body begins to burst,rub,and fracture,generating infrasound signals propagating outward.3D advanced positioning of the landslide has remained unsolved,which is important for disaster prevention.Through the Fourier transform and Hankel transform of the wave equation in cylindrical coordinates,this work established a three-dimensional axisymmetric sound field model based on normal waves,and designed a 4-element helix triangular pyramid array with vertical and horizontal sampling capabilities.Based on this,the three-dimensional matching localization algorithm of infrasound for geological hazards is proposed.Applying the algorithm to the infrasound signal localization of rock and soil layers,it was found that the helix triangular pyramid array can achieve accurate estimation of depth and distance with a smaller number of array elements than the traditional array,and may overcome the azimuth symmetry ambiguity.This study shows the application prospects of this method for predicting geohazards position several hours in advance. 展开更多
关键词 geologic hazards INFRASOUND helix triangular pyramid array 3D matchinglocalization algorithm
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Removal of noises from electromagnetic radiation of coal or rock with EEMD-adaptive morphological filter 被引量:1
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作者 CHEN Shi-hai WANG En-yuan 《Journal of Coal Science & Engineering(China)》 2012年第3期330-336,共7页
The electromagnetic radiation (EMR) signal collected by monitoring system during coal or rock dynamic disaster may be interferred easily by electromagnetic noises in mines. The noises have a direct influence on the ... The electromagnetic radiation (EMR) signal collected by monitoring system during coal or rock dynamic disaster may be interferred easily by electromagnetic noises in mines. The noises have a direct influence on the recognition and analysis of the EMR signal features during the disaster. With the aim of removing these noises, an ensemble empirical mode decomposition (EEMD) adaptive morphological filter was proposed. From the result of the simulation and the experiment, it is shown that the method can restrain the random noise and white Gaussian noise mixed with EMR signal effectively. The filter is highly useful for improving the robustness of the coal or rock dynamic disaster monitoring system. 展开更多
关键词 coal or rock dynamic disaster electromagnetic radiation EEMD morphological filter DENOISING
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Gas and rock-bump hazard monitoring in the Polish mining
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作者 ISAKOW Zbigniew KRZYSTANEK Zdzislaw +1 位作者 TRENCZEK Stanistaw WOJTAS Piotr 《Journal of Coal Science & Engineering(China)》 2009年第3期229-232,共4页
Described the main environmental hazards occurring in Polish undergroundmines and their continuous growth in recent years as well as equipment and systemswhich were used for monitoring mine air parameters and geodynam... Described the main environmental hazards occurring in Polish undergroundmines and their continuous growth in recent years as well as equipment and systemswhich were used for monitoring mine air parameters and geodynamic phenomena.Thelatest versions of environmental hazard monitoring systems,having a form of a comprehensiveset of underground and surface equipment,are presented and their functionscharacterized. 展开更多
关键词 gas and rock-bump HAZARD monitoring
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Debris flows monitoring and localization using infrasonic signals 被引量:4
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作者 LENG Xiao-peng LIU Dun-long +2 位作者 WEI Fang-qiang HONG Yong DAI De-fu 《Journal of Mountain Science》 SCIE CSCD 2017年第7期1279-1291,共13页
Infrasonic waves (frequency 〈 2o Hz) are generated during the formation and movement of debris flows, traveling in air with a speed far higher than that of the debris-flow movement. Infrasound monitoring and locali... Infrasonic waves (frequency 〈 2o Hz) are generated during the formation and movement of debris flows, traveling in air with a speed far higher than that of the debris-flow movement. Infrasound monitoring and localization of infrasonic waves can serve as warning properties for debris-flows. Based on the characteristics of infrasonic signals, this study presents a three-point array of infrasound sensors as time-synchronous multiple sensors for acquiring signals. In the meantime, the signals are sorted by mutual correlation of signals to figure out their latency, and by means of array coordinating to Locate the sound source to realize the monitoring and positioning of a debris-flows hazard. The method has been in situ tested and has been proven to be accurate in monitoring debris-flow occurrences and determining their positions, which is particularly effective for pre-event warning of debris-flow hazards. 展开更多
关键词 Debris flow INFRASOUND Debris flowmonitoring LOCALIZATION
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