共查询到20条相似文献，搜索用时 62 毫秒
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介绍了矿山地震与瓦斯突出等煤矿灾害及成因， 并通过若干煤矿瓦斯突出和矿山地震的同震现象，论述了这些灾害在动力过程中的内在关系.这些震例表明，在高瓦斯煤矿， 矿山地震与瓦斯突出存在密切的相关.认为较大矿震伴随瓦斯的低值延时响应可能是瓦斯突出的预警信号.从矿震定位、震源机制、矿震成因、瓦斯突出条件等分析了矿震与瓦斯突出相关的机理. 进一步介绍了瓦斯流体对矿震的触发作用，尤其超临界流体的特殊性质在矿震发生中的重要作用.依据矿震与构造地震在机制方面的相似性， 讨论了上述结果在震源物理研究中的意义. 相似文献
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矿山地震是一种与开采有关的构造地震。本文阐述了矿震的概念及现象,介绍了目前矿震研究的现状,论述了矿震研究在矿山灾害研究及地震学研究方面的意义,对开阔地震研究领域具有一定的参考价值。 相似文献
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由于区域地震台网布设到开采矿区，加拿大对矿震活动的监测工作已得到了改进。矿震的强度、频度，会随着采矿向更深处发展并随开采率的加速而增加．因为许多矿山（钾盐、煤和金属）的面积范围较大，所以现今监测这些矿震的最可行和最实用的方法是，在发生微震活动的矿内或矿的地表布设地震台网。在少数几个矿山周围已部署了地震台网，并且还计划在近代经历过剧烈矿震的其它矿山周围布设地震台网。本文描述了６次矿震的震源机制，并且介绍了有关的Ｐ波、Ｓ波辐射图像。把实际地震的辐射图像与理论上的预测进行比较，是判断潜在源机制的快速方法，另外，可用识别较大事件前的微震活动图像方法来减轻严重事件所造成的潜在损失。 相似文献
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矿山地震监测技术的进展及最新成果 总被引：26，自引：6，他引：20
回顾了矿山地震监测的简史,介绍了近期矿震监测技术改造情况．抚顺小孔径矿山地震台网的监测取得了比较完整的观测资料．矿震定位结果表明了矿震与开采进程的相关性．用岩石断裂力学和损伤理论的研究成果对于两类不同矿震的成因给出了最新解释．观测资料证实了矿震与瓦斯溢出的相关性．这些结果表明．在一定条件下．矿震可能成为瓦斯溢出的预警信号．由此证明,实现矿震与瓦斯浓度的联合监测是重要的,也是可行的．矿山地质灾害的综合地球物理监测对于地震成因的研究具有重要的中尺度实验意义,同时对于煤矿安全生产也将带来重要效益． 相似文献
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澧水流域矿山开采与诱发地震 总被引：1，自引：0，他引：1
从澧水流域矿山开采现状入手,通过对几个矿震的剖析,总结了该区矿震的几个特点。结合地震地质条件,对澧水流域未来矿山诱发地震形势作了分析,对矿山诱发地震的监测与防治工作提出了建议。 相似文献
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M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
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《中国科学:地球科学(英文版)》2014,(3)
正SCIENCE CHINA Earth Sciences,an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China,and published by Science China Press and Springer,is committed to publishing high-quality,original results in both basic and applied research. 相似文献
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《国际泥沙研究》2014,(4)
正Director:Shangfu Kuang,China Vice-directors:Chunhong Hu,China Duihu Ning,China Guangquan Liu,China The International Research and Training Center on Erosion and Sedimentation(IRTCES)was jointly set up by the Government of China and UNESCO on July 21,1984.It aims at the promotion of international exchange of knowledge and cooperation in the studies of erosion and 相似文献
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Richard D. Hey 《地球表面变化过程与地形》1979,4(1):59-72
Feedback mechanisms, which operate upstream through drawdown and backwater effects and downstream through sediment discharge are responsible for channel evolution. By combining these mechanisms with channel processes it euables a dynamic process-response model to be developed to simulate the initial evolution of straight gravel-bed channels. When erosion commences on a land surface, sediment entrained in the headwater reach by hydraulic action is selectively transported, deposited and reworked. This produces a damped oscillation between degradation and aggradation as the channel and valley respond to spatial and temporal variations in sediment calibre and hydraulic conditions. The initial cut and fill phases are responsible for valley incision and floodplain development while secondary and subsequent activity can produce river terraces. Eventually sediment entrainment in the headwaters declines as slopes are reduced. Subsequent channel evolution is relatively insignificant because it is dependent on local weathering activity producing material that can be transported on declining slopes. Therefore landforms produced during the initial phase of development, when local weathering was non-limiting, dominate the landscape. 相似文献