固体潮汐应力与矿震触发之间的相关性及其作用机理分析 |
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引用本文: | 张月征,纪洪广,蔡美峰,李铁,向鹏. 固体潮汐应力与矿震触发之间的相关性及其作用机理分析[J]. 采矿与安全工程学报, 2016, 0(3): 535-543. DOI: 10.13545/j.cnki.jmse.2016.03.024 |
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作者姓名: | 张月征 纪洪广 蔡美峰 李铁 向鹏 |
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作者单位: | 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083 |
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基金项目: | 国家自然科学基金重点项目(51534002) |
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摘 要: | 矿震的发生与地球固体潮汐活动存在一定相关性,为进一步探明固体潮汐应力对矿震的触发作用,本文以国内典型冲击灾害频发的华亭煤田矿区为研究背景,采用Schuster检验方法对发生在顶板中的矿震进行了固体潮日潮变化的统计分析。结果显示:1)固体潮汐应力对矿震的发生存在显著触发作用,矿震发生的频次与潮汐应力垂直、东西、南北和水平剪应力分量的相位角之间都有显著的相关性,Schuster检验P值均小于触发阈值0.05;2)潮汐应力对不同级别矿震触发作用存在差异,随着震级的增大,矿震的发生由重力控制转为构造应力控制;3)对不同类型矿震的触发力学作用不同,对于重力控制的中小型矿震,潮汐应力垂直分量最大(受压)、水平分量最小(受拉)时矿震较易发生,而构造应力控制的大级别矿震则与之相反;4)矿震活动也会造成相关区域地层中的钻孔应变时序形态产生畸变。
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关 键 词: | 矿震 潮汐应力 相关性 触发机理 |
Triggered effect of solid tidal stress on rockburst and its mechanism |
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Abstract: | There is certain correlation between the occurrence of rockburst and the activity of solid earth tides. In order to further prove triggered effect of solid tidal stress on rockburst, with Huating coalfield as research background, the relationship between rockburst occurring in the roof and the diurnal changes of the tidal has been analyzed through the Schuster inspection method. The results have shown that:1) The solid tidal stress has a significant effect on the occurrence of rockburst. There is a significant correlation between the frequency of rockburst occurrence and the vertical, the horizontal shear stress component of the tidal stress, the value of the P of Schuster inspection is less than that of the triggering threshold value 0.05. 2) The tidal stress has different effects on different levels of rockburst, and with the increase of magnitude, the occurrence of rockburst is controlled by gravity to tectonic stress. 3) For different types of rockbursts, the triggered mechanical function is different. For small and medium-sized rockbursts controlled by gravity, when tidal stress vertical component and the largest minimum horizontal component the rock burst occurs more easily, while the bigger rockbursts controlled by tectonic stress are opposite. 4) The rockburst activities can also cause the distortion of time sequence and shape in the borehole strain in related regional strata. |
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Keywords: | rockburst tidal stress correlation trigger mechanism |
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