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The velocity of an over-burst coal seam is about 1/3 compared to a normal coal seam based on laboratory test results. This
can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation
result of the theoretical seismic model shows that there is obvious distinction between over-burst coal and normal coal based
on the coal reflection’s travel-time, energy and frequency. The results from the actual seismic data acquired in the coal
and gas over-burst cases is consistent with that of the laboratory and seismic modeling; that is, in the coal and gas burst
region, seismic reflection travel time is delayed, seismic amplitude is weakened and seismic frequency is reduced. Therefore,
it can be concluded that seismic exploration technique is promising for use in distinguishing coal and gas over-burst regions
based on the variation of seismic reflection travel time, amplitude and frequency.
Supported by the Key Program of National Basic Research Program(973) of China (2006CB202208); the CBM Important Project of
2008ZX05040-003 in China 相似文献
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以宁夏宁东煤田积家井矿区银星二号煤矿三维地震勘探资料解释为例来说明地震资料精细解释的技术方法和应用.对地震资料利用各种方法、各种手段进行综合解释,从而将三维地震勘探的精度和可靠程度提高到了一个新的水平. 相似文献
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近年来,以三维地震勘探为基础的采区三维地震勘探为煤矿采区的开发决策、巷道布置与开拓提供了可靠依据,提高了地震解释的精度和效率,具有良好的效果。本文针对山西宁武煤矿地形和地质的特殊性,从多方面阐述了三维地震勘探技术在宁武煤矿采区的应用过程,指出该技术有较高的准确率,应广泛用于煤矿采区。 相似文献
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爆破地震效应与减震方法的探讨 总被引:5,自引:0,他引:5
本文对比了爆破地震与天然地震在能量传播方式,地震效应、现场测试等方面的差异与联系,区分了地震疚和结构动态响应,并从能量源、能量传播介质、能量传播过程三方面阐明了该减震方法的实质。 相似文献
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本文以攀钢石灰石矿为例,选择了爆破震动传播规律的经验公式,探讨了不同爆破方法对边坡的振动大小及其规律性,介绍了临近边坡最大允许速度和不同爆区最大允许药量计算以及维护边坡稳定的降震措施。 相似文献