中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2015年
7期
77-79
,共3页
含夹矸煤层%频散特性%勒夫型槽波%埃里相特征%槽波勘探
含夾矸煤層%頻散特性%勒伕型槽波%埃裏相特徵%槽波勘探
함협안매층%빈산특성%륵부형조파%애리상특정%조파감탐
coal seam with gangue%dispersion features%Love mode channel wave%Airy phase features%in-seam seismic prospecting
槽波地震勘探是常用的井下物探技术,为达到预测煤层夹矸结构的目的,依据弹性波理论,推导了含夹矸煤层的勒夫型槽波频散方程,在此基础上,分析了夹矸的结构和物性变化对槽波频散特性的影响.研究表明槽波频散特性受夹矸厚度、位置以及速度变化的影响较大:夹矸厚度越大,夹矸距离煤层中心位置越近,夹矸速度越大,勒夫型槽波的速度就越大,埃里相特征也就越不明显.
槽波地震勘探是常用的井下物探技術,為達到預測煤層夾矸結構的目的,依據彈性波理論,推導瞭含夾矸煤層的勒伕型槽波頻散方程,在此基礎上,分析瞭夾矸的結構和物性變化對槽波頻散特性的影響.研究錶明槽波頻散特性受夾矸厚度、位置以及速度變化的影響較大:夾矸厚度越大,夾矸距離煤層中心位置越近,夾矸速度越大,勒伕型槽波的速度就越大,埃裏相特徵也就越不明顯.
조파지진감탐시상용적정하물탐기술,위체도예측매층협안결구적목적,의거탄성파이론,추도료함협안매층적륵부형조파빈산방정,재차기출상,분석료협안적결구화물성변화대조파빈산특성적영향.연구표명조파빈산특성수협안후도、위치이급속도변화적영향교대:협안후도월대,협안거리매층중심위치월근,협안속도월대,륵부형조파적속도취월대,애리상특정야취월불명현.
The In-seam seismic prospecting is a commonly used underground geophysical prospecting technology. To accomplish the mission of coal seam gangue structure prediction, based on elastic wave theory has deducted a Love mode channel wave dispersion equation for coal seams with gangue. On this basis, impacting from gangue structure and physical property variation on channel wave dispersion features analyzed. The study has shown that the channel wave dispersion features have largely impacted by gangue thick-ness, position and velocity variation. The larger the gangue thickness, the nearer the gangue apart from coal seam center and the larger the velocity in gangue can make the larger Love mode channel wave velocity and more inconspicuous Airy phase features.
