山前带 meaning in English
mountain front
piedmont zone
Examples
- Studying the practicable investigation method of surface stratum and applying for the actual production aiming at the surface stratum characteristics of the different areas of front - zone of mountain in the west
针对西部地区山地山前带不同区带的表层特点，研究切实可行的表层调查方法，并应用于实际生产中。 - By way of theory research and tackling key problem about the gathering technology of field seismic datum , forming a series of advanced and practical gathering method and technology in the complicated front - zone of mountain , gaining obvious geology effect
通过对理论研究和野外地震数据的采集技术攻关，形成了一套在复杂山地山前带先进、实用的采集方法技术系列，取得了明显的地质效果。 - To do the investigating and studying work about the achievements of tackling key problem of the quondam exploration of front - zone of mountain , to analyze and study the applicability about the gathering technology used in the seismic exploration of the complicated construction belt of front - zone of mountainous ; 2 . combining the quondam achievements , researching the design method of observation system objective of the complicated construction belt based on seismic - geology model , firstly , building the surface level and deep layer seismic - geology model of complicated construction belt and analyzing the forward model , secondly , designing the observation system aiming at the overthrust nappe structure in section and in area ; 3 . aiming at the complicated earth ' s surface condition of front - zone of mountain , how to select the exciting method and the parameter , how to optimize the environment of exciting method and reception , how to pledge the normal combination of the datum of different exciting method ; 4
根据山前带的地震地质条件特点，本文主要研究了以下几个方面的内容： 1 、对以往山前带地震攻关成果开展调研工作，分析研究在山地山前复杂构造带所采用的地震勘探采集技术的适用性； 2 、研究基于地震地质模型的复杂构造带观测系统目标设计方法：如何建立复杂构造带的表层、深层地震地质模型，利用正演分析目标区的观测系统；针对逆掩推覆体构造，如何分区分段有针对性设计观测系统等； 3 、针对复杂地表条件的山地山前带，如何选择激发方式、参数，如何优选激发、接收环境，如何保证不同激发方式的资料能正常拼接； 4 、山前带巨厚砾石区的表层结构调查技术及静校正方法研究。 - Owing to complicated earth ' s surface condition such as the steep stratum outcropping of front - zone of mountain or the huge thick gravel stratum ' s overlay and earth ' s surface large undulation , complicated underground geology structure developed extremely such as thrust and overthrust nappe , and violent change of the lateral velocity , etc . in front - zone of mountain there are a series of problems such as serious secondary disturbance and low signal - to - noise ratio in seismic exploration gathering
由于山前带高陡岩层出露或巨厚砾石层的覆盖、地表起伏大等复杂的地表条件、逆冲和逆掩推覆等复杂地下地质构造发育、速度横向变化剧烈等原因，造成了山前带地震勘探资料采集存在次生干扰严重和信噪比低等一系列问题。