本文主要叙述利用近年来北京及其附近地区八次工业爆破的观测资料,同时也利用了一部份天然地震的资料来研究北京—天津—唐山—张家口地区地壳结构的结果,采用了工业爆破中的58个观测点和天然地震的54个观测点的数据,得到了本区的三层地壳模型和地壳厚度。 地壳的平均厚度分布各地区不很一致;北京及其东南地区为35±1.5公里,北部地区为37±1.0公里,西部地区为39±1.5公里,地壳介质中的纵波和横波的平均速度分别为6.23±0.03公里/秒和3.55±0.05公里/秒,上地幔顶部介质的平均速度为7.98±0.13公里/秒和4.60±0.03公里/秒。 This paper mainly describes the observation data of eight industrial explosions in Beijing and its vicinity in recent years. It also uses the data of some natural earthquakes to study the crustal structure in the Beijing-Tianjin-Tangshan-Zhangjiakou area. The industrial blasting The data of 58 observation points and 54 observation points of natural earthquakes have obtained the three-layer crustal model and crustal thickness in this area. The average crustal thickness distribution is not very consistent across all regions; Beijing and its southeastern region is 35 ± 1.5 km, the northern region is 37 ± 1.0 km and the western region is 39 ± 1.5 km. The average longitudinal and transverse wave velocities in crustal media are 6.23 ± 0.03 km / s and 3.55 ± 0.05 km / s. The average velocity of the medium in the upper mantle was 7.98 ± 0.13 km / s and 4.60 ± 0.03 km / s.