中国大陆地壳应力环境基础数据库数据格式与标准

FORMAT AND STANDARD OF DATA IN CRUSTAL STRESS DATABASE IN CHINAAND ADJACENT AREA

中国大陆地壳应力数据库地应力资料分为 7 大类型,分别为震源机制解、钻孔崩落、水压致裂、应力解除、断层滑动、连续应力应变及其他资料。资料覆盖了中国大陆及周边地区。提出了地应力数据库的数据代码的分类方法、数据质量的划分和数据入库的属性格式标准,并与国际标准基本一致。迄今为止,共收集了 4 700 多条数据,其中震源机制解资料 3 320 条,水压致裂资料 192 条,应力解除资料 340 条,钻孔崩落资料 454 条,断层滑动资料 420 条。此外,还收录了 23 个台站有关地应力相对变化的应力应变观测资料。在收录的数据中,有 4 200多条数据的质量是可信的,其水平主应力的方位标准偏差小于 25°。

The in-situ stress information of crustal stress database in China is grouped into seven categories, earthquake focal mechanisms, well bore breakouts, hydraulic fracturing, overcoring, fault slip, stress and strain in series and orders. The data overlay China and adjacent area. The type of stress indicators, data quality assignment and the format and standard of input data in the stress database are put forward, and consistent with international standard. Up to date, more than 4700 items of in-situ stress data have been compiled in database. There are 3320 items for earthquake focal mechanisms, 454 items for well bore breakouts, 192 items for hydraulic fracturing, 340 items for overcoring, 420 items for fault slip, as well as many items of relative information of stress and strain from 23 stations. Among the data, over 4200 items are considered reliable items, with standard deviation of horizontal stress orientations less than 25°.