德州市临盘采油区地面沉降监测

Land Subsidence Monitoring of Linpan Oil Mining Area in Dezhou City

济南市的鹊山上设立了3块岩层水准标石的原点组。使用美国Tri mble Di Ni 12电子水准仪和条码式铟钢水准标尺施测一等精密水准82.2 km,二等精密水准30.8 km,联测各类水准点35个。对观测结果进行统计与分析表明,在临盘采油区(以后仓西北采油四队LY18为中心)形成了一个较明显的沉降区域,年沉降量为54.3 mm。建议在其周边增埋地面观测标石,进行加密观测,以掌握其变化规律。

Three stone rocks which marked the starting point of the standard group have been established in Queshan of Jinan city. By using the United States Trimble DiNi 12 Electronic Level and steel bar--type indium standard ruler, 82.2km level with the first--class standard precision, 30.8km level with the second --class standard precision and 35 measurement points with all kinds of standards are tested. On the basis of observation and analysis of statistics, it is showed that there is an obvious subsidence area in Linpan oil mining region （regarding LY 18oil mining spot of No. 4 oil mining brigade in northwest Houcang as the center） . The settlement depth is 54.3mm in each year. It is suggested that ground--based observation stones should be buried in its surrounding area so as to grasp its changing rule.