grass root's

Factors affected the data quality include the Quaternary washings covering the earth surface, unconsolidated rocks, shallow depth of targets, enriched minor faults, and ambient noises.

二连盆地地震反射资料频率及信噪比低的原因是,区内地表为第四系泥沙覆盖,岩石松散,目的层埋深浅, 小断层发育以及环境噪声等,这些因素极大地影响了采集资料的质量。

When used to surface geochemical exploration, it can predict and judge the position and properties of the transverse profile of the oil-gas zone.

应用于地表天然气化探,可预测与判断油气层的横向剖面位置;应用于井中天然气化探,可根据顶空气的轻烃组成和含量上的特征,准确预测与判断天然气层的纵向剖面位置与性质。

Up to now a whole series of methods and(indicators) have been set up so as to detect the physical,chemicalandbiologicalchanges related to hydrocarbon microseep in surface environment.

至今,已经形成了一系列方法指标,用于检测地表环境中与烃类微渗漏有关的各种物理、化学、生物学变化,检测地表微量油气信息的化探实验测试技术得到了长足的发展,根据地表化探异常评价深部含油气性的可靠性也大大提高。

Based on the running tunnel of Yuexiu park and Sanyuanli in Guangzhou metro line 2,the influence of in-situ stress release on the stability of surrounding rock masses and ground surface settlement for shield-driven tunnel is analysed by using the elastoplastic finite element method.

针对广州地铁二号线越秀公园—三元里区间隧道,采用弹塑性有限元法分析了地应力释放对盾构隧道围岩强度和变形以及地表沉降变形的影响。

Measurement of total nitrogen of surface water by ion chromatograph;

离子色谱法测定地表水中的总氮

Appraisal of surface water quality reaching standard and analysis of water quality variation in Liao river basin;

辽河流域地表水水质达标评价及水质变化分析

Distribution of PAHs in surface waters of Hebei Province;

河北省地表水中多环芳烃的分布特征

Based on thin plate bending theory of elasticity theory, a model of space layer was applied to solve the problem about ground surface movements due to underground rock excavation.

以弹性薄板弯曲理论为基础 ,对层状矿体开采引起的地表及岩体移动问题 ,引入层状模型进行描述 ,得到了水平及倾斜矿体开采的地表移动空间解析式、计算程序 ,并用于地表移动预计 ,现场实测结果与计算结果对比 ,效果较好。

Stochastic medium method is adopted for the prediction of ground surface movements and deformations due to collapse of mine caves along Leiyi Highway of Hunan Province,and the detailed analysis results of Dongwang colliery are presented.

采煤空区坍塌引起的地表移动与变形是确定路基稳定性的主要依据。

Relations between changes of constitution stress field due to mining process and earth surface cracks;

模型半定量地给出了地表开裂的力学原因,并对地表裂缝的进一步发展作了预测。