山东省金桥煤矿塌陷地综合治理研究     

寿冀平  张太平  吕晓舟 《山东国土资源》2009,25(11):34-37,40

通过对金桥煤矿开发利用方案的分析，结合煤层赋存特征，进行了塌陷地预测．并与首采区实际塌陷地对比分析了预测的可靠性。按照边开采边治理的原则，提出了首采区塌陷地综合治理方案，为恢复矿山环境提供了依据。  相似文献   

Aeolian sediment provenance and transport in the upper and middle reaches of the Yarlung Zangbo River,Tibet Plateau     

Zhengcai Zhang  Pengfei Ma  Zhen La  Yan Zhang  Aimin Liang 《Basin Research》2023,35(2):762-783

Frequent and serious aeolian disasters occur in the upper and middle reaches of the Yarlung Zangbo River, which runs through the high-elevation Tibet Plateau. Sediment geochemical characteristics can be used as a proxy to identify the sediment's provenance. To determine the provenance of aeolian sediments in the river's basin, we analysed major and trace element contents from surface samples and local clastic rocks throughout the basin. We found that the major and trace elements differed between the middle reaches, upper reaches and regions south of the river. Major element contents were similar in the upper and middle reaches, but trace elements differed. Al₂O₃, MgO and Na₂O concentrations increased from the upper reaches to the lower reaches, and in the lower reaches, MgO and Na₂O were enriched compared with the crustal average. The similarities between samples in the lower part of the upper reaches and those in the middle reaches indicated that sediment transported by fluvial systems from the upper reaches were first deposited in the wide valleys near Xigaze, where they formed a large area of shifting sand. These deposits were then transported by the wind to the river's middle reaches, where they formed a large area of shifting sand. When we compared aeolian sediment in the middle reaches with the local clastic rocks, they appeared to be unrelated. The difference between sediments south of the river and those in the middle reaches means that the southern sediments were not transported to the middle reaches. Therefore, the aeolian sediment in the middle reaches of the Yarlung Zangbo River mainly came from the lower part of the upper reaches, not from the local clastic rocks.  相似文献   

探雷声呐随机触点产生机理与分布          下载免费PDF全文

马爱民  张琦  崔鹏 《数字海洋与水下攻防》2019,2(1):4-7

探雷声呐搜索水雷时会发现录取大量随机触点,导致分类辨识效率低下。 用海底微小目标的随机强反射特性解释随机触点的产生;运用聚类方法获得海底小目标的概率分布曲线,划分纯随机虚触点、 低重复虚目标和高重复似雷目标 3 个组成部分;提出直接剔除虚触点可有效提高辨识效率。  相似文献   

Stochastic mechanics-based Bayesian method calibrating the constitutive parameters of the unified model for clay and sand with CPTU data     

Fu  Yanbin  Ma  Chengtao  Bian  Yuewei  Lv  Guiyang  Hu  Yu  Wang  Changhong 《Acta Geotechnica》2022,17(10):4577-4598

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阳谷县农村村庄地籍管理数据库建设的探索与实践     

吕华清  张建英 《山东国土资源》2009,25(6):7-9

阳谷县国土资源局在全面完成土地调查与城镇地籍调查两项数据库建设的基础上，依据自身测绘优势，结合农村集体建设用地使用证年检，在全省率先建立起农村村庄地籍管理数据库，实现了地籍调查数据库建设的全覆盖，走出一条以图管地的新路子。目前，全县已建立12万宗地农村宅基地的数据库。  相似文献