An Introduction to USGS Topo Maps by Hartwig Hochmair, Adam Benjamin

“…In 1879, the United States Geological Survey began to map the topography of the United States, producing new map versions of each area at semi-regular time intervals. …”
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Research on Anti-seepage Curtain Layout of a Deep Foundation Pit near the Levee by WANG Xuehong, LIU Xiaoqing, ZHANG Hui, WANG Xin, YAO Lu

“…A deep foundation pit project is located in the east of the levee at Yangzhou section of the Grand Canal.There are silt soil and silt sand layers in the bottom of the foundation pit within excavation depth,which is prone to seepage accidents,threatening the safety of the levee.Based on MIDAS GTS,this paper establishes a three-dimensional finite element simulation model according to the geological survey data,discusses the seepage situation of each excavation stage before and after adding curtain and with different lateral curtain width in detail,and analyzes the relationship between lateral curtain width and levee and foundation pit.The results show that:The seepage gradient of the two corners of the foundation pit near the levee is the largest without curtain,and the seepage damage is easy to occur near the two corners;The seepage gradient at the bottom of the intermediate curtain will slightly increase with the increase of the lateral curtain width;From the technical and economic point of view,the seepage prevention effect is obvious when the lateral curtain width is 17 m;The seepage gradient at the bottom of the intermediate curtain and at the end of the lateral curtain is large which should be paid close attention to.The research results provide an empirical reference for similar projects.…”
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Numerical Simulation on Heat Recovery Efficiency of Different Working Fluids in High-Temperature Rock Mass by Xu Dong, Haozhe Geng, Guan Hao, Pan Li, Yi Teng, Wen Zhang

“…This study will provide a technical guidance for thermal energy exploitation of hot dry rock under different geological conditions.…”
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Regression Analysis of Initial Geostress Field for Deep-Buried Tunnel of Water Resources Allocation Project in Guangdong Province around the Beibu Gulf by DAI Zhikun, ZHENG Xiao, YOU Siqin

“…Geostress has important influence on the surrounding rock of the deep-buried tunnel during its construction.Accurately identifying the initial geostress of the engineering area can effectively guide the design and construction of the tunnel.In order to study the distribution of initial geostress in the deeply buried tunnel area of water resources allocation project in Guangdong Province around the Beibu Gulf,a three-dimensional geological model was established via the finite difference software FLAC^3D,by reference to the geoengineering conditions and measured data on geostress,with the relevant analysis and calculation conducted under the separate effects of each factor concerning the initial geostress field.And the a multiple regression model between measured and calculated values was established to work out the optimal regression coefficient through multiple regression analysis,thus obtaining the regression equation of geostress.By comparing the regression values and the measured values,it is found that the magnitude and direction of the two values are close to each other,indicating that the initial geostress field established by regression analysis is reasonable and can provide effective basic data for subsequent evaluation of the stability of surrounding rock of the tunnel,support design and long-term safety evaluation and prediction.…”
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How to support recovery phase for landslide through livelihoods? case study: Kulon Progo Regency, Indonesia by Setyawati Dewanti Diah, Jaenul Haq Jejen, Viviani Nurhanifah Nita, Bi Chuanchen

“…Among these events, rainfall-induced landslides are recognized as one of the most severe geological disasters, particularly in Indonesia. The recovery phase is often the weakest link in disaster management implementation. …”
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MFIEN: multi-scale feature interactive enhancement network for seismic data denoising in desert areas by Tie Zhong, Yuxin Ye

“…Abstract Due to complex acquisition environments and geological conditions, in desert seismic data, the background noise is always intense and overlaps with the frequency range of the seismic signals. …”
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Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy by Wang Jingfu, Chen Jingan, Dai Zhihui, Yang Haiquan, Ma Chenyan

“…In this study, XANES technology was used to examine changes in S speciation in the sediments collected from Taihu Lake, Qinghai Lake, Dianchi Lake, Caohai Lake, and Hongfeng Lake located in distinct geological background areas of China. The results showed that sedimentary S in Qinghai Lake has a high proportion of sulfate averaged 88.9% due to physical weathering of watershed rocks, while deposited S in Taihu Lake has a high fraction of intermediate S (36.5%), which may be the response of the agricultural nonpoint source pollution in drainage basin. …”
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Experimental and Theoretical Investigation of Overburden Failure Law of Fully Mechanized Work Face in Steep Coal Seam by Ze Liao, Tao Feng, Weijian Yu, Genshui Wu, Ke Li

“…By establishing the mechanical model of inclined rock beam, the deflection equation of overlying strata beam is obtained. Based on the geological conditions of Xiangyong coal mine in Hunan Province of China, the laws of roof deformation and failure in steep coal seam are obtained by similar simulation experiments. …”
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Correlating Measured SPT-N, Shear Wave Velocity and Liquid Limit Values in Melekli Region, Igdır (Türkiye) by Yusuf Guzel

“…This can be attributed to the uniqueness of correlation to the study site as geological conditions at one site differ extensively from another site. …”
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Risk assessment of gently inclined mudstone bedding slope incorporating monitoring information by Mingzhou Bai, Ling Yang, Lixuan Liu, Wanxue Long, Yiming Xiang

“…Based on the analysis of instability failure modes and influencing factors for gently inclined mudstone bedding highway slopes during the operation period, topography and geomorphology, geological conditions, natural inducements and slope deformation are selected as the evaluation indices, and the corresponding criteria of risk assessment system are established. …”
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Numerical Simulation and Optimization Design of End-Suspended Pile Support for Soil-Rock Composite Foundation Pit by Qingchao Xu, Zhenhao Bao, Tu Lu, Huarui Gao, Jiakang Song

“…Results show the following: (1) Rock-socketed depths have boundary effect on end-suspended piles. Under the given geological conditions, the reasonable socketed ratio is within 0.158∼0.200. (2) The anchor cable prestress can effectively slow down the ground settlement, the force, and deformation of the pile body and can be set to 1P∼1.25P under the conditions of the site. (3) Rock-shoulder width has little influence on the ground settlement and horizontal displacement of piles. …”
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Research on the Obstruction Process of Rigid Netting Barriers toward Granular Flow by Yunyun Fan, Fengyuan Wu

“…With the advantages of a simple structure and rapid construction, the rigid netting barrier (RNB) exerts a good obstruction effect on granular flow and is a common engineering measure used to prevent geological disasters in the form of granular flows. …”
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A New Method for the Measurement of Gas Pressure in Water-Bearing Coal Seams and Its Application by Xiao Cui, Jiayong Zhang, Liwen Guo, Xuemin Gong

“…Coal seam gas pressure is one of the fundamental parameters used to assess coal seam gas occurrence and is an important index in assessing the risk of gas disaster. However, the geological characteristics of coal seams become increasingly complex with increasing mining degree, thus decreasing the accuracy and success rate of direct methods for measuring gas pressure. …”
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General Design Layout of Datengxia Ship Lock by LI Yawen, CHEN Guihua

“…The Datengxia hydro project is a key project to open the 100-million-ton golden waterway of the Xijiang River,with high navigation requirements for the dam-site reach and a huge freight volume.The general design layout of the navigation structure ship lock plays a vital role in the layout scheme,freight volume,operation management,and investment of the whole hydro project.For the general design of the ship lock, the position of the ship lock is first selected according to the topographical and geological conditions of the project area and the layout requirements of the hydro project.On this basis,this study designs the lock head,lock chamber,water conveyance system,upstream and downstream approach channels,entrance area and connecting section,anchorage to be locked,etc.Additionally,the structural dimensions of the water conveyance system and rectification measures in the entrance area are optimized according to the model test results.The Datengxia ship lock has reached the highest level of ship locks built at home and abroad in terms of the scale,water head,water-level variation amplitude conditions,and hydraulic index requirements.Its general layout can provide a certain reference for the design of large-scale and high water-head ship locks.…”
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Study on Influence of Joint Distribution on Surrounding Rock Failure of an Underground Tunnel by Wanrong Liu, Chao Peng, Baoliang Zhang

“…Due to geological structure and artificial disturbance, a large number of joints and fissures are formed in the surrounding rock of an underground tunnel. …”
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Study on Surrounding Rock Stability Mechanism of Gob-Side Entry Retaining with Prefabricated Fracture by Hao Wu, Chuanqu Zhu, Qingfeng Li

“…To study the optimal layout of prefabricated roof cutting line in gob-side entry retaining with roof cutting and pressure relief, based on the engineering geological conditions of 5249 working face in Beipingdong Coal Mine of Baoyuan Mining Company, the FLAC3D numerical simulation method was used to study the surrounding rock characteristics of gob-side entry retaining under different layout conditions of prefabricated roof cutting line, and the optimal layout of prefabricated roof cutting line in gob-side entry retaining with roof cutting and pressure relief was proposed. …”
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Structure Diversity and Properties of Some Bola-like Natural Products by Valentin A. Stonik, Tatyana N. Makarieva, Larisa K. Shubina, Alla G. Guzii, Natalia V. Ivanchina

“…The recent identification of new enzymes, taking part in their biosynthesis and metabolism, made it possible to understand molecular aspects of their origination and some features of evolution during geological times. The promising properties of these metabolites, such as their ability to self-assemble and stabilize biological or artificial membranes, and biological activities, attract additional attention to them.…”
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Seismic Imaging and Seismicity Analysis in Beijing-Tianjin-Tangshan Region by Xiangwei Yu, Wenbo Zhang, Yun-tai Chen

“…The inferred velocity model of the upper crust correlates well with the surface geological and topographic features in the BTT region. …”
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Systematic Performance Evaluation of Shield TBM Cutters for Excavating Multiple Soft Rock by Chuyuan Cao, Kui Zhang

“…In this novel method, by comparing with their expected best value and the corresponding unacceptable limit, all of the selected performance parameters can be synthesized to assess the proximity of the overall merit of each cutter with respect to all the performances considered under all possible geological conditions. Performance indexes including cutting efficiency, structural strength, wear life, and dynamic response were individually analyzed based on linear cutting tests, finite element analyses, and theoretical calculations. …”
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Numerical Analysis for the Caving Characteristics of Rock Mass with Inclined Joints in Caving Mining by Jinbo Sui, Fengyu Ren, Jianli Cao, Huan Liu

“…Second, model parameters were determined based on the geological conditions of the mine, and seven models were established. …”
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