Abstract:With the development and utilization of coal resources,the original exploration resources are fa-cing exhaustion,and the traditional 3d seismic exploration methods are gradually not in line with the cur-rent green exploration standards.A new geophysical technique based on resonant imaging of natural back-ground noise has become a new hotspot and highlight in seismology,and has been widely used in the study of crust-mantle structure characteristics,anisotropy and continental dynamics..This paper employs nat-ural source seismic resonance imaging technology to investigate a coal mine in the Shandong Luxi region.By measuring the natural source seismic amplitude spectrum at the surface,we extracted wave field trans-fer functions related to geological parameters,and inverted to calculate the wave impedance parameters of geological bodies.Consequently,we established velocity and density models of the subsurface medium,which allowed us to clarify the location and spatial distribution of coal seams and faults based on the physi-cal property differences of the geological bodies.

Abstract:Looking back on the century long struggle history of geology,in order to inherit the spirit of"three honors"and"four special"in geology,we showcase representative important geological achieve-ments and main development laws in time and space domains,promote the development of geological sci-ence and technology and the growth of geological exploration teams,better perform geological exploration and storage,serve ecological civilization construction,and demonstrate the effectiveness of public welfare attributes.The seismic exploration technology in the coal mining areas of Shandong Province has continu-ously improved from 2D to 3D to high-density 3D,from solving structural problems to solving litholog-ical problems,from coal fields to rock salt mines and metal mines,and other fields.The technological lev-el has been continuously improved,and the technical equipment has received 48 channels to 10000 channels or even infinite channels,achieving exponential growth in information collection.The ability of seismic ex-ploration to solve geological problems has significantly improved,at the intersection of geological history for a century,Seismic exploration will carry forward the past and embark on a new journey,providing greater geological support for safe and efficient production in mines.

Abstract:The development of seismic exploration technology is based on the continuous development of seismic instruments.With electronic devices,computer technology and sensing technology,the develop-ment of communication technology,data storage,and process technology,seismic and geophysical instru-ments are also constantly being updated and upgraded.This article describes the development process of seismic exploration equipment in Shandong Province from the first generation to the sixth generation from the perspective of the seismic exploration development of the Shandong Coalfield Geophysical Exploration Team.The development of seismic exploration instruments is of great significance for improving the accu-racy of seismic exploration.

Abstract:The use of conventional geophysical exploration methods is restricted by complex interference in urban areas.This study employed the three-component microtremor H/V spectral ratio method,which has strong adaptability to environmental conditions and anti-interference ability,for geophysical explora-tion in urban environments.Firstly,the study identified the impact of high and low-frequency abnormal signals of the microtremor H/V spectral ratio method under regular interference sources.Then,the study analyzed the effectiveness of this method in detecting common targets in urban areas,such as dams,under-ground artificial structures,tunnels,soil-rock interfaces,tectonic fault zones,and lithological bounda-ries.The results show that the microtremor H/V spectral ratio method is ideal for detecting layer struc-tures such as soil-rock interfaces,dam tops and bottoms,as well as targets with significant differences in wave impedance such as cement water supply culverts,sewage pipes,and fractured zones.However,in detecting underground cavities such as tunnels in bedrock excavation,although the method can roughly re-flect the position of the roof,the response to the boundary is not clear enough.These research results in-dicate that the three-component microtremor H/V spectral ratio method has great potential for applica-tion in urban geological environments but further improvement and development are still required.

Abstract:Coal mine goaf is a hidden,complex,large surface deformation range and easy to cause geolog-ical disasters,which is very harmful to ground engineering construction.The problem of coal mine goaf is a worldwide problem.Taking the site survey of a coal mine in Zhangqiu as an example,the comprehensive survey methods such as ground survey,comprehensive geophysical exploration and drilling are adopted.The working methods complement and coordinate each other,which improves the survey accuracy of coal mine and achieves good application effect.This paper has certain reference significance for the investigation of coal mine goaf under similar geological conditions.

Abstract:Ordovician and Cambrian limestone is widely developed in northern Jiangsu and central and southern Shandong,which is a typical area of karst development in the northern China.Since the 1980s,with the rapid development of urbanization,the over-exploitation of groundwater the significant changes in the groundwater level couple with human activities,mechanical activities and many other reasons,the problem of karst collapse geological disasters has become increasingly prominent,which has become an im-portant factor restricting urban development.kKarst collapse has become an important factor restricting urban development.How to detect karst in a complex urban environment become an urgent problem to be solved at this stage,so a variety of geophysical methods have been studied in Jinan,Tai'an,Linyi,Xuzhou and other places to analyze suitable methods for karst detection in northern Jiangsu and central and southern Luzhou.The results show that compared with the surrounding rock,karst in northern Jiangsu and central and southern Lu has the physical characteristics of low density and low speed,and the karst filled with water or clay also has low resistivity characteristics.The shallow seismic method has a large de-tection depth and sensitive karst response,but the karst boundary is difficult to determine.The high-density electric method has good karst effect on water-filled or filled clay,and the resolution of micro-motion and transient electromagnetic method is high,which can depict karst boundaries,cross-hole CT accuracy is high,and the boundary is clearly described,but the detection cost is high.At the same time,the multi-solution of a single detection method is high,and multiple geophysical methods are mutually re-stricted,which can reduce the multi-solution of interpretation,realize the fine detection of karst,and provide technical support for karst evaluation and treatment.

Abstract:In order to identify the scope of geological hazards such as ground subsidence,subsidence,and ground fissures,two geophysical methods,high-density electrical method and micro motion detection were selected for exploration.The field observation data were preprocessed and inverted to produce apparent resistivity isopleth sec-tions and apparent shear wave velocity sections.Based on the geophysical results,anomalies were delineated.By integrating the delineated geophysical anomalies with geological survey results and previous geological data around the working area,the surface distribution range and depth of damage in the ground deformation area within the working area are inferred.

Abstract:This article mainly uses controllable source audio magnetotelluric sounding method and field Construction Method Design for the Northeastern Region of Jinan.At the same time,it also highlights the effects of different static correction methods.Finally,the integral translation method is used for multiple corrections to eliminate static effects.This laid the foundation for accurately predicting the distribution of geothermal energy.Based on the data obtained from the above processing inversion and combined with ex-isting geophysical data from the study area,this study also incorporates magnetotelluric and helium meas-urements,to establish the correspondence between the electrical layer and the stratum and electrically measured electrical anomalies and geological structures as a whole.Structural interpretation of the regional faults found in the work area,accurately determine the buried depth of the Ordovician limestone roof and the distribution of geothermal target areas.Drill verification results show,the geophysical results inferred from this geophysical exploration work are basically consistent with the actual formation conditions and the depth and location of actual geothermal resources are more consistent with geophysical anomalies.Compar-ison between electrical anomalies(corresponding faults)and anomalies in helium distribution helps to im-prove prediction accuracy of geothermal distributionand to reduce multiplicity.This program provides a new high-precision prediction method for geothermal exploration forecasting resources.

Abstract:This paper provides a brief overview of the development of high-density 3D seismic exploration technology and summarizes the key parameters applicable to the characteristics of coalfields.High density 3D seismic exploration uses smaller sampling intervals,higher coverage times,wide azimuth,and single point reception of digital detectors compared to conventional 3D,achieving sufficient and uniform sampling of effective reflection signals and noise in the target layer.It can identify small faults,smaller collapse col-umns,etc.,and is receiving increasing attention.However,seismic exploration is a systematic engineer-ing and it cannot be simply assumed that the goal and requirements of high-precision exploration can be a-chieved by using high-density 3D technology.All aspects must be scientifically demonstrated,carefully organized,and interpreted to ensure the high accuracy of exploration results.

Abstract:There are great environmental safety risks of the old landfill sites in history,which pose serious threats to urban ecological environmental safety and will affect economic and social sustainable develop-ment of our country.This paper takes an industrial waste landfill site as the research object and studies the general depth of diving layer and the distribution of fault structure in the field by combining remote sensing with geophysical methods.It deduces the boundary,depth and scope of the hazardous waste landfill pools,estimate the volume of waste deposited,and evaluate issues related to potential leachate leakage.Through case studies,the application effectiveness of remote sensing technology and high-density electrical meth-ods in surveying landfill boundaries and scales is demonstrated.The integration of geophysical methods with RS technology provides a rapid,efficient,and accurate scientific reference for landfill site investiga-tions.

Abstract:In view of the low efficiency and high cost of traditional methods in expansive soil distribution exploration,the resistivity sounding combined with drilling verification was used to study and apply the expansive soil distribution near Ziyang Mountain area in southwest Shandong province.The results show that the original curve of apparent resistivity of expansive soil distribution is generally H-type or HK type.In the one-dimensional inversion resistivity model of resistivity sounding,the resistivity value of expansive soil is generally 12～15Ω·m,which is different from the resistivity value of sandy clay and me-dium fine sand.The measured resistivity sounding data in the study area were interpreted and analyzed by geophysical exploration,and the three-dimensional distribution characteristics of expansive soil were fi-nally obtained.The coincidence rate of geophysical inference and interpretation results with drilling verifi-cation and disclosure reached more than 70％.Resistivity sounding is rarely used in expansive soil distribu-tion exploration.This method can be popularized and used for reference in the related work of expansive soil distribution exploration.

Abstract:As one of the main hazards affecting the safety production of mines at present,goaf poses signifi-cant safety risks.In order to seek effective methods for goaf exploration and verify the application effect of multiple geophysical methods in goaf exploration,experiments were conducted on geophysical methods.After comparing the experimental results of various geophysical methods,high-density resistivity method and transient electromagnetic method were selected to conduct experimental profiles and drilling verifica-tion work in two experimental areas.The results indicate that these two geophysical methods have good application effects in the exploration of goaf in metal mines.The high-density resistivity method is better applied in the exploration of shallow goaf,while the transient electromagnetic method has high resolution for low resistance water filled goaf.

Abstract:This study employs ultra-high density electrical method and ground micromotion detection method as comprehensive geophysical exploration methods..Specifically,it can distinguish different geo-logical bodies and the development of fractures and faults by analyzing dielectric electrical property differ-ence and shear wave velocity difference of concealed rocks.These two methods were used to survey the landslide area in the exploration area,and the longitudinal and lateral development and distribution of the landslide body were obtained by interpreting the ultra-high density electrical profile and ground motion detection profile,and the spatial morphological characteristics of the landslide body,the buried depth of the sliding surface and the faults related to the development of the landslide were found out.

Abstract:Geophysical exploration technology is one of the essential technical means of hydrogeological in-vestigation and plays an irreplaceable role in obtaining geological information,such as stratigraphic struc-ture and geological structure.In general,the magmatic rock area has poor water richness,so it is necessa-ry to adopt more reasonable geophysical exploration technology to complete the underground water source exploration.In this paper In this paper,a combined geophysical exploration model utilizing microtremor methods and Controlled Source Audio Magnetotellurics(CSAMT)is employed to investigate the granite formations within the study area,allowing for the acquisition of seismic wave velocity and resistivity pa-rameters.The practice has proved that the two approaches are effective in interpreting stratigraphic struc-ture and water-bearing structure and have better complementarity in geological interpretation.Based on the results of the geophysical interpretation,hydrological analysis revealed a high-quality water source with a single well yielding up to 291.54 m3/d within the study area.,which not only solved the actual wa-ter demand of the local area,but also provided a certain reference for groundwater exploration in this kind of area in the future.

Abstract:Sand extraction and backfilling areas are characterized by discontinuous distribution,uneven backfills and under-compactness,which not only seriously affect groundwater recharge and destroy eco-logical environment,but also bring troubles to engineering geological investigation.Because it is difficult to carry out comprehensive and effective survey on sand mining backfill area only by drilling method,the distribution and variation characteristics of sand mining backfill area can be comprehensively obtained by selecting effective geophysical method from line to surface.This paper takes the backfilling area of sand mining along Linyi River in Shandong Province as the research object,carries out investigation for typical backfilling area of sand mining,employs geophysical prospecting method combined with high density resis-tivity method and seismic imaging method,lays out measuring lines in a network,obtains resistivity inver-sion section and waveform section of strata in the measuring area,and combines strata structure,hydro engineering geological characteristics of the research area,etc.This paper mainly studies the influence of sand mining Backfilling on formation electrical characteristics and waveform continuity,and accurately find out burial depth and spatial distribution pattern of sand mining backfilling area by drilling.This method combination provides a certain reference for similar exploration work and provides a rich exploration basis for engineering construction.

Abstract:With the operation of the Three Gorges Reservoir,anti-collision facilities have been widely implementedin bridge engineering across the reservoir area,However,adversely affected by clustered floating debris impacts with the secondary disasters caused by strong earthquakes are often an primary source of floating debris.Based on the analysis of material composition of floating debris in the reservoir area,this study reveals the formation mechanism of reservoir floating objects.Influenced by river currents and navigation-induced wind and waves,floating debris tends to accumulate at anti-collision facilities,which can have detrimental effects on their performance.The mechanical effects of clustered floating debris on anti-collision guide-wells and bumpers were analyzed using the finite element method.The results indicate that under the pushing loads generated by small and medium-sized clusters of floating objects,the guidewells?and bumpers experience only minor localized deformations.However,significant localized pressure is observed on the buoys and limiters,posing a risk of deformation failure that aligns with the damage characteristics observed in situ.Considering the characteristics of bridge anti-collision facilities,this study innovated methods for internal cutting and trawl cleaning of clustered floating debris in anti-collision belts,and proposed improvement measures including establishing additional or new floating debris sluice gates and optimization of curved trash racks.

Abstract:Based on the network review data of TikTok platform,this paper adopts the co-word analysis method to study the public's cognition and demand for earthquake early warning,and puts forward suggestions for popularization of earthquake early warning science.The results show that most of the time nodes for the public to pay attention to"earthquake early warning"are after the occurrence of destructive earthquakes at home and abroad,and the enlightening,valuable information and interesting expressions are more likely to trigger public comments.The hot issues of public concern are the response and disposal after receiving the earthquake early warning signal,how to receive the earthquake early warning signal,why they can receive the earthquake early warning signal and so on.The public's positive evaluation of"earthquake early warning"is strengthening,but the negative evaluation still exists.There are still a lot of doubts about"earthquake early warning".The public puts forward doubts and hopes to get answers and solutions.The public has a wrong understanding of"earthquake early warning"and wants to know more practical knowledge.

Abstract:Based on the topographic and geological data from the artificial lake area near the ground resistivity observation site of Hongge Seismic Station,the three-dimensional seepage numerical model of the artificial lake was established,and the three-dimensional seepage numerical simulation calculation of the artificial lake was carried out.The results show that the groundwater level in the ground resistivity survey area rises significantly after the impoundment of the artificial lake.Combining with the extended Archie's law,by calculating the medium influence coefficient of each layer of the ground resistivity,under the condition of other factors unchanged,the rise of the groundwater level in the survey area will cause the reduction of the resistivity observation data.Thus,the simulation inference result suggests that the impoundment of the artificial lake will cause the reduction of the ground resistivity observation data.The simulation results are consistent with the actual observation results of the ground resistivity,indicating that the impoundment of the artificial lake is one of the reasons for the decline of the ground resistivity observation data at Hongge Seismic Station.

Abstract:Heavy rainfall and human engineering usually induce landslides,collapses and other geological disasters,and then cause serious losses of life and property.In order to reveal the causes of the landslide at the entrance of Nanshan Tunnel on Fenghuangshan Expressway in Xining,Qinghai Province,based on detailed field investigation,we systematically studied the landslide by using engineering geology,soil mechanics and simulation calculation methods.The results show that the main sliding direction of the landslide at the entrance of Nanshan Tunnel is 315°,and the average thickness of the sliding body is about 10.2-15.6 m.The main internal controlling factor is the morphology of the high and steep slope formed by the differential tectonic uplift and subsidence.The low strength of the mudstone and gypsum-salt strata constitutes the material basis for landslide instability.The factors such as precipitation and human engineering influences serve as the inducement for landslide occurrence.The calculation results of the transfer coefficient method for landslide stability demonstrate that this landslide is in an understable-unstable state under natural conditions and an unstable state under conditions of rainstorms or continuous rainfall and earthquakes.

Abstract:The surface displacement of a sudden small-scale accumulation landslide recorded by the global navigation satellite system(GNSS)of a health center in Shixi village,Huangshi City,as well as the rainfall and soil moisture content of this area are used to predict the surface displacement variations of this landslide by using the hybrid model of convolutional neural network(CNN)and long shorterm memory network(LSTM).Initially,CNN model is used to extract features from time-series data,and ReLU activation function is used to introduce nonlinear transformation to improve the expression ability of the model.Then the extracted features are transferred to the LSTM layer for time series modeling,and the output of the LSTM is mapped to the specified output dimension through the full connection layer to complete the landslide surface displacement prediction.The results show that compared to traditional methods and standalone LSTM networks,the CNN-LSTM hybrid model exhibits significant advantages in predicting surface displacement of accumulation layer landslides,achieving substantially improved prediction accuracy.The results can provide scientific insights for early warning and mitigation of landslide hazards in Huangshi area.