Journal of Geophysics and Engineering最新文献_第6页

The comparative analysis of the Ex and Hz fields sensitivity generated by electric dipole sources 电偶极源产生的 Ex 和 Hz 场灵敏度的比较分析

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-02-01 DOI: 10.1093/jge/gxae018

XianXiang Wang, Jiaqi Li, Songda Lei

{"title":"The comparative analysis of the Ex and Hz fields sensitivity generated by electric dipole sources","authors":"XianXiang Wang, Jiaqi Li, Songda Lei","doi":"10.1093/jge/gxae018","DOIUrl":"https://doi.org/10.1093/jge/gxae018","url":null,"abstract":"\u0000 In the CSAMT method, orthogonal electric and magnetic fields are commonly measured to determine the Cagniard apparent resistivity. However, in the near-field zone, the Cagniard resistivity is severely distorted, which is unrelated to underground structures. The Ex and Hz amplitudes in a homogeneous half-space monotonically vary in resistivity, and a numerical algorithm could achieve high-precision apparent resistivity without distortion for all frequencies. On this basis, the main focus of this investigation is on the comparative analysis of the sensitivity for the Ex field, Hz field, and Cagniard apparent resistivity to conductive and resistivity targets via synthetic models. The achieved results confirm that the Ex field could exhibit a more enhanced sensitivity for the resistive objects, while the Hz field could more effectively identify the conductive target. Besides, the static effect often distorts the electromagnetic data, which rigorously influences their application. The influence of the static effect on both the Ex and Hz fields is also examined in detail. The apparent resistivity based on the Ex field and Cagniard apparent resistivity is significantly affected by the static effect, which can mask deep anomalous blocks. However, the apparent resistivity based on the Hz field is almost unaffected by the static effect. Finally, a more efficient observation approach is provided for both the insulating and conductive targets.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139889252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The comparative analysis of the Ex and Hz fields sensitivity generated by electric dipole sources 电偶极源产生的 Ex 和 Hz 场灵敏度的比较分析

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-02-01 DOI: 10.1093/jge/gxae018

XianXiang Wang, Jiaqi Li, Songda Lei

{"title":"The comparative analysis of the Ex and Hz fields sensitivity generated by electric dipole sources","authors":"XianXiang Wang, Jiaqi Li, Songda Lei","doi":"10.1093/jge/gxae018","DOIUrl":"https://doi.org/10.1093/jge/gxae018","url":null,"abstract":"\u0000 In the CSAMT method, orthogonal electric and magnetic fields are commonly measured to determine the Cagniard apparent resistivity. However, in the near-field zone, the Cagniard resistivity is severely distorted, which is unrelated to underground structures. The Ex and Hz amplitudes in a homogeneous half-space monotonically vary in resistivity, and a numerical algorithm could achieve high-precision apparent resistivity without distortion for all frequencies. On this basis, the main focus of this investigation is on the comparative analysis of the sensitivity for the Ex field, Hz field, and Cagniard apparent resistivity to conductive and resistivity targets via synthetic models. The achieved results confirm that the Ex field could exhibit a more enhanced sensitivity for the resistive objects, while the Hz field could more effectively identify the conductive target. Besides, the static effect often distorts the electromagnetic data, which rigorously influences their application. The influence of the static effect on both the Ex and Hz fields is also examined in detail. The apparent resistivity based on the Ex field and Cagniard apparent resistivity is significantly affected by the static effect, which can mask deep anomalous blocks. However, the apparent resistivity based on the Hz field is almost unaffected by the static effect. Finally, a more efficient observation approach is provided for both the insulating and conductive targets.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139829257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D seismic intelligent prediction of fault-controlled fractured-vuggy reservoirs in carbonate reservoirs based on deep learning method 基于深度学习方法的三维地震智能预测碳酸盐岩储层中的断层控制断裂-岩浆储层

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-30 DOI: 10.1093/jge/gxae005

Zongjie Li, Haiying Li, Jun Liu, Guangxiao Deng, Hanming Gu, Zhe Yan

{"title":"3D seismic intelligent prediction of fault-controlled fractured-vuggy reservoirs in carbonate reservoirs based on deep learning method","authors":"Zongjie Li, Haiying Li, Jun Liu, Guangxiao Deng, Hanming Gu, Zhe Yan","doi":"10.1093/jge/gxae005","DOIUrl":"https://doi.org/10.1093/jge/gxae005","url":null,"abstract":"\u0000 Accurately predicting the external morphology and internal structure of fractured-vuggy reservoirs is of significant importance for the exploration and development of carbonate oil and gas reservoirs. Conventional seismic prediction methods suffer from serious non-uniqueness and low efficiency, while recent advances in deep learning exhibit strong feature learning capabilities and high generalization. Therefore, this paper proposes an intelligent prediction technique for fault-controlled fracture-vuggy reservoirs based on deep learning methods. The approach involves constructing 3D seismic geological models that conform to the geological characteristics of the study area, simulating seismic wavefield propagation, and combining the interpretation results of fractured-vuggy reservoirs. Training sample datasets are separately established for strike-slip faults, karst caves, and fault-controlled fractured-vuggy reservoir outlines, which are then input into the U-Net model in batches for training. This leads to the creation of a deep learning network model for fault-controlled fractured-vuggy reservoirs. The trained network model is applied to the intelligent identification of fault, karst cave, and fault-controlled fracture-vuggy reservoir outlines using actual seismic data from the Shunbei area. A comparison with traditional methods is conducted, and the experimental results demonstrate that the proposed deep learning approach shows excellent performance in the identification and prediction of fault-controlled fractured-vuggy reservoirs.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140483080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of temperature and fluid on rock microstructure based on an effective medium theory 基于有效介质理论的温度和流体对岩石微观结构的影响

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-27 DOI: 10.1093/jge/gxae014

Hesong Zhu, J. Ba, Lin Zhang, J. Carcione, Xinfei Yan

{"title":"Effect of temperature and fluid on rock microstructure based on an effective medium theory","authors":"Hesong Zhu, J. Ba, Lin Zhang, J. Carcione, Xinfei Yan","doi":"10.1093/jge/gxae014","DOIUrl":"https://doi.org/10.1093/jge/gxae014","url":null,"abstract":"\u0000 Temperature and pressure variations during the geologic diagenesis process can lead to the complex pore structures in tight rocks. The effective medium theory, based on the stress-strain relationship in combination with pore structure parameters, can be used to describe the elastic wave responses of rocks. In this work, the differential effective medium (DEM) and self-consistent approximation (SCA) models are combined to invert the pore crack spectrum. The Voigt-Reuss-Hill (VRH) average is used to estimate the elastic moduli of the minerals. Then, based on SCA, the pore structures are incorporated into the rock matrix to create a new host phase. Subsequently, the DEM theory is used to add cracks with different volume fractions and aspect ratios to the host phase. To predict the structure of pores and cracks (crack density and aspect ratio), an objective function is defined as the sum of variances between experimentally measured and predicted wave velocities. The results show that the modeling predictions of P- and S-wave velocities at different temperatures and pressure ratios agree well with the experimental measurements. Variations in pore structure are determined at a zero effective pressure and different temperatures. We analyze the characteristics of how cracks change with variations in temperature and confining pressure, providing a theoretical basis for characterizing the structure of tight rocks.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139592582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An effective Q extraction method via deep learning 通过深度学习的有效 Q 提取方法

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-27 DOI: 10.1093/jge/gxae011

Fang Li, Zhenzhen Yu, Jianwei Ma

{"title":"An effective Q extraction method via deep learning","authors":"Fang Li, Zhenzhen Yu, Jianwei Ma","doi":"10.1093/jge/gxae011","DOIUrl":"https://doi.org/10.1093/jge/gxae011","url":null,"abstract":"\u0000 Quality factor (Q) is a parameter reflecting the physical properties of reservoirs. Accurate estimation of the quality factor plays an important role in improving the resolution of seismic data. Spectral ratio method is a widely-used traditional method based on the linear least squares fitting to extract the quality factor, but is sensitive to noise. This is the main reason preventing this method from being widely used. Some supervised deep learning methods are proposed to extract Q, in which the construction of training labels is a key link. The proposed method is based on the spectral ratio method to create training labels, avoiding errors in generating them. In contrast to the least squares method, this paper proposes to use a nonlinear regression algorithm based on a fully connected network to fit the spectral logarithmic ratio and frequency. Meanwhile, the empirical equation is applied to constrain prediction results. The proposed method can effectively overcome the influence of noise and improve the accuracy of prediction results. Tests on the synthesized data of vertical seismic profile and common middle profile show that the proposed method has better generalization ability than the spectral ratio method. Applying the method to the field vertical seismic profile data successfully extracts the quality factor, which can provide effective information for dividing stratigraphic layers.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139592750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping of geological structures and sediment thickness from analysis of aeromagnetic data over the Obudu Basement Complex of Nigeria 通过分析尼日利亚奥布都基底复合体上空的航磁数据绘制地质结构图和沉积厚度图

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-27 DOI: 10.1093/jge/gxae012

Stephen E. Ekwok, Ahmed M Eldosuoky, Edward A Thompson, Romeo A Ojong, Anthony M. George, Saad S. Alarifi, S. Kharbish, Peter Andráš, A. E. Akpan

{"title":"Mapping of geological structures and sediment thickness from analysis of aeromagnetic data over the Obudu Basement Complex of Nigeria","authors":"Stephen E. Ekwok, Ahmed M Eldosuoky, Edward A Thompson, Romeo A Ojong, Anthony M. George, Saad S. Alarifi, S. Kharbish, Peter Andráš, A. E. Akpan","doi":"10.1093/jge/gxae012","DOIUrl":"https://doi.org/10.1093/jge/gxae012","url":null,"abstract":"\u0000 In this study, geologic structures as well as attendant orientations, and sediment thickness in the Nigerian Obudu Complex, were delineated using the Centre for Exploration Targeting (CET), and depth determination methods like source parameter imaging (SPI) and standard Euler deconvolution (SED). The CET, SPI and SED procedures were applied on the total magnetic intensity (TMI) data. Also, the enhanced TMI data using analytic signal (ASIG), first-vertical derivative (FVD), total-horizontal derivative (THD), and tilt-angle derivative (TDR) filters were further subjected to CET operation, with the aim of mapping both subtle and prominent lineaments. In general, mapped geologic structures trends in the NE-SW, NNE-SSW, E-W, and N-S directions. Overall, the dominant geologic structural orientations of NE-SW and NNE-SSW reflect the regional strike orientation. The regional striking of the lineation, which is caused by the Pan-African orogeny and subsequent post-orogenic processes, has an impact on these orientations. The N-S and E-W structural deviations from the main NE-SW and NNE-SSW trends are initiated by the YGS of the post-orogenic events. Overall, these complex geologic structures are probable sites for metallogenic minerals.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139592705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fine characterization of interbedding sand-mudstone based on waveform indication inversion 基于波形指示反演的砂泥岩互层精细表征

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-24 DOI: 10.1093/jge/gxae010

Suzhen Shi, Weixu Gao, Teng Long, Dongshan Xie, Li Li, Jinbo Pei, Jianchao Cai

{"title":"Fine characterization of interbedding sand-mudstone based on waveform indication inversion","authors":"Suzhen Shi, Weixu Gao, Teng Long, Dongshan Xie, Li Li, Jinbo Pei, Jianchao Cai","doi":"10.1093/jge/gxae010","DOIUrl":"https://doi.org/10.1093/jge/gxae010","url":null,"abstract":"\u0000 Owing to the increasing challenges associated with coal mine exploration and development, extremely precise surveys with high-resolution images are required to support production. Conventional inversion methods cannot provide sufficiently precise images of the complex lithologies in coal measure strata. Accordingly, this study performed the research in Qiyuan mining area, Shanxi Province, China, and predicted the complex lithology on the bases of facies control using waveform indication inversion and waveform indication simulation. Horizontal changes in seismic waveforms were used to reflect lithologic assemblage characteristics for facies-controlled constraints, and the vertical mapping the connection between seismic waveform and logging curves was shown. Moreover, high-resolution inversions of wave impedance and natural gamma parameters were conducted. Combined with lithologic shielding and accurate time-depth conversion, the inversions enabled the precise characterisation of the lithological assemblage distribution in the study area. Our results showed that waveform indication inversion could distinguish between coal seams and limestone while waveform indication simulation based on natural gamma could effectively distinguish between sandstone and mudstone. Furthermore, the horizontal resolution was improved while the vertical resolution extended to a thickness of 2–3 m. In addition, the inversion results were highly consistent with drilling results, with an error less than 0.1 m. Therefore, waveform indication inversion and simulation could be applied to coal mines for safe and efficient production.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139602445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel fluid identification method based on a high-precision spectral decomposition method 基于高精度光谱分解法的新型流体识别方法

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-24 DOI: 10.1093/jge/gxae007

Fawei Miao, Yanxiao He, Shangxu Wang, Handong Huang

{"title":"A novel fluid identification method based on a high-precision spectral decomposition method","authors":"Fawei Miao, Yanxiao He, Shangxu Wang, Handong Huang","doi":"10.1093/jge/gxae007","DOIUrl":"https://doi.org/10.1093/jge/gxae007","url":null,"abstract":"\u0000 Time-frequency decomposition technology is an effective tool to analyze non-stationary signals. Improving resolution of spectral decomposition techniques is important to extract more useful information from the received signal. Wigner-Ville distribution (WVD) has been widely applied in seismic signal analysis, it can better analyzes seismic signals due to many excellent mathematical properties, but this method has a drawback that cross terms interference exists in the analyzing of multi-component signals, which severely limits its application. The combination of the complex domain matching-pursuit (CDMP) with this approach effectively solves this problem. However, the conventional CDMP-WVD does not take the influence of the scale parameter on the Morlet wavelet waveform into account, which reduces the time-frequency resolution of CDMP-WVD. Therefore, in order to correct the defect that the atomic waveforms change only with the frequency parameter, we propose an improved spectral decomposition method ICDMP-WVD that considers the scale parameter. In this study, we first analyze influences of the scale parameter on Morlet wavelet waveform and make the scale parameter as search parameter, that improves the computational efficiency and time-frequency resolution of the traditional CDMP-WVD method. Accordingly, the seismic dispersion-dependent attributes are calculated via combing the improved CDMP-WVD algorithm and the frequency-dependent AVO inversion. We adopt a two-step frequency-dependent AVO inversion method to improve the stability of the conventional frequency-dependent AVO inversion. Theoretical data and real data application show that the approach in this study can identify gas reservoirs efficiently and accurately.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139602114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crustal structure of the southern Lower Yangtze region and its geological implications: a deep reflection seismic profile 长江下游南部地区的地壳结构及其地质影响：深反射地震剖面图

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-22 DOI: 10.1093/jge/gxae006

Penghui Zhang, Tong Wang, Guangcai Li, Jianxun Liu, Hui Fang, Pei Li, Hongkui Li

{"title":"Crustal structure of the southern Lower Yangtze region and its geological implications: a deep reflection seismic profile","authors":"Penghui Zhang, Tong Wang, Guangcai Li, Jianxun Liu, Hui Fang, Pei Li, Hongkui Li","doi":"10.1093/jge/gxae006","DOIUrl":"https://doi.org/10.1093/jge/gxae006","url":null,"abstract":"\u0000 The southern part of the Lower Yangtze, located in the area bounded by the Jiangnan and Dabie orogenic belts, is characterised by a complex fault structure and unique magmatism, and is one of the key areas in regional tectonic evolution and magmatism. In this study the authors used a 45-km-long deep reflection seismic profile to study the crustal structure of the southern Lower Yangtze. The results show that the crust in the study area is about 31.5∼33.6 km thick, with the Huaining Basin as the thinnest part. A detachment surface at a depth of around 12 km divides the crust into the upper and lower crust, act as a key tectonic decoupling layer. Two sets of thrust nappe faults with opposite tendencies have horizontally developed above the detachment surface, with the Huaining Basin as the centre. A typical wedge-shaped structure has developed below the Qianshan Basin, suggesting that two sets of thrust nappe faults may have formed in the same dynamic system. The reflection patterns of the lower crust on both sides of the profile exhibit a monoclinic feature with opposite tendencies, while the lower part of the Huaining Basin exhibits an arcuate upward-arch feature. A prominent ductile shear zone in the lower crust has developed on the west side of the Huaining Basin, which can provide a favourable channel for magma migration. The results of this study deepen our understanding of the deep structure of the Lower Yangtze Region, and provide important constraint data for research on dynamic mechanisms.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139606250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of non-hydrophilic similar materials for weakly cemented rocks and its experimental application in water conservation mining 弱胶结岩非亲水性相似材料的开发及其在节水采矿中的试验应用

IF 1.4 3区地球科学

Journal of Geophysics and Engineering Pub Date : 2024-01-16 DOI: 10.1093/jge/gxae009

Qingheng Gu, Minjie Qi, Guangming Zhao, Qing Ma, Weiyao Guo, Wenlong Lu

{"title":"Development of non-hydrophilic similar materials for weakly cemented rocks and its experimental application in water conservation mining","authors":"Qingheng Gu, Minjie Qi, Guangming Zhao, Qing Ma, Weiyao Guo, Wenlong Lu","doi":"10.1093/jge/gxae009","DOIUrl":"https://doi.org/10.1093/jge/gxae009","url":null,"abstract":"\u0000 The mining of coal mines in western China needs to focus on protecting groundwater. A non-hydrophilic similar material for simulating the development and hydraulic conductivity of weakly cemented overlying strata fractures was developed. Fine sand, coarse sand, and gypsum are used as aggregates. Paraffin and vaseline are used as binders. The non-hydrophilic material ratios of weakly cemented sandy mudstone and medium-grained sandstone were determined by orthogonal experiments, and used for similar simulation tests. The results show that the non-hydrophilicity of rock-like materials can be adjusted to prevent them from softening and collapsing under the action of water. Non-hydrophilic materials of higher strength and brittleness of rocks can be achieved by adjusting the content of paraffin, fine sand, and gypsum. The non-hydrophilic materials of soft and large particle rocks can be achieved by adjusting the content of paraffin, fine sand, and gypsum. After the coal seam in the similar simulation experiment was extracted, the large area of weakly cemented rock above it undergoes overall settlement and fracture. Although this part is located within the failure zone, there is no macroscopic water conducting cracks generated. The height of the water conducting fracture zone was lower than the height of the fracture zone classified by the traditional ‘three zone’ theory, which is consistent with the on-site measurements. This indicates that the prepared non-hydrophilic material is reliable. The similarity simulation method based on non-hydrophilic materials can enrich the means for studying the fracture and permeability of weakly cemented overlying rocks in coal mines.","PeriodicalId":54820,"journal":{"name":"Journal of Geophysics and Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139527890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0