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Articles 8821 - 8850 of 109213
Full-Text Articles in Entire DC Network
Verses Of Regret In The Holy Quran; A Grammatical And Semantic Study, Samiah Bint Moammes Asiri
Verses Of Regret In The Holy Quran; A Grammatical And Semantic Study, Samiah Bint Moammes Asiri
UB Journal for Humanities
This study: “Verses of Regret in the Holy Qur’an: A Grammatical and Semantic Study” investigates the structures, vocabulary, and stylistic devices associated with regret in the Qur’an through a descriptive-analytical and inductive approach. It analyzes the grammatical constructions and semantic implications of regret, focusing particularly on eschatological scenes depicting the terrors of the Day of Judgment and the futility of late remorse. The findings indicate that regret extends beyond explicit lexical items, manifesting through diverse structures that derive significance from Qur’anic context and grammatical synergy. Notably, the negated present-tense verb la yanfa‘u (does not avail) underscores the impossibility of undoing …
The Impact Of Variant Transmission In Abū Tammām’S Kitāb Al-Ḥamāsah: The Chapter Of Al-Ḥamāsah As A Case Study, Nawal Abdullah Ibrahim Yusuf Al-Zahrani
The Impact Of Variant Transmission In Abū Tammām’S Kitāb Al-Ḥamāsah: The Chapter Of Al-Ḥamāsah As A Case Study, Nawal Abdullah Ibrahim Yusuf Al-Zahrani
UB Journal for Humanities
This study examines the impact of variant readings in the Hamasa by Abu Tammam, focusing on the Chapter of Valor as an applied model. It is based on the premise that variation in transmission is a textual phenomenon that affects the semantic meaning, syntactic structure, and rhetorical value of the poetic text, rather than being merely superficial lexical variation. The research problem lies in the multiplicity of variant readings, which leads to differences in meaning and interpretation, raising questions about the nature and stability of the poetic text. The study aims to analyze the impact of these variations on …
The Impact Of Literary Reports In The Reception Of Poetic Experience: A Critical Review Of Abi Tammam’S Poem On The Conquest Of Amorium, Ali Bin Muhammad Al-Nomah Al-Qahtani
The Impact Of Literary Reports In The Reception Of Poetic Experience: A Critical Review Of Abi Tammam’S Poem On The Conquest Of Amorium, Ali Bin Muhammad Al-Nomah Al-Qahtani
UB Journal for Humanities
This study critically examines the “The Impact of literary reports” and their adverse of poetic experience dimensions. It uses the story of “the woman’s appeal to al-Muʿtaṣim,” allegedly motivating the conquest of Amorium, as a model for critical deconstruction. Divided into two sections, the first demonstrates the lack of documentary authenticity in “The Historical Report in the Poem on the Conquest of Amorium.” Although a degree of leniency may be exercised in literary narratives, reports casting doubt on artistic or personal integrity warrant careful re-examination regarding their impact on reading the work. The second section focuses on “The Artistic Analysis …
Paragliding The Cliff Edge: Introducing Open Mic Studies. A Creative Response To Navigating The Post-18 Landscape For Young Adults With Send., James Tarling, Charlie Robinson, Nick Hall, Sammy Shepherd
Paragliding The Cliff Edge: Introducing Open Mic Studies. A Creative Response To Navigating The Post-18 Landscape For Young Adults With Send., James Tarling, Charlie Robinson, Nick Hall, Sammy Shepherd
Plymouth Interdisciplinary Education Open Journal
This conceptual article investigates novel ways of thinking about Open Mic Nights (OMN) – performance spaces understood as free, community arts and performance opportunities where the members of the public are welcome to perform music, poetry and comedy in front of an audience. For the purposes of this article, music-related OMN that take place in pubs or community centres are discussed.
The article is intended to be a primer for OMN studies that offers new and emerging trailheads for future research and discussion. Its central focus is how OMN may benefit the Special Educational Needs and Disabilities (SEND) community with …
Grounded Multi-Agent Ai System For Automated Publisher Analysis And Remediation, N/A
Grounded Multi-Agent Ai System For Automated Publisher Analysis And Remediation, N/A
Defensive Publications Series
Digital publishers may face challenges in interpreting complex performance data to identify technical issues or monetization opportunities. The disclosed technology describes a system that can utilize a multi-agent artificial intelligence architecture to ingest and process varied data sources to detect anomalies. An orchestrator agent may delegate analysis to specialized sub-agents, which can use a retrieval-augmented generation engine grounded in a corpus of verifiable data to perform root cause analysis and formulate solutions. The system can present findings in a narrative format and may include an action engine to facilitate remediation, assisting users in converting performance data into actionable strategy and …
Late-Stage Semantic Disambiguation Of Multi-Hypothesis Automatic Speech Recognition In Digital Voice Platforms, Mubaraq Mishra
Late-Stage Semantic Disambiguation Of Multi-Hypothesis Automatic Speech Recognition In Digital Voice Platforms, Mubaraq Mishra
Defensive Publications Series
This publication describes a system and methodology for improving speech recognition accuracy in smart home devices by transitioning from early-stage transcription biasing to late-stage semantic disambiguation. Conventional automatic speech recognition architectures prematurely resolve phonetic ambiguities by selecting only the single highest-ranked transcript, which often fails when processing niche media requests, regional dialects, or voice commands in noisy environments. The described framework preserves a complete set of alternative transcript hypotheses, packages them with their respective confidence metrics into a contextual container, and forwards them to a downstream semantic processing engine. By analyzing the phonetic relationships among these hypotheses alongside contextual signals …
Plain-Language Guide To The Systemic Progress Regeneration Protocol (Sprp), Volodymyr Kotegov
Plain-Language Guide To The Systemic Progress Regeneration Protocol (Sprp), Volodymyr Kotegov
Defensive Publications Series
This document serves as an operational commentary and plain-language implementation guide for the Systemic Progress Regeneration Protocol (SPRP). It translates the core theoretical constraints and validation criteria of the protocol into actionable workflows for independent developers. The guide focuses on the practical mechanics of maintaining tech lineage, executing isolation audits, and establishing onboarding steps within Phase 0 engineering domains.
In-Situ Eutectic Ultra-High-Temperature Ceramic Coatings With Dispersed Rhenium Intermetallics For Reusable Thermal Protection Systems, Volodymyr Kotegov
In-Situ Eutectic Ultra-High-Temperature Ceramic Coatings With Dispersed Rhenium Intermetallics For Reusable Thermal Protection Systems, Volodymyr Kotegov
Defensive Publications Series
Reusable launch vehicles and hypersonic re-entry vehicles experience surface temperatures that routinely exceed 2000 °C on leading edges and nose tips. Conventional ultra-high-temperature ceramic (UHTC) coatings based on hafnium or zirconium diboride offer high melting points but remain vulnerable to thermal-shock cracking and delamination caused by coefficient-of-thermal-expansion mismatch with the underlying composite substrate.
This paper describes a coating architecture that forms its final microstructure in situ during the first high-temperature exposure. A precursor layer of HfB₂ or ZrB₂, SiC and finely dispersed rhenium-based intermetallic particles is applied to a carbon-carbon or ceramic-matrix-composite substrate. When the surface temperature reaches approximately 1800–1950 …
Junction-Stabilized Graphene Aerogels For Cryogenic Insulation And Lightweight Radiation Shielding, Volodymyr Kotegov
Junction-Stabilized Graphene Aerogels For Cryogenic Insulation And Lightweight Radiation Shielding, Volodymyr Kotegov
Defensive Publications Series
Long-duration deep-space missions and reusable cryogenic stages require insulation that remains dimensionally stable at liquid-hydrogen temperatures, adds very little mass, and provides at least modest attenuation of ionizing radiation. Conventional polymer foams become brittle and crack after repeated cryogenic cycling in vacuum. Multi-layer insulation is thermally efficient but offers almost no radiation protection and loses performance when compressed.
This paper describes a graphene aerogel whose open-cell network is locked at the sheet junctions by in-situ formed metallic nano-clusters. Two practical variants are defined: a lower-metal thermal-primary grade optimised for minimum conductivity and maximum recovery, and a higher-metal radiation-enhanced grade that …
Alternative Api Manufacturing Routes To Alimatravir (Mk-8527) - Version 1.0, Ryan Littich, Douglas Klumpp, Titas Deb, Li-Mei Jin
Alternative Api Manufacturing Routes To Alimatravir (Mk-8527) - Version 1.0, Ryan Littich, Douglas Klumpp, Titas Deb, Li-Mei Jin
Defensive Publications Series
In this study, known chemical syntheses of MK-8527 (alimatravir) were examined and new synthetic routes proposed.
The baseline route to alimatravir was described in the 2015 Merck patent (WO2015148746A1). It involves a chemical synthesis of MK-8527 (no biocatalysis). Because of its similarities to islatravir (MK-8591), there has been a considerable amount of synthetic work related to this nucleoside structure. This synthetic chemistry is also briefly summarized.
Three synthetic routes are proposed with the aim of lowering the cost and improving the accessibility of MK-8527. In Proposed Route 1, the single enantiomer furanose intermediate (Cpd 31) is prepared from …
Multilingual Entity Mention Detection Using A Late-Fusion Transformer And Named-Entity-Recognition Architecture With Script-Aware Post-Filter Verification, Kaustav Saha, Shwetank Raghuvanshi, Batool Haider, Kliton Andrea, Chenhui Hu, Subramanian Srinivasan, Ashwin Kesireddy, Zscaler
Multilingual Entity Mention Detection Using A Late-Fusion Transformer And Named-Entity-Recognition Architecture With Script-Aware Post-Filter Verification, Kaustav Saha, Shwetank Raghuvanshi, Batool Haider, Kliton Andrea, Chenhui Hu, Subramanian Srinivasan, Ashwin Kesireddy, Zscaler
Defensive Publications Series
A system and method for detecting entity mentions in multilingual text are disclosed. A shared multilingual transformer encoder produces a pooled representation from a tokenized representation of an item of text. A named-entity-recognition (NER) feature extraction module produces an NER feature vector from the item of text and a configured entity list, the NER feature vector including exact-match, fuzzy-similarity, entity-overlap, organization-entity, position-score, and mention-frequency components. A late-fusion concatenation module concatenates the pooled representation with the NER feature vector after and external to encoder layers of the shared multilingual transformer encoder to form a joint representation. A classification head produces an …
Multi-Signal Fusion Architecture For Semantic Leak Detection In Large Language Model Inputs, Kaustav Saha Saha, Shwetank Raghuvanshi, Batool Haider, Kliton Andrea, Chenhui Hu, Subramanian Srinivasan, Ashwin Kesireddy, Zscaler, Inc.
Multi-Signal Fusion Architecture For Semantic Leak Detection In Large Language Model Inputs, Kaustav Saha Saha, Shwetank Raghuvanshi, Batool Haider, Kliton Andrea, Chenhui Hu, Subramanian Srinivasan, Ashwin Kesireddy, Zscaler, Inc.
Defensive Publications Series
A system detects semantic leakage of contextual information in a prompt to a large language model (LLM) by extracting, in parallel from a reference context and a user input, a cosine similarity signal from multilingual sentence embeddings, an entity overlap signal from extracted named entities, and a number match signal from extracted numerical patterns. Fusion weights are selected from a plurality of language-tier weight profiles based on a detected language of the user input, and a fused score is computed as a weighted combination of the signals. The reference context and the user input are routed onto a fast trigger …
Sensor Fusion Method For In-Cabin Zonal Solar Load Estimation And Hvac Mode Control, Anonymous
Sensor Fusion Method For In-Cabin Zonal Solar Load Estimation And Hvac Mode Control, Anonymous
Defensive Publications Series
Vehicle HVAC (Heating, Ventilation, and Air Conditioning) systems rely on solar load sensing to bias cabin cooling and maintain occupant thermal comfort. Conventional implementations use a single dash-mounted sunload sensor to estimate an aggregate solar heat load across the entire cabin, applying a uniform or, at best, a fixed left/right cooling bias. This approach does not account for the vehicle's actual heading relative to the sun, transient shading events, or differences in glass geometry and tint across occupant zones. This publication discloses a sensor fusion method that combines GPS-derived solar position geometry, vehicle heading, the existing single sunload sensor, and …
Jose Mejia-Henriquez V. Attorney General United States Of America
Jose Mejia-Henriquez V. Attorney General United States Of America
2026 Decisions
Agency
Bryan Shine V. County Of Montgomery
Bryan Shine V. County Of Montgomery
2026 Decisions
USDC for the Eastern District of Pennsylvania
Table Of Contents, The Editors
Resilience-Oriented Geological Safeguards For Damage Mitigation In Coal Resource Exploitation, Wang Shuangming, Sun Qiang, Yan Meixin, Miao Lintian, Liu Lang, Qiao Junwei, Niu Chao, Geng Jishi, Fang Chenxi, Zhang He, Xiao Lele, Li Shibo
Resilience-Oriented Geological Safeguards For Damage Mitigation In Coal Resource Exploitation, Wang Shuangming, Sun Qiang, Yan Meixin, Miao Lintian, Liu Lang, Qiao Junwei, Niu Chao, Geng Jishi, Fang Chenxi, Zhang He, Xiao Lele, Li Shibo
Coal Geology & Exploration
Background Coal remains a fundamental component of China’s energy security system. With the westward shift of coal development and continuous expansion into deeper strata, coal mining is confronted with increasingly complex geological conditions and growing ecological constraints. Geological damage induced by mining disturbance has evolved from isolated geological issues into a coupled Earth-system problem involving the lithosphere, hydrosphere, pedosphere, atmosphere, and biosphere, characterized by uncertainty, hysteresis, concealment, and cross-scale accumulation. Resilience-based damage mitigation emphasizes reducing the probability, intensity, and recovery costs of geological damage through proactive identification, dynamic regulation, damage suppression, and post-disturbance restoration under mining disturbance and external environmental …
Key Technologies And Their Application Of Vertical Large Models For Geological Guarantee In Coal Mining, Liu Zaibin, Fan Tao, Liu Borui, Chen Changyuan, Li Guihong, Li Wei, Jing Xiaotian, Li Xiping, Du Yiming
Key Technologies And Their Application Of Vertical Large Models For Geological Guarantee In Coal Mining, Liu Zaibin, Fan Tao, Liu Borui, Chen Changyuan, Li Guihong, Li Wei, Jing Xiaotian, Li Xiping, Du Yiming
Coal Geology & Exploration
Background General-purpose large language models (LLMs) have remarkable capabilities in natural language understanding and complex-task reasoning. However, when applied to geological guarantee in coal mining, these models still suffer from several inherent limitations, including insufficient professional geological knowledge, limited insights into industrial terminology, and inadequate integration of engineering logic and rules. Consequently, they face challenges in accurately capturing domain-specific knowledge and reasoning mechanisms required for geological interpretation, early warning of disasters, and decision-making for disaster prevention and control. These issues lead to limited applicability and reliability of general-purpose LLMs. On the other hand, geological guarantee in coal mining involves multi-source …
Mechanisms And Implications Of The Novel Cast Model Of Coal Graphitization, Wang Shaoqing, Zhang Jingzhe, Zhang Xiaomei, Wang Xiaoshuai, Chen Hao, Wang Xiaoling, Li Wu, Tang Yuegang
Mechanisms And Implications Of The Novel Cast Model Of Coal Graphitization, Wang Shaoqing, Zhang Jingzhe, Zhang Xiaomei, Wang Xiaoshuai, Chen Hao, Wang Xiaoling, Li Wu, Tang Yuegang
Coal Geology & Exploration
Objective and Methods Coal graphitization is a multi-stage process with abrupt changes rather than linear evolution. So far, its inherent driving mechanisms have not yet been fully elucidated. Notably, twisted graphene was observed in the process of coal graphitization in 2025, providing a new opportunity to reveal the essence of this structural transformation. Results and Conclusions By combining previous research results, this study proposes a novel coal graphitization model that consists of condensation, alignment, stacking, and twisting (CAST). The four parts of the CAST model are organically integrated, collectively forming a continuous and dynamic evolutionary process. Most especially, no absolute …
Microstructure Evolution Characteristics Of Coal Briquettes During Hot Pressing Carbonization And A Temperature Control Method, Gan Qingqing, Xu Jiang, Peng Shoujian, Cai Guoliang
Microstructure Evolution Characteristics Of Coal Briquettes During Hot Pressing Carbonization And A Temperature Control Method, Gan Qingqing, Xu Jiang, Peng Shoujian, Cai Guoliang
Coal Geology & Exploration
Objective Coal briquettes used for physical simulations of gas disasters in coal mines generally exhibit low strength and high permeability. To address this challenge, this study developed a new hot pressing process and a temperature control method to optimize the mechanical and seepage performance of coal briquettes. Methods First, an optimal mixing ratio scheme was determined based on the Horsfield close-packing theory, and coal briquettes were prepared at different temperatures using an independently developed hot pressing system. Subsequently, the microstructure evolution patterns of the hot-pressed coal briquettes were characterized using an X-ray diffractometer (XRD), an X-ray photoelectron spectrometer (XPS), a …
3d Geological Modeling And Its Application For Steeply Dipping Coal Seams In The Miquan Area, Xinjiang, Wu Luofei, Li Yong, Zhang Weiqi, Han Yiyang, Zhang Jie, Cao Mingliang, Li Qiang
3d Geological Modeling And Its Application For Steeply Dipping Coal Seams In The Miquan Area, Xinjiang, Wu Luofei, Li Yong, Zhang Weiqi, Han Yiyang, Zhang Jie, Cao Mingliang, Li Qiang
Coal Geology & Exploration
Background Influenced by multi-stage compression from the North Tianshan and Bogda mountains, the southern margin of the Junggar Basin in Xinjiang exhibits the widespread development of steeply dipping coal seams. The extreme stratigraphic occurrence, combined with complex structural superimposition styles, poses significant challenges to the fine-scale characterization of these coal seams. Correspondingly, the planar and regional distribution patterns of gas content in these coal seams remain poorly understood, rendering it difficult to effectively determine the sweet spots of coalbed methane (CBM). Methods Focusing on the Miquan area, Xinjiang, this study investigated the methodology for 3D geological modeling of representative steeply …
Evolutionary Characteristics And Fine-Scale Zoning Of Overburden Fractures For Pressure-Relief Mining Of Soft Coal Seams, Wang Long, Deng Zhiliang, Zhang Zongxiang, Guo Baohua, Tan Hongchen, Zhao Pengtao, Hu Longsheng
Evolutionary Characteristics And Fine-Scale Zoning Of Overburden Fractures For Pressure-Relief Mining Of Soft Coal Seams, Wang Long, Deng Zhiliang, Zhang Zongxiang, Guo Baohua, Tan Hongchen, Zhao Pengtao, Hu Longsheng
Coal Geology & Exploration
Objective During the mining of coal seam groups, substantial gas is prone to rush into the mining face from adjacent coal seams through interconnected mining-induced fractures. This poses a threat to safe coal mining. Under pressure-relief mining of soft coal seams, their low permeability and high stress sensitivity present challenges to the successive mining of protective and protected coal seams. Specifically, mechanisms behind the overburden fracture evolution remain poorly understood, and it is difficult to identify preferential pathways for gas migration accurately. Methods This study investigated coal seam groups in the Jiahe mining area of Hunan Province as the engineering …
Spatial Topological Configurations Of Cleats And Geometrical Quantitative Characterization Of Matrix Blocks In Deep Coal Seams, Shen Jian, Li Wei, Tian Yongjing, Ma Tianyu, Zhang Hewei, Dong Jiying, Zhu Peipei
Spatial Topological Configurations Of Cleats And Geometrical Quantitative Characterization Of Matrix Blocks In Deep Coal Seams, Shen Jian, Li Wei, Tian Yongjing, Ma Tianyu, Zhang Hewei, Dong Jiying, Zhu Peipei
Coal Geology & Exploration
Objective Cleats in deep coal seams are characterized by strong heterogeneity, and their topological configurations, as well as their topological relationships with matrix blocks, remain poorly understood. On the other hand, the assumptions regarding the size and geometry of matrix blocks adopted in representative reservoir structure models and numerical simulations do not fully reflect actual reservoir conditions. Methods Deep coal cores collected from the northeastern Ordos Basin were investigated in this study. Using CT scanning and topological theory, a multi-dimensional topological parameter system was established to characterize cleats in deep coal seams. Furthermore, four topological configurations of cleats in deep …
Stable Isotope-Based Origin Identification And Enrichment Zone Division Of Medium- To Low-Rank Coalbed Methane, Wang Qiong, Xu Fengyin, Ren Pengfei, Xu Hao, Lu Pengda, Hu Han, Zhou Siyuan
Stable Isotope-Based Origin Identification And Enrichment Zone Division Of Medium- To Low-Rank Coalbed Methane, Wang Qiong, Xu Fengyin, Ren Pengfei, Xu Hao, Lu Pengda, Hu Han, Zhou Siyuan
Coal Geology & Exploration
Objective Medium-to low-rank coalbed methane (CBM) exhibits complex origins with significant vertical differentiation, leading to unclear origin identification and enrichment patterns. This study aims to determine the genetic mechanisms, enrichment patterns, and efficient exploitation pathways of medium- to low-rank CBM. This will help improve the theoretical system for the exploration and exploitation of such CBM. Methods CBM data from 14 typical low- to medium-rank coalfields and coal-bearing basins across the world were comprehensively analyzed, including CBM compositions C1/(C2+C3), carbon and hydrogen isotopes of CH4 (δ13C-CH4 and δD-CH4 …
Dynamic-To-Static Elastic Parameter Conversion Models For Coals Under Temperature-Pressure Coupling: A Case Study Of The No. 8 Coal Seam In The Daning-Jixian Block, Zhang Wei, Wu Peng, Liu Conghui, Zhang Sidun, Sun Xuedong, Yang Haixing, Ma Zhuang, Shi Rui, Shen Jian
Dynamic-To-Static Elastic Parameter Conversion Models For Coals Under Temperature-Pressure Coupling: A Case Study Of The No. 8 Coal Seam In The Daning-Jixian Block, Zhang Wei, Wu Peng, Liu Conghui, Zhang Sidun, Sun Xuedong, Yang Haixing, Ma Zhuang, Shi Rui, Shen Jian
Coal Geology & Exploration
Objective Existing dynamic-to-static elastic parameter conversion models for coals fail to fully account for the actual in situ pressure and temperature conditions of deep reservoirs. This leads to significant deviations in directly evaluating the mechanical properties of reservoirs using log-derived dynamic parameters. To address this challenge, this study investigated dynamic-to-static elastic parameter conversion under the in situ stress and geotemperature conditions of strata. Accordingly, high-precision parameter conversion models were established. Methods This study examined coal samples from the No. 8 coal seam at a burial depth of approximately 1200 m in the Daning-Jixian block along the eastern margin of the …
A Geochemical Evaluation Method For Geological Sweet Spots Of Marine-Continental Transitional Shale Gas: A Case Study Of The Shan$^3_2 $ Sub-Member, Eastern Margin Of The Ordos Basin, Zhu Xingcheng, Li Yong, Lu Jungang, He Qingbo, Li Shuxin, Xiao Zhenglu, Li Xiang, Jiang Qijun
A Geochemical Evaluation Method For Geological Sweet Spots Of Marine-Continental Transitional Shale Gas: A Case Study Of The Shan$^3_2 $ Sub-Member, Eastern Margin Of The Ordos Basin, Zhu Xingcheng, Li Yong, Lu Jungang, He Qingbo, Li Shuxin, Xiao Zhenglu, Li Xiang, Jiang Qijun
Coal Geology & Exploration
Background China boasts abundant marine-continental transitional shale gas resources. However, marine-continental transitional shales in the country exhibit complex geological conditions characterized by rapid lateral facies transition, vertical superimposition of multiple lithologies, and small single-layer thickness. These characteristics pose a challenge to shale gas sweet spot prediction. Therefore, establishing a sweet spot grading and evaluation system tailored to these shales is of great significance for guiding decision-making in hydrocarbon exploration and supporting large-scale production. Methods Based on core observations, this study systematically evaluated the geochemical characteristics of marine-continental transitional shales in the 3rd submember of the 2nd member of the Permian …
Sources And Occurrence Patterns Of Hydrocarbons In The Surrounding Rocks Of Coal Seams: A Case Study Of The Jurassic Yan'an Formation In The Xinzhuang Mine Field, Longdong Area, Zhang Peng, Chen Dongdong, Zhao Junfeng, Zheng Kaige, Wang Chunxin, Zhou Xingtian
Sources And Occurrence Patterns Of Hydrocarbons In The Surrounding Rocks Of Coal Seams: A Case Study Of The Jurassic Yan'an Formation In The Xinzhuang Mine Field, Longdong Area, Zhang Peng, Chen Dongdong, Zhao Junfeng, Zheng Kaige, Wang Chunxin, Zhou Xingtian
Coal Geology & Exploration
Objective and Methods This study aims to ascertain abnormal hydrocarbon outflows from the surrounding rocks of coal seams in the Jurassic Yan'an Formation within the Xinzhuang mine field in the Longdong area, southwestern Ordos Basin. Based on the fundamental principles of petroleum geology, sedimentology, and coal geology, this study systematically analyzed the sources, occurrence patterns, and primary controlling factors of hydrocarbons in the surrounding rocks of coal seams using methods including core observation, sample analysis, and statistical mapping. Results and Conclusions In the Xinzhuang mine field, hydrocarbon outflows are primarily identified in the floor of the No. 8 coal seam …
Investigating Seepage In Rough Porous Media Fractures Using Fractional Brownian Motion Simulation, Liu Weitao, Kong Debin, Mao Qingfu, Zhao Jiyuan, Gu Yulong, Zhang Xiao
Investigating Seepage In Rough Porous Media Fractures Using Fractional Brownian Motion Simulation, Liu Weitao, Kong Debin, Mao Qingfu, Zhao Jiyuan, Gu Yulong, Zhang Xiao
Coal Geology & Exploration
Background Natural rock fractures are often partially filled with permeable materials such as silt and minerals under long-term geological and hydraulic actions, forming complex structures containing unfilled voids. The seepage characteristics of such fractures significantly influence petroleum extraction, mine water prevention, and the stability of underground engineering projects. Methods To reveal the underlying seepage mechanisms, this study generated rough profiles of unfilled voids with different fractal dimensions based on Fractional Brownian Motion. A theoretical expression for the overall permeability of partially filled fractures was derived, and a coupled free flow–porous medium flow numerical model was established. This framework was used …