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Increasing The Productive Potential Of Permanent Grasslands From The Forest Steppe Area Of Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache Mar 2023

Increasing The Productive Potential Of Permanent Grasslands From The Forest Steppe Area Of Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache

IGC Proceedings (1977-2023)

In Romania permanent grasslands represent 32 % of the total agricultural area, stretching over 4,872 million hectares, out of which 340,000 ha are located in the forest steppe area, on less productive soils, which explains their inadequate botanical composition and low quality and yields (Vintu, 2003). One of the main measures taken to increase the productivity of grasslands is through fertilisation (Birch, 1999). This paper presents the results obtained during 2000-2004 on the effect of organic fertiliser on degraded grasslands made up of Festuca valesiaca L.

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Diagnostic Gold Deportment Studies And Leaching Behaviour Of Small-Scale Gold Mining Tailings From Eastern Region, Ghana, Ishmael Quaicoe, Martin Beyuo, Solomon Quaicoe, Nikao A. Lasidzi Mar 2023

Diagnostic Gold Deportment Studies And Leaching Behaviour Of Small-Scale Gold Mining Tailings From Eastern Region, Ghana, Ishmael Quaicoe, Martin Beyuo, Solomon Quaicoe, Nikao A. Lasidzi

Journal of Sustainable Mining

Artisanal and small-scale gold mining (ASGM) sector employs about 80% of the mining workforce but only contributes about 20-30% of Ghana’s gold production. The low gold production is linked to low recoveries associated with the activities because ofinadequate understanding of the chemical, mineralogical and metallurgical characteristics of the ores. This study examined the metallurgical characteristics of typical small-scale gold mining tailings to understand their grinding characteristics, gold deportment and cyanidation behaviour. The gold deportment results showed that 96.1% of the gold in the samples is free milling (can be leached directly with cyanide and recovered through carbon adsorption), whilst the …

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Productivity Of Sahiwal And Friesian–Sahiwal Crossbreds In Marginal Grasslands Of Kenya, W. B. Muhuyi, F. B. Lukibisi, S. N. Ole Sinkeet Mar 2023

Productivity Of Sahiwal And Friesian–Sahiwal Crossbreds In Marginal Grasslands Of Kenya, W. B. Muhuyi, F. B. Lukibisi, S. N. Ole Sinkeet

IGC Proceedings (1977-2023)

Dual-purpose cattle can be used to exploit the production potential of semi-arid grasslands of Kenya for milk and meat production. Although the Sahiwal is adapted to these grasslands, its productivity is low. In order to increase milk and meat productivity, the Sahiwal has been crossed with the Friesian to produce Friesian-Sahiwal crossbreds (McDowell et al., 1996) adapted to the tropical environment. The objective of this study was to evaluate the productivity of Sahiwal and Friesian-Sahiwal crossbreds.

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The Influence Of Harvest Period And Fertilisation On The Yield Of Some Mixed Grass And Leguminous Species Under The Forest Steppe Conditions Of North-East Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache Mar 2023

The Influence Of Harvest Period And Fertilisation On The Yield Of Some Mixed Grass And Leguminous Species Under The Forest Steppe Conditions Of North-East Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache

IGC Proceedings (1977-2023)

In the forest steppe area of North-east Romania, temporary grasslands represent an important source of high quality fodder but they have a short period of exploitation, associated with some changes in the floristic composition (Vintu, 2003). Fertiliser application and harvest period have an important role in maintaining high productivity (Hopkins, 1991). The aim of this paper is to determine the influence of harvest period and fertilization on the yield of some grass and leguminous species in the forest steppe conditions of North-east Romania.

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Yield And Mineral Concentration Changes In Maize And Italian Ryegrass Cropping Systems, Sachiko Idota, Yasuyuki Ishii Mar 2023

Yield And Mineral Concentration Changes In Maize And Italian Ryegrass Cropping Systems, Sachiko Idota, Yasuyuki Ishii

IGC Proceedings (1977-2023)

Mineral balance between plants and soil to which fertilizer has been applied is important in sustainable agriculture. Cropping systems are chosen based on considerations of crop yield, soil physical and chemical properties and climatic conditions. Thus, the sustainability of a forage cropping system should only be assessed after continuous cultivation has been practiced for several years. Forage crop production is employed in the rice paddies of Japan during summer. Thus, the objective of this study was to evaluate the yield and mineral concentration of forage crops cultivated in hard-textured soils for 4 years.

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What Teacher Needs To Know About Stem-Nonfiction, Simranjeet Kaur Mar 2023

What Teacher Needs To Know About Stem-Nonfiction, Simranjeet Kaur

Andrews University Teaching and Learning Conference

What educators need to know about STEM nonfiction is covered in this presentation. Teaching subject like maths, science, technology, and engineering isn’t always mean going to lab or completing written worksheets. Different non-fiction book types are preferred by different children, and some students are better suited to specific subjects than others. Unlike traditional non-fiction, there isn't just one set of guidelines for selecting books for learners. Therefore, understanding the categories of STEM nonfiction can help educators with exploring science, technology, engineering, and maths.

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P.L.A.Y., Marco Vinicio Ruppel Mar 2023

P.L.A.Y., Marco Vinicio Ruppel

Andrews University Teaching and Learning Conference

When it comes to learning in a classroom, teachers always expect students to just sit and listen. However, there are ways to be able to teach students while being active through play and other activities. When you have little kids in your classroom, sure you want them to sit and learn, but there are times when you need to have them move around and play. That is because since they are so little, their attention span is not that long.

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The Importance Of Storytelling, Niang Lun-Ngai Hatlangh Mar 2023

The Importance Of Storytelling, Niang Lun-Ngai Hatlangh

Andrews University Teaching and Learning Conference

The Importance of Storytelling is the topic of my presentation. My presentation topics will be based on my research on the effects that storytelling has on various curricula (in schools), homes, and daily life. This implies that the presentation will go into detail on how storytelling affects reading and writing, how storytelling affects other subjects or how we may utilize storytelling in other subjects, how it affects our emotions, and how it affects the relationship between parents and children.

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Interdisciplinary Diffusion Lab, Sable Rosana Canales, Chloe Gaban Mar 2023

Interdisciplinary Diffusion Lab, Sable Rosana Canales, Chloe Gaban

Andrews University Teaching and Learning Conference

Diffusion is a principle in Physics, Chemistry, and Biology. Students can model the rate of diffusion based on particle size by contrasting blue and yellow dyes. Two petri dishes containing agar-agar receive a drop of dye at the center. The radius of expansion is recorded over time and variance increases linearly with time. Diffusion constants vary by particle size, allowing for a size ratio comparison between blue and yellow dyes. Relating the data to cells, students predict that smaller molecules diffuse into living cells, whereas larger molecules need some assistance from protein channels as in facilitated diffusion.

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How Metaverse Evolves The Architectural Design, Sheida Shakeri, Muhammed Ali Ornek Mar 2023

How Metaverse Evolves The Architectural Design, Sheida Shakeri, Muhammed Ali Ornek

Architecture and Planning Journal (APJ)

Architects have long relied on visualization tools to develop their concepts for specific design problems. From the early traditional drawings to the three-dimensional visualizations and virtual environments, all have enabled architects to demonstrate design outputs relatively early in the process. Real-world projects are similar to what architects imagined from the beginning. In other words, the design process has always started by creating the digital representation of a project and then attempting to replicate it in real life. Once the digital representation of design parts is complete, architects prepare their design for construction. However, the final visualization emerges from actual architectural …

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Beyond Flat Surfaces Parametric Derivations Of Historical Islamic Geometric Designs, Mostafa Alani, Sema Alaçam Mar 2023

Beyond Flat Surfaces Parametric Derivations Of Historical Islamic Geometric Designs, Mostafa Alani, Sema Alaçam

Architecture and Planning Journal (APJ)

This paper sets out to identify a guiding methodology and define algorithms to extend the existence of Islamic geometric designs beyond flat surfaces. The paper discusses two computational approaches to deriving various non-flat geometric compositions: Euclidean Point Extrusion and Curved Surface Fitting. The paper examines historical precedents, conducts an in-depth analysis of patterns employed to generate those elements, then establishes a computational process to explore the potential of translating 2D Islamic Geometric Designs into 3D non-flat surfaces.

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Adapting Digital Architecture Vocabulary To Reformulate Geometric Compositions Of Islamic Facades - Case Study: Proposed Model For Islamic Façade Through Digital Vocabulary, Sarah I. Hassan Mar 2023

Adapting Digital Architecture Vocabulary To Reformulate Geometric Compositions Of Islamic Facades - Case Study: Proposed Model For Islamic Façade Through Digital Vocabulary, Sarah I. Hassan

Architecture and Planning Journal (APJ)

Islamic architectural facades characterized by many distinguished vocabularies that formed its character; as arches, ornaments, al-Muqarnas and mashrabeya etc. However, during the modern era, the Islamic heritage regions faced many changes and transformations of its character, either by new buildings that were built according to modern or unplanned styles, or by random and unplanned developments. However, recently and with the beginning of the twenty first century and with the great breakthrough in the digital tools and techniques, it facilitates new horizons in the architectural form generation. Accordingly, the research focuses on how to investigate the positive impacts of digital technologies …

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Computational Design Approach For Applying Neuro-Architecture Principles In Healthcare Facilities, Ayman Assem, Merna Safwat Mar 2023

Computational Design Approach For Applying Neuro-Architecture Principles In Healthcare Facilities, Ayman Assem, Merna Safwat

Architecture and Planning Journal (APJ)

Neuroscience tools’ advancements have paved the way for neuroscience and architecture collaboration, spawning "Neuro-architecture." Neuro-architecture studies in various settings have been tentatively translated into design principles to improve the mood, perception, and satisfaction of healthcare facility users, as well as patient wellbeing and recovery rates. Integrating such principles into computational design methodologies should benefit users’ mental health and reduce the gap between computational design and human mental needs. The research was conducted in two phases: in the first phase, typologies used in evidence-based design research (EBD) were applied in order to determine neuro-architecture design principles for the interior environment of …

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A Framework For Creating A Hybrid Experience For Nft Artworks Through 3d Printing, Gozde Damla Turhan, Selen Cicek Mar 2023

A Framework For Creating A Hybrid Experience For Nft Artworks Through 3d Printing, Gozde Damla Turhan, Selen Cicek

Architecture and Planning Journal (APJ)

Technology has become a fundamental part of our environment, yet the borders between the physical and virtual realms become even more blurred. The introduction of the Metaverse is one of the most recent and notable innovations. It, just as any other technological advances, adapts to evolution in user needs serving as a link between the real and digital realms. While people can buy goods and services with a certain currency in the physical realm, cryptocurrencies and non-fungible tokens (NFTs) are used for transactions in the Metaverse. NFT provides customers a certificate of ownership, which means that their virtual commodities or …

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A Pixels-Based Design Approach For Parametric Thinking In Patterning Dynamic Façades, Zaki Mallasi Mar 2023

A Pixels-Based Design Approach For Parametric Thinking In Patterning Dynamic Façades, Zaki Mallasi

Architecture and Planning Journal (APJ)

In today’s Architectural design process, there has been considerable advancements in design computation tools that empowers designer to explore and configure the building façades schemes. However, one could formally argue that some processes are prescribed, lacks automation and are only for the purpose of visualizing the aesthetic design concepts. As a result, these design concept explorations are driven manually to exhibit variations between schemes. To overcome such limitations, the development presented here describes a proactive approach to incorporate parametric design thinking process and Building Information Modeling (BIM). This paper reports on an ongoing development in computational design and its potential …

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Exploring Virtual Reality As An Approach To Resurrect Destroyed Historical Buildings - An Approach To Revive The Destroyed “Egg Building” Through Vr, Aya Chehab, Bilal Nakhal Mar 2023

Exploring Virtual Reality As An Approach To Resurrect Destroyed Historical Buildings - An Approach To Revive The Destroyed “Egg Building” Through Vr, Aya Chehab, Bilal Nakhal

Architecture and Planning Journal (APJ)

An important part of a city, that gives it a sense of community and character, is its history. One way of acknowledging this heritage is by preserving historic building and structures. Old buildings are witnesses to the aesthetic and cultural history of a city, helping to give people a sense of place and connection to the past. Unfortunately, despite their importance within the city, historical buildings are most of the time subject to demolition and to be replaced- leaving behind stories told and untold of what use to be. The paper, therefore, aims to explore the capability of the metaverse, …

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Gamifying Origami - Rule-Based Improvisation For Design Exploration, Zeynep S. Bacinoğlu, Özlem Çavuş Mar 2023

Gamifying Origami - Rule-Based Improvisation For Design Exploration, Zeynep S. Bacinoğlu, Özlem Çavuş

Architecture and Planning Journal (APJ)

Origami, which originated as a folding paper game in Japan, has turned into a source of learning and inspiration for design and engineering studies. Complex two-dimensional patterns of origami sustain visual rules of space transformation. So, this paper proposes to gamify origami to get users more involved in the design space exploration process. For the gamification of origami, the study alters the origami patterns in a 3D modular composition with rules, scoring, and rounds in a design context. Gamifying origami becomes a tool for a learning experience for first-year architecture students in the early design phases. Accordingly, this paper presents …

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Digital Framework To Optimize Visual Comfort Using Kinetic Facades, Fatima Belok, Mostafa Khalifa, Ibtihal El-Bastawissi, Mohamad Hanafi Mar 2023

Digital Framework To Optimize Visual Comfort Using Kinetic Facades, Fatima Belok, Mostafa Khalifa, Ibtihal El-Bastawissi, Mohamad Hanafi

Architecture and Planning Journal (APJ)

Visual comfort is one of many aspects of human comfort that should be considered in architectural spaces. Visual comfort is an architectural necessity and could be achieved and optimized in spaces through controlling facades’ opening. This could be achieved by applying kinetic facades, which is one of the trends in the field of responsive architecture. However, the research’ s aim is optimizing visual comfort using kinetic facades in educational spaces. This optimization will improve the environmental quality of the educational space. In this research architects will achieve easily more effective kinetic facades to have better visual comfort by enhancing daylight …

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Progeny: A Grasshopper Plug-In That Augments Cellular Automata Algorithms For 3d Form Explorations, İnanç Şencan Mar 2023

Progeny: A Grasshopper Plug-In That Augments Cellular Automata Algorithms For 3d Form Explorations, İnanç Şencan

Architecture and Planning Journal (APJ)

Cellular automata (CA) is a well-known computation method introduced by John von Neumann and Stanislaw Ulam in the 1940s. Since then, it has been studied in various fields such as computer science, biology, physics, chemistry, and art. The Classic CA algorithm is a calculation of a grid of cells' binary states based on neighboring cells and a set of rules. With the variation of these parameters, the CA algorithm has evolved into alternative versions such as 3D CA, Multiple neighborhood CA, Multiple rules CA, and Stochastic CA (Url-1). As a rule-based generative algorithm, CA has been used as a bottom-up …

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Using Artificial Neural Networks And Space Syntax Techniques To Understand Mass Housing Design Parameters, Veli̇ Mustafa Yönder Mar 2023

Using Artificial Neural Networks And Space Syntax Techniques To Understand Mass Housing Design Parameters, Veli̇ Mustafa Yönder

Architecture and Planning Journal (APJ)

The design of mass housing is a complex process that involves the use of a large number of components and parameters. The field of design has unavoidably been changed by the impact of digitalization, which has resulted in the proliferation of computational design models, data structures, artificial intelligence, and an algorithmic way of thinking. Artificial neural networks, space syntax methodologies, predefined rules will help shape the steps of the schematic design process and establish certain limitations. Within the confines of this research, predefined guidelines were used to bring about geometric variances in the design of mass houses. Both traditional and …

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Computer Vision Aided Hotspot Creation In Virtual Environments, Lama A. Affara, Bilal E. Nakhal Mar 2023

Computer Vision Aided Hotspot Creation In Virtual Environments, Lama A. Affara, Bilal E. Nakhal

Architecture and Planning Journal (APJ)

Hotspot creation is one of the most important modules within virtual environments which helps show the navigators of these environments some information about semantic elements within it and facilitate the navigation between the virtual spaces. In this paper, a system for automatic hotspot proposals and creation in virtual environments is proposed. The system uses computer vision modules to automatically propose hotspot locations in addition to identifying and creating these hotspots with candidate labels. Two main modules used in the system are object detection and scene segmentation. The scene segmentation helps give candidate hotspot areas and provides an overall understanding of …

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Generating Mass Housing Plans Through Gans - A Case In Toki, Turkey, Gi̇zem Özerol Özman, Semra Arslan Selçuk Mar 2023

Generating Mass Housing Plans Through Gans - A Case In Toki, Turkey, Gi̇zem Özerol Özman, Semra Arslan Selçuk

Architecture and Planning Journal (APJ)

Nowadays, Machine Learning (ML) is frequently used in almost all disciplines having an intersection with technology. Recently, architects are using existing plan data sets in architecture through Deep Learning (DL) algorithms of big data to achieve generative and non-existent plan models by using ML. Especially, Generative Adversarial Neural Networks (GANs), one of the deep learning algorithms, have been in use in the creation of generative models for architectural studies. Within the scope of this paper, architectural drawings were generated by using GANs. This generation method allows for the training of spatial layout planning to networks and for the generation of …

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Research On Aquifer Water Abundance Evaluation By Borehole Transient Electromagnetic Method Based On Fcnn, Cheng Jiulong, Wang Huijie, Xu Zhongzhong, Huang Qisong, Jiang Guoqing Mar 2023

Research On Aquifer Water Abundance Evaluation By Borehole Transient Electromagnetic Method Based On Fcnn, Cheng Jiulong, Wang Huijie, Xu Zhongzhong, Huang Qisong, Jiang Guoqing

Coal Geology & Exploration

Predicting the location and water abundance of aquifers by drilling or geophysical methods before tunneling is very important to prevent water disasters in advance for the safety of coal mine production. The use of borehole transient electromagnetic method (BTEM) for advanced detection has obvious advantages. At present, the interpretation method is based on the calculated resistivity to qualitatively analyze rock water abundance, and it is impossible to predict the aquifer water abundance grade. So, the fully convolutional neural network (FCNN) method is proposed to predict the aquifer water abundance grade for BTEM. Firstly, according to the Archie formula, Kozeny-Carman formula, …

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Challenges And Solutions To High-Resolution Data Processing For Seismic Exploration, Cao Siyuan, Sun Yaoguang, Chen Siyuan Mar 2023

Challenges And Solutions To High-Resolution Data Processing For Seismic Exploration, Cao Siyuan, Sun Yaoguang, Chen Siyuan

Coal Geology & Exploration

The seismic resolution has long been limited to the quarter wavelength. To compress the seismic wavelet, the key problems are signal-to-noise ratio (SNR) and resolution in early stages, and high resolution and high fidelity in late stages. Meanwhile, by using well data, many inversion methods of spanning quarter wavelength have been developed. The success of these methods depends on the preservation of seismic wave amplitude, the accuracy of seismic interpretation, and the compatibility between well data and seismic data. Afterward, researchers achieved seismic inversion without well data constraint, and the corresponding resolution reached the level of reflectivity. Meanwhile, the key …

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Research Status And Development Trend Of Mine Electrical Prospecting, Yue Jianhua, Yang Haiyan, Ran Huageng Mar 2023

Research Status And Development Trend Of Mine Electrical Prospecting, Yue Jianhua, Yang Haiyan, Ran Huageng

Coal Geology & Exploration

Transparency of hidden geological factors is critical to intelligent and precise coal mining and therefore the prevention and control of major accidents in coal mine. The significant electrical property change can be resulted from several factors, such as the structure of coal and rock mass, the fluid occurrence, etc., providing a basis of physical property for mine electrical prospecting. For more than 30 years, mine electrical prospecting has played a key role to water prevention and control of coal mine in China. Definitely, many symbolized results on theory, technique and application of mine electrical prospecting have been produced through several …

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From 1d To 4d: Advances And Thoughts On Coal Seismic Technology, Cheng Jianyuan, Zhang Xianxu, Jiang Bici, Wang Pan, Shan Rui Mar 2023

From 1d To 4d: Advances And Thoughts On Coal Seismic Technology, Cheng Jianyuan, Zhang Xianxu, Jiang Bici, Wang Pan, Shan Rui

Coal Geology & Exploration

As one of the key technologies for safe and efficient support of coalmine geology, the seismic technology, has gone through one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D), and progressed from resource exploration to mining area exploration, and from structural exploration to lithological exploration. The latest 4D seismic will further leapfrog from static detection to dynamic detection. Based on the concepts of time-space dimensions and the four seismic development stages, we propose three transitional stages from 1.5D (e.g., non-zero offset VSP), 2.5D (e.g., wide line 2D seismic exploration) to 3.5D (e.g., 3D seismic dynamic interpretation), and also present the time-space characteristics …

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Simulation Test On Water-Rock Interaction In Coal Mine Goaf, Sun Yajun, Zhao Xianming, Xu Zhimin, Guo Juan, Zhang Li, Chen Ge, Chen Tianci, Zhu Lulu, Gao Yating, Chen Weiyang Mar 2023

Simulation Test On Water-Rock Interaction In Coal Mine Goaf, Sun Yajun, Zhao Xianming, Xu Zhimin, Guo Juan, Zhang Li, Chen Ge, Chen Tianci, Zhu Lulu, Gao Yating, Chen Weiyang

Coal Geology & Exploration

Water accumulation is widely present in the goaf of coal mine in China. It is of great significance to clarify the water-rock interaction mechanism in the closed and semi-closed goaf environment for water pollution reduction and groundwater resource protection in coal mine area. Taking the water accumulation in the goaf of a coal mine in Inner Mongolia as the research object, we designed a box simulation test to highly restore the goaf environment. X-ray diffractometer (XRD) and X-ray fluorescence spectrometer (XRF) were used to analyze the mineral composition and element composition of the simulated filler of goaf (coal and caving …

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Domestic And Foreign Progress Of Mine Water Treatment And Resource Utilization, Wang Hao, Dong Shuning, Shang Hongbo, Wang Tiantian, Yang Jian, Zhao Chunhu, Zhang Quan, Zhou Zhenfang, Liu Ji, Hou Yue Mar 2023

Domestic And Foreign Progress Of Mine Water Treatment And Resource Utilization, Wang Hao, Dong Shuning, Shang Hongbo, Wang Tiantian, Yang Jian, Zhao Chunhu, Zhang Quan, Zhou Zhenfang, Liu Ji, Hou Yue

Coal Geology & Exploration

The treatment and resourceful utilization of mine water is an important thrust to achieve the dual goals of high-quality development of coal industry and ecological civilization construction in mining area. The decision to effectively treat and use mine water as an unconventional water resource will inevitably be made in the future due to the restrictions of a global water resource deficit and ecological environment protection. From the standpoint of the quality features of mine water in various mining sites, the formation mechanism and evaluation techniques of mine water quality were completely detailed here. Meanwhile, there were two stages in the …

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Cause, Countermeasures And Solutions Of Water Hazards In Coal Mines In China, Yin Shangxian, Wang Yuguo, Li Wensheng Mar 2023

Cause, Countermeasures And Solutions Of Water Hazards In Coal Mines In China, Yin Shangxian, Wang Yuguo, Li Wensheng

Coal Geology & Exploration

In the new century, the coal industry has experienced a decade of rapid development, and the coal output has been stabilized at about 4.5 billion tons. The coal mine safety situation is generally good, with the multiple, frequent and even catastrophic accidents reduced, the major accidents at sometimes developed to be single and occasional, and the extraordinarily serious accidents were controlled effectively. Water hazard of mine is still the main type of coal mine hazards in China, and it is the second largest lethal reason after gas hazard. The analysis shows that the complex mining environment and the insufficient attention …

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Characteristics Of Roof Water Hazard Of Coal Seam In Huanglong Coalfield And Key Technologies For Prevention And Control, Jin Dewu, Li Chaofeng, Liu Yingfeng, Cao Haitao, Ren Dengjun, Wang Hongliang,, Zhang Jinkui, Huang Yang, Yang Guodong, Guo Kang, Fan Min, Liu Chenkai Mar 2023

Characteristics Of Roof Water Hazard Of Coal Seam In Huanglong Coalfield And Key Technologies For Prevention And Control, Jin Dewu, Li Chaofeng, Liu Yingfeng, Cao Haitao, Ren Dengjun, Wang Hongliang,, Zhang Jinkui, Huang Yang, Yang Guodong, Guo Kang, Fan Min, Liu Chenkai

Coal Geology & Exploration

Huanglong Coalfield in Shaanxi is one of the main coal production bases in China. Coal mining is usually affected by the sandstone water of the thick Luohe Formation on the roof, resulting a significant difficulty in the prevention and control of water hazards. It is therefore of great importance to correctly analyze the characteristics of water inflow from the roof and successfully develop the key technologies for water hazard prevention and control, ensuring the safe production of coal mines. The types of roof water hazard and its main controlling factors were appropriately analyzed by collecting the information on water inflow …

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