Sustainability Commons^™

Model-Driven Energy Attenuation Method For Coal Seam Strong Reflection, Zhang Xianxu

Coal Geology & Exploration

The reflection of coal seam in seismic data has the characteristics of strong energy, which makes the reflection of adjacent strata often concealed by the reflection of coal seam. This makes it difficult to image the adjacent weak layer and lithological interpretation difficult. Aiming at this problem, a model-driven energy attenuation method for coal seam strong reflection was proposed. This method uses the coal thickness calculated by logging and measured by borehole in underground coal mine to construct cross plot with reflection amplitude of coal seam, and fit the relationship formula between amplitude and thickness. The digital model was constructed …

Influence Of Water Injection In Burst-Prone Coal Seam On Suction And Sticking During Drilling, Hao Zhiyong, Li Zhiwei, Pan Yishan

Coal Geology & Exploration

When the spiral drill pipe is used to predict and evaluate the dynamic disasters such as rock burst, the drilling dynamic phenomena such as suction and sticking are easy to occur. In order to study the influence of water injection in burst-prone coal seam on suction and sticking, the mechanism of dynamic phenomenon of suction and sticking was analyzed by establishing the mechanical model of drill pipe, pointing out that the stress of coal body and the amount of drilling cuttings are the important factors that affect the occurrence of suction and sticking, deriving the calculation formula of drilling mechanical …

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

The Structural Characteristics And Their Influence On Production Of Buliangou Coal Mine, Ma Liang, Guo Rui

Coal Geology & Exploration

Jungar coalfield is located at the turning point of Yimeng uplift and Jinxi flexure belt in Ordos basin. There are many kinds of mine structures in the coalfield, and the structural complexity has changed greatly before and after the exposure by mine production. Taking the fold, fault, karst collapse column, igneous rock intrusion and other geological structures exposed by geological exploration and mining as the research object, quantitative or semi-quantitative evaluation of structural development characteristics in the mine was carried out by means of mathematical statistics, and the formation mechanism, evolution background of different geological structures were analyzed. The main …

Experiment Of Mesostructure And Hydrologic Characteristics Of Weakly Cemented Soft Rocks In Western China, Zhang Jiafan, Cheng Shufan, Wang Huan, Gao Zhuang, Zhou Feiwen, Zhou Hongwen

Coal Geology & Exploration

In order to accurately grasp the hydrologic characteristics of weakly cemented soft rocks in western China, the hydraulic and mechanical properties of red sandstone collected from northern Shaanxi mining area were tested. Based on the scanning image of scanning electron microscope(SEM), the mesostructural characteristics of the rocks were analyzed, and the relationship between the mesostructure of rocks and its macroscopic hydrologic characteristics was established. The results show that red sandstone has obvious characteristics of water saturation and water absorption and expansion, and its softening coefficient is 0.64. Under the action of pressure water erosion and dry and wet cycle, the …

Exploration And Quantitative Evaluation Of Overburden Strata “Three Zones” In Deep Strip Mining, Liu Zhen, Wang Yutao, Liu Xiaoping, Wang Xiaodong

Coal Geology & Exploration

In order to study the height of overburden fractures in deep strip mining, engineering geological drilling, borehole television and coalfield well logging have been applied to detect and analyze the overburden fractures in a coal mine in Jining coalfield. The results indicate that, under the strip mining with gentle dip(6°), deep depth(538 m) and 1:2 mining-retention ratio(mining -50 m and remaining -100 m), the “three zones” develop prominently, presenting “wavy” destruction in space, and the goaf has no obvious cavity. The height of caving zone is 8.45 m which is 3.0 times of the mining height, and the fault zone …

Production Decline Law And Influencing Factors Of High-Rank Coal Cbm Wells, Jia Huimin, Hu Qiujia, Mao Jianwei,, Mao Chonghao, Liu Chunchun, Zhang Qing, Liu Changping

Coal Geology & Exploration

In order to reveal the production decline law of high-rank coal CBM wells, based on the development data of Fanzhuang block in southern Qinshui basin for more than 10 years, this paper studies the decline point, decline type and influencing factors of high-rank coal CBM wells by means of numerical simulation and statistical analysis. The results show that the decline point of the Fanzhuang block is 25% and the average decline point of the single well is 21%. Most wells begin to decline after drainage of 4 years. The decline point of CBM well is determined by matrix permeability and …

Fracturing Parameters Analysis And Productivity Evaluation Of Vertical Coalbed Methane Wells With Nitrogen Foam, Li Hengle, Cao Yunxing, Zhou Dan, Chai Xuezhou, Liu Tongji, Feng Peiwen, Shi Bin, Tian Lin

Coal Geology & Exploration

Fracturing parameters are important parameters that affect the fracturing effect, fracture characteristics and CBM productivity. Through an in-depth understanding of the influence of fracturing parameters on productivity, it is essential to optimize the fracturing process and increase the productivity of CBM wells. Taking 45 nitrogen foam fracturing wells in Lu’an mining area as the research object, the types of fracturing operation curves and their effects on productivity were studied. The relationship between fracturing fluid dosage and productivity was discussed. The differences in productivity of nitrogen foam wells and hydraulic fracturing wells was compared and analyzed. The results show that: Nitrogen …

Hydrogeochemical Evolution Of No.15 Coal Seam And Limestone K2 In Southern Qinshui Basin, Li Zhongcheng, Wu Jianguang, Wang Jianzhong, Wu Xiang, Lu Guojun

Coal Geology & Exploration

Based on the water test data of No.15 coal roof K₂ limestone and No.15 coalbed methane well in the southern Qinshui basin, the characteristics, types and the genetic mechanism of water chemical composition were systematically studied by statistical and comparative methods. The evolution model was built to systematically describe the various reactions and effects of limestone and coalbed water in the recharge zone, runoff zone and detention zone. The results show that the K₂ limestone water and the No.15 coal seam water will undergo ion exchange, mixing and CO₂ action. The K₂ limestone water is mainly …

Effect Of Acidification On The Microstructure And Physical Properties Of Shale, Chen Liuyu, Li Xijian, Shen Zhonghui, Xu Shiqing, Ma Shengxiang, Yin Xin

Coal Geology & Exploration

As the main shale gas reservoir in Guizhou, it is proved that Longmaxi Formation has good shale gas accumulation conditions and resource development potential. In order to reveal the response law of acidification on the micropore structure and physical properties of Longmaxi Formation shale in Guizhou, the difference in physical properties of shale microstructures before and after acidification, such as pore volume, porosity, specific surface area and pore size distribution was quantitatively characterized by X-ray diffraction(XRD) analysis, mercury intrusion measurement, low-temperature nitrogen adsorption and nuclear magnetic resonance(NMR) experiment. The structural characteristics of the shale pores before and after acidification were …

Common Midpoint Gather Constraint-Based Impedance Inversion Of Ground Penetrating Radar, Dai Qianwei, Ning Xiaobin, Zhang Bin

Coal Geology & Exploration

GPR impedance inversion is an effective method to obtain accurately the intrinsic parameters of the subsurface medium. This method relies on low frequency information provided by logging data, but it is rarely accompanied by drilling in practical applications. To solve the problem, the common midpoint velocity analysis is employed to provide more low frequency component information for impedance inversion of GPR to finely reconstruct the dielectric parameter of subsurface in the framework of velocity-constrained inversion technique. Firstly, a layer model is specifically set up as an example to verify the feasibility of the developed velocity- constrained inversion to regulate the …

Gather, Educate, Prepare: Libraries As Champions To Build Informed And Climate-Resilient Communities, Adrian K. Ho, René Tanner, Monika Antonelli

Library Presentations

The past few years have witnessed increasing numbers of discussions and programs about the impacts of climate change, addressing topics from the devastating wildfires in California, relentless heat waves in Europe, to the accelerating thaw of the ice sheet in Greenland. The media has described the social atmosphere using such terms as climate angst, ecological grief, and existential crisis. Weighed down by a steady stream of climate news, some people have sought professional help for guidance on tackling emotional responses to natural disasters and climate trauma. Meanwhile, many of us are wondering what can be done. As a central player …

Quantifying The Environmental Impacts Of Cookstove Transitions A Societal Exergy Analysis Based Model Of Energy Consumption And Forest Stocks In Honduras, Noah Ver Beek, Elvin Vindel, Matthew K. Heun, Paul E. Brockway

University Faculty Publications and Creative Works

Unsustainable consumption of biofuels contributes to deforestation and climate change, while household air pollution from burning solid biofuels in homes results in millions of premature deaths globally every year. Honduras, like many low and medium Human Development Index countries, depends on primary solid biofuels for more than 30% of its primary energy supply (as of 2013). We conducted a societal exergy analysis and developed a forest stock model for Honduras for 1971–2013 and used the results to model an energy transition from traditional wood stoves to either improved efficiency wood cookstoves or modern fuel cookstoves (using Electricity or Liquefied petroleum …

Climate Change Impacts The Subsurface Transport Of Atrazine And Estrone Originating From Agricultural Production Activities, Renys Enrique Barrios, Simin Akbariyeh, Chuyang Liu, Khalid Muzamil Gani, Margarita T. Kovalchuk, Xu Li, Yusong Li, Daniel D. Snow, Zhenghong Tang, John Gates, Shannon L. Bartelt-Hunt

Nebraska Water Center: Faculty Publications

Climate change will impact soil properties such as soil moisture, organic carbon and temperature and changes in these properties will influence the sorption, biodegradation and leaching of trace organic contaminants to groundwater. In this study, we conducted a modeling case study to evaluate atrazine and estrone transport in the subsurface under current and future climate conditions at a field site in central Nebraska. According to the modeling results, in the future, enhanced evapotranspiration and increased average air temperature may cause drier soil conditions, which consequently reduces the biodegradation of atrazine and estrone in the water phase. On the other hand, …

Data From: Forest Density Intensifies The Importance Of Snowpack To Growth In Water-Limited Pine Forests, Kelly E. Gleason, John B. Bradford, Anthony W. D’Amato, Shawn Fraver, Brian J. Palik, Michael A. Battaglia

Environmental Science and Management Datasets

Research Study
Warming climate and resulting declines in seasonal snowpack have been associated with drought stress and tree mortality in seasonally snow-covered watersheds worldwide. Meanwhile, increasing forest density has further exacerbated drought stress due to intensified tree-tree competition. Using a uniquely detailed dataset of population-level forest growth (n=2495 sampled trees), we examined how inter-annual variability in growth relates to snow volume across a range of forest densities (e.g., competitive environments) in sites spanning a broad aridity gradient across the United States. Forest growth was positively related to snowpack in water-limited forests located at low latitude, and this relationship was intensified …

Session 6: Innovating The Built Environment Post-Covid-19, Marc Palatucci, Richard Lyall, Timothy Harris, Steven Bender, Peter Smirniotopoulos, Ryan Mathesin

SITIE Symposiums

ABSTRACT: Innovating the Built Environment for a Post-COVID-19 World

It would seem an act of academic malpractice to teach a course titled Innovating the Built Environment: How the Law Responds to Disruptive Change, and host an all-day symposium as an integral part of that course, and not endeavor to address the most-disruptive thing to happen to the built environment in more than 100 years: The coronavirus pandemic. This "disruption" to real estate is the proverbial elephant in the room. Hopefully, it will maintain a minimum six-foot distance from others as we address how it impacts the four Special Topics …

Session 5: Real Estate Tokenization, Joseph Vincent, Steven Bender, Peter Smirniotopoulos

SITIE Symposiums

ABSTRACT: Is “tokenization” the next great leap forward needed to make homeownership more appealing to Millennials and Gen Z’s?

If single-family homeownership and time-sharing had a love child, what would it look like? Is it possible to adapt successful models for office sharing to homeownership so renters who lament not owning an appreciating asset could have a stake in “something” while not being tied down to one specific residential structure or a single geographic location, to make homeownership more attractive to younger generations? And, if so, does blockchain technology hold the key (pun intended) to fractional ownerships in real …

Session 4: Atlanta Beltline, Art Lansing, Rob Turner, Jim Langford, Kristen Lohse, Claire Martini

SITIE Symposiums

ABSTRACT: What Would it Take to Connect All of Greater Seattle’s Neighborhoods with Walking and Biking Trails?

Major U.S. cities have endeavored, independently of each other, over the past several decades to create greenway systems connecting residents and visitors with neighborhoods and attractions, increasing opportunities for walking and biking and reducing their reliance on vehicular traffic. Atlanta’s BeltLine--a twenty-two-mile loop of historic railroad right-of-ways encircling the city’s downtown and midtown areas, seeks to reinvent the city if transformed into a green corridor—is perhaps one of the best examples of how a Seattle Greenway might be accomplished (although Atlanta’s concerted …

Session 3: Virtual Luncheon Session, Student Submissions

SITIE Symposiums

A Working Lunch brainstorming discussion, moderated by Professor Smirniotopoulos, to discuss “What Comes Next?” in the context of Innovating the Built Environment: How the Law Responds to Disruptive Change.

Registered students in Prof. Smirniotopoulos’s Innovating the Built Environment course will take one-to-two minutes each to present their initial project ideas for their Final Projects in the course, as well as outlining and moderating a discussion of the Challenges and Opportunities presented by their ideas. Symposium participants are encouraged to set up lunch in front of their computers and participate actively in discussing each student’s project idea, providing relevant …

Session 2: Wework, Ryan Mathisen, Peter Smirniotopoulos, Paul Swegle

SITIE Symposiums

ABSTRACT: When Worlds Collide: How an 86-Year Old Federal Law (The Securities Act of 1933) Exposed the Flaws in WeWork’s “Innovative Business Model.”

Co-working pioneer WeWork, a wholly owned subsidiary of The We Company, grew meteorically through an extremely aggressive building and master-lease acquisition strategy over the past several years. Substantial, early stage funding from SoftBank, a Japan-based high-tech venture capital investment bank, reinforced WeWork’s unicorn status. But was WeWork’s business model truly unique, bringing with it the promise of a very profitable real estate operating company in the future? Or was it the company’s early stage, venture …

Session 1: Crew Seattle Presentation, Emily Alvarado, Jeanne Marie Coronado, Tory Laughlin Taylor, Colin Morgan-Cross

SITIE Symposiums

ABSTRACT: Is there Still a Place in Seattle for the Single-Family Detached Housing Typology, Given the Acute Need for Affordable Housing?

This expert panel will explore the intersection between existing zoning laws and well-established neighborhood patterns of development, on the one hand, and the acute need for the increased production and availability of affordable housing, in the greater Seattle area, including in and near the City of Seattle’s Central Business District, as well as other close-in employment centers, on the other hand. The genesis of this Special Topic in the Innovating the Built Environment SITIE2020 course came out of …

Opening Session, Annette Clark, Steven Bender, Peter Smirniotopoulos

SITIE Symposiums

The SITIE2020 Symposium: Innovating the Built Environment was offered entirely online, through the Zoom platform. Each of six (6) symposium sessions, outlined below, were offered in a continuous Zoom session with breaks throughout the day, allowing our audience to select those sessions of greatest interest to them. Students enrolled in Professor Smirniotopoulos’s Summer Institute course—Innovating the Built Environment: How the Law Responds to Disruptive Change—participated all day.

Proceedings Of The Sitie2020 Symposium, Seattle Journal Of Technology, Environmental, And Innovation Law

SITIE Symposiums

Complete Summary of Proceedings.

A Hydrometeorological Assessment Of The Historic 2019 Flood Of Nebraska, Iowa, And South Dakota, Paul Xavier Flanagan, Rezaul Mahmood, Natalie Umphlett, Erin M.K. Haacker, Chittaranjan Ray, Bill Sorensen, Martha Shulski, Crystal J. Stiles, David Pearson, Paul Fajman

High Plains Regional Climate Center: Staff Publications

During early 2019, a series of events set the stage for devastating floods in eastern Nebraska, western Iowa, and southeastern South Dakota. When the floodwaters hit, dams and levees failed, cutting off towns, while destroying roads, bridges, and rail lines, further exacerbating the crisis. Lives were lost and thousands of cattle were stranded. Estimates indicate that the cost of the flooding has topped $3 billion as of August 2019, with this number expected to rise.

After a warm and wet start to winter, eastern Nebraska, western Iowa, and southeastern South Dakota endured anomalously low temperatures and record-breaking snowfall. By March …

Numerical And Analytical Methods To Predict Behavior Of Reinforced Ductile Concrete Composites, Mandeep Pokhrel

Dissertations

Structural components constructed with ductile concrete composites, such as high-performance fiber-reinforced cementitious composites (HPFRCC), are known to perform exceptionally well under extreme mechanical and environmental loading conditions compared to traditional concrete. HPFRCC flexural components exhibit enhanced performance in terms of displacement ductility, energy dissipation capacity, and damage tolerance capacity. However, recent research suggests that the flexural behavior of reinforced HPFRCCs in terms of crack progression, reinforcement plasticity, and failure mechanism is significantly different than conventional reinforced concrete. Specifically, the failure mode of flexural members is found to be predominantly through the fracture of longitudinal reinforcement rather than compression crushing of …

Collaboration And Evaluation In Urban Sustainability And Resilience Transformations: The Keys To A Just Transition?, Liliana Elizabeth Caughman

Dissertations and Theses

Climate has changed and will continue changing; city populations are swelling as urbanization continues to accelerate; extreme environmental events like heat waves and floods are becoming more severe and more common; and the climate justice movement is rapidly gaining momentum. It in this context that municipal governments find themselves urgently seeking solutions to transition cities from extractive, vulnerable, and unjust to sustainable, resilient, and equitable. The task is complex and will require systemic transformations across interconnected social, environmental, and economic infrastructures. Emerging theories regarding how to govern such massive changes suggest Transition Management strategies and the values of a just …

Storm Surges In The Bohai Sea: The Role Of Waves And Tides, Yuanyi Li, Huan Feng, Guillaume Vigouroux, Dekui Yuan, Guangyu Zhang, Xiaodi Ma, Kun Lei

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

A storm surge is a complex phenomenon in which waves, tide and current interact. Even though wind is the predominant force driving the surge, waves and tidal phase are also important factors that influence the mass and momentum transport during the surge. Devastating storm surges often occur in the Bohai Sea, a semi-enclosed shallow sea in North China, due to extreme storms. However, the effects of waves on storm surges in the Bohai Sea have not been quantified and the mechanisms responsible for the higher surges that affect part of the Bohai Sea have not been thoroughly studied. In this …

From Environmental Activism To Environmental Education A Historical Overview, Evaluations And A Suggestion For A Path Forward For The Religious Institutions As Partners For A Global Green Shift, Tom Sverre Tomren

Consensus

In this article, the author shows how all the major world religions have engaged in climate and environmental activism by developing theology and practical projects for more than fifty years. Using metadata from the European Social Survey, he shows that members of all religious traditions in Europe have become increasingly positive to the environment and nature. Especially noticeable is the increased engagement of Protestant Christians. Tomren uses a case study from the Lutheran Church in Norway to show how religious actors have a great influence on their own members. Against this background, the author argues that religious institutions should see …

Adam, Dust Of The Earth: A Paradise Received And Incomplete In The Biblical Accounts Of Creation. Some Philological Observations On The Creation Accounts, Jean Koulagna

Consensus

In Christian thinking about climate and environment issues, Dogmatic theology has often seemed to precede the exegesis of biblical texts. And when it is suggested, this exegesis is usually based on previously formulated theological conclusions. In other words, exegesis is there to support ethical stands that are no doubt laudable, but have been already established. Under these conditions, it becomes difficult to analyze those texts as they are and to understand them within the historical and anthropological contexts in which they were produced. This article attempts to break this trend by suggesting philological observations concerning the creation accounts in Genesis. …

Fetishized Nature Or Life-Giving Breath? Religion As Skill In Climate Change, Sigurd Bergmann

Consensus

Anthropogenic climate change and unsustainable modes of production, consumption and lifestyles represent one of the most demanding challenges facing Earth, our home and humanity. Therefore religious belief, faith communities and spiritual commitment are highly needed to prepare the ground for what has been described as the necessary “great transformation”. To achieve this transformation, we need a new climate narrative and iconography, supported by a broad alliance of local and trans-local social forces. Religion has a significant role to play in this mobilization. This article begins by depicting several reasons that religion is a crucial driving force in the needed great …