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Articles 781 - 810 of 913
Full-Text Articles in Sustainability
Table Of Contents, The Editors
Geochemical Characteristics And Significance Of Water Produced By Coalbed Methane Wells In Lu’An Mining Area, Hua Mingguo, Tian Lin, Zhang Yan, Li Jia, Cao Yongheng
Geochemical Characteristics And Significance Of Water Produced By Coalbed Methane Wells In Lu’An Mining Area, Hua Mingguo, Tian Lin, Zhang Yan, Li Jia, Cao Yongheng
Coal Geology & Exploration
Hydro-geochemistry analysis is an important method for CBM exploration and development research. In this paper, the distribution characteristics of salinity, H/O stable isotope and ion concentration in sample water was investigated, and the optimal CBM development area was analyzed by the characteristics of regional structural distribution and the CBM development history. The testing water was from the No.3 CBM well of the Shanxi Formation Permian system in the Lu’an Mining area in the south-central part of Qinshui Basin. The results show that there are three high salinity areas in the mining area, with an average groundwater salinity of 2 000-3200 …
Mechanical Properties And Acoustic Emission Characteristics Of Sandstone Under Natural And Saturated Conditions, Zhang Yin, Li Zhe, Song Shikang, Zhao Yi, Li Hao
Mechanical Properties And Acoustic Emission Characteristics Of Sandstone Under Natural And Saturated Conditions, Zhang Yin, Li Zhe, Song Shikang, Zhao Yi, Li Hao
Coal Geology & Exploration
In order to study the mechanical properties and acoustic emission (AE) characteristics of sandstone with different grain sizes in the process of damage and failure under saturated and natural conditions, we carried out uniaxial compression tests and AE tests on three kinds of sandstone under saturated and natural conditions to study the mechanical properties and AE characteristics under the uniaxial stress state. The test results show that the average compressive strength of coarse-grained sandstone, medium-grained sandstone, and fine-grained sandstone are 54.23 MPa, 53.56 MPa, 59.46 MPa respectively under natural conditions, and 35.62 MPa, 31.79 MPa and 29.10 MPa under saturated …
The Reflected Radio Wave Method For Detecting Coal Seam Faults In Mining Face, Gu Huanqi, Wu Rongxin, Shen Guoqing, Hu Ze
The Reflected Radio Wave Method For Detecting Coal Seam Faults In Mining Face, Gu Huanqi, Wu Rongxin, Shen Guoqing, Hu Ze
Coal Geology & Exploration
Mine radio wave exploration can be used for coal seam geological structure exploration. With its advantages of portability and good effect, it has become a conventional and necessary means for coal seam geological structure exploration. At present, the energy attenuation of radio wave signal in coal seam is fast, and the transmission radio wave detection of working face is restricted in large width coal seam. On this basis, the radio wave reflection exploration method of coal seam working face is proposed. Firstly, the electric model of two-dimensional coal measure strata is constructed by numerical simulation to analyze the field strength …
Down-Hole Ø550 Mm Super Large Diameter Coal Seam Borehole Drilling Technology And Equipment And Its Engineering Application, Sun Yongxin
Coal Geology & Exploration
For the prpose of improving the gas control efficiency and reduce the cost in the goaf of “U” ventilation face, the ø550 mm super-large diameter borehole was used to replace the cross-heading buried pipe for gas drainage in goaf. According to the characteristics of super-large diameter borehole and the technical problems existed in construction, a ZDY15000LP super-large diameter spiral drilling rig with maximum torque 15000 N·m, maximum penetration 700 kN, and maximum stroke 1.3 m has been developed, which adopted the two-body layout of main engine and pump station, and the innovative design of key parts such as main engine, …
Acoustic Emission Characteristics And Fracture Response Behavior Of Hard Rock-Like Material Under Influence Of Loading Rate, Zhang Zekun, Song Zhanping, Cheng Yun, Huo Runke, Song Wanxue, Wang Kuisheng, Wang Tong, Yang Tengtian, Liu Wei
Acoustic Emission Characteristics And Fracture Response Behavior Of Hard Rock-Like Material Under Influence Of Loading Rate, Zhang Zekun, Song Zhanping, Cheng Yun, Huo Runke, Song Wanxue, Wang Kuisheng, Wang Tong, Yang Tengtian, Liu Wei
Coal Geology & Exploration
For the purpose of clarifying the correlation between Acoustic Emission(AE) and rupture response characteristics and loading rate in the failure and instability of hard rocks, uniaxial compression tests and acoustic emission tests were conducted on hard rock-like material samples at different loading rates to analyze the characteristics of mechanical parameters, AE phenomena and rupture response characteristics of hard rock-like material, and to obtain the early warning information of the rock failure based on the information on AE parameters. The results show that the peak strength, elastic modulus and peak strain of hard rock-like material have the loading rate effect. The …
Effects Of The Agglomerated Fracturing Fluid On The Transportation Of Pulverized Coal And Its Mechanism, Song Jinxing, Shi Junke, Liu Jianzhuang
Effects Of The Agglomerated Fracturing Fluid On The Transportation Of Pulverized Coal And Its Mechanism, Song Jinxing, Shi Junke, Liu Jianzhuang
Coal Geology & Exploration
During the drainage process, the pulverized coal moves with the carrier fluid in supporting fractures, resulting in the blockage of the fractures and then a decrease in the permeability of the coal reservoir and the conductivity of the supporting fractures. For the purpose of exploring the effects of the properties of the agglomerated fracturing fluid on the transportation of pulverized coal and its mechanism, the coal samples from Urumqi Hedong Mining Area in southern Junggar Basin coalfield are selected as the research object, with distilled water, active water fracturing fluid(1.5%KCl), and agglomeration fracturing fluid(1.5%KCl+0.05%AN) as the carrier fluids. Through the …
Potential Of Oil-Rich Coal Resources In Shaanxi Province And Its New Development Suggestion, Ma Li, Wang Shuangming, Duan Zhonghui, Yang Fu, Fu Deliang, He Dan, Zhang Liwei
Potential Of Oil-Rich Coal Resources In Shaanxi Province And Its New Development Suggestion, Ma Li, Wang Shuangming, Duan Zhonghui, Yang Fu, Fu Deliang, He Dan, Zhang Liwei
Coal Geology & Exploration
Under the requirement of carbon peak and carbon neutral targets, the low carbon development and utilization of coal resources in Shaanxi Province is imperative. The law of tar yield from high to low in each coalfield of Shaanxi Province was revealed based on more than 5 000 sets of coal quality data: northern Shaanxi Triassic Coalfield, northern Shaanxi Jurassic Coalfield, Shanbei carboniferous Permian Coalfield, Huanglong Jurassic Coalfield, Weibei carboniferous Permian Coalfield. And three types of oil-rich coal were classified: oil-rich coal type, oil-rich coal-high oil-coal type, oil-rich coal-oil-coal type. According to the calculation method of coal resources, Shaanxi Province has …
Research On The Graphitization Potential Of Coal In Sichuan And Chongqing, Li Jing, Wang Lu, Liu Yongwang, Luan Jinhua, Zhang Ruigang, Zhang Sen, Wang Anmin
Research On The Graphitization Potential Of Coal In Sichuan And Chongqing, Li Jing, Wang Lu, Liu Yongwang, Luan Jinhua, Zhang Ruigang, Zhang Sen, Wang Anmin
Coal Geology & Exploration
The graphitization of coal is beneficial to enhancing the strategic guarantee ability of graphite resources and promoting the efficient utilization of coal measures mineral resources and transformation and upgrading of coal enterprises. The development potential of coal-based graphite resources in Sichuan and Chongqing is evaluated in the critical period of energy and mineral reform and transformation. On the basis of the analysis of coal graphitization, the precursors for coal-based carbon materials and coalfield geology, the major coal types, coal quality and characteristics of macerals, Principal Component Analysis(PCA) is applied to explore the development potential of coal-based graphite in Sichuan and …
Present Situation And Prospects Of Coal-Derived Gas Exploration And Development In Shanxi Province, Gong Jieli, Li Guofu, Li Dehui, Liu Liangliang, Wang Zheng, Xu Yun, Wang Xuchao
Present Situation And Prospects Of Coal-Derived Gas Exploration And Development In Shanxi Province, Gong Jieli, Li Guofu, Li Dehui, Liu Liangliang, Wang Zheng, Xu Yun, Wang Xuchao
Coal Geology & Exploration
Coal-derived gas includes coalbed methane(CBM), shale gas and tight sandstone gas. CBM development is of practical significance to ensure coal mine safety, increase clean energy supply, improve regional energy consumption structure, and promote the clear water and blue sky program, which is more in line with the national strategic requirements of developing green energy, achieving carbon neutrality and peaking carbon dioxide emissions. Shale gas and tight sandstone gas are of great significance to improve China’s energy structure and achieve the goal of carbon neutrality and peaking carbon dioxide emissions. Based on the comprehensive analysis of the beneficial exploration and successful …
Risk Assessment Of Water Inrush From Coal Seam Floors Based On Multiple Methods, Ren Junhao, Wang Xinyi, Wang Qi, Wang Junzhi, Zhang Bo, Guo Shuitao
Risk Assessment Of Water Inrush From Coal Seam Floors Based On Multiple Methods, Ren Junhao, Wang Xinyi, Wang Qi, Wang Junzhi, Zhang Bo, Guo Shuitao
Coal Geology & Exploration
Five factors including the thickness of the aquifer, the complexity of the fault, the water pressure of the aquifer, the unit water inflow of the aquifer, and mining height of 51 boreholes in No.2, No.10 and No.12 Coal Mines of Pingdingshan Coalfield are selected as the index factors. On the basis of the constant weight calculated by the analytic hierarchy process and grey relational analysis, the variable weights of each index factor are determined by applying the variable weight theory. By using the matter-element extension method, fuzzy variable set theory, catastrophe theory, and fuzzy comprehensive evaluation method, the water inrush …
Quantification And Mechanism Analysis Of Meso-Damage Of High-Temperature Granite Under Different Cooling Modes, Zhang Sen, Shu Biao, Liang Ming, Lu Wei, Hu Yongpeng, Xue Hui
Quantification And Mechanism Analysis Of Meso-Damage Of High-Temperature Granite Under Different Cooling Modes, Zhang Sen, Shu Biao, Liang Ming, Lu Wei, Hu Yongpeng, Xue Hui
Coal Geology & Exploration
Cooling shock is an effective method to increase the permeability of geothermal reservoir by causing fractures on high temperature rock. For the purpose of quantitatively analyze the damage degree of granite caused by cooling shock at different heating temperatures and explore the damage mechanism under the action of cooling shock, the damage of high temperature granite samples under was analyzed under natural cooling and water cooling conditions by means of thin section observation and SEM scanning technology. The results show that when the heating temperature is increased from 200°C to 800°C, the crack density of the section A at the …
Prediction Of Burnt Rock Areas And Water Abundance Based On The Electrical-Magnetic Method, Yan Shunshang, Wang Ling, Dong Fangying, Liu Xiao, Lyu Xiaolei
Prediction Of Burnt Rock Areas And Water Abundance Based On The Electrical-Magnetic Method, Yan Shunshang, Wang Ling, Dong Fangying, Liu Xiao, Lyu Xiaolei
Coal Geology & Exploration
For the purpose of accurately ascertaining the distribution range and water abundance degree of the burnt rock mass in the mining area, a new set of methods for prediction and exploration of burnt area boundaries and water-richness is presented based on overall consideration of the electrical-magnetic characteristics of the geological body. Three geophysical prospecting methods including high-precision magnetic survey, transient electromagnetic method and high-density electrical method are used for joint exploration are applied to the exploration of the burnt area of Shajihai No.1 Minefield in Xinjiang. The results show that the southern boundary of the burned area moves slightly compared …
Detection Performance Of The Azimuthal Electromagnetic Wave Logging Instrument At Coal-Rock Interface In Horizontal Wells, Zhang Yi, Kang Zhengming, Feng Hong, Han Xue, Li Fei, Li Xin
Detection Performance Of The Azimuthal Electromagnetic Wave Logging Instrument At Coal-Rock Interface In Horizontal Wells, Zhang Yi, Kang Zhengming, Feng Hong, Han Xue, Li Fei, Li Xin
Coal Geology & Exploration
The advance and accurate identification of coal-rock interfaces is one of the key technologies to realize intelligent mining, improve mining efficiency and reduce cost. Azimuthal electromagnetic wave logging has achieved good results in lithologic interface identification of petroleum logging, but the identification of coal-rock interface is seldom studied. For the purpose of studying the applicability and detection performance of azimuthal electromagnetic wave in the coalfield logging environment, the one-dimensional generalized reflection coefficient method is used to calculate the magnetic field component, and the fast Hankel transform is used to accelerate the integral calculation speed. What is more, the effects of …
Development Of A Methane Concentration Monitoring Sensor In Underground Boreholes Of Coal Mines, Cong Lin
Development Of A Methane Concentration Monitoring Sensor In Underground Boreholes Of Coal Mines, Cong Lin
Coal Geology & Exploration
At present, during underground drilling operations in coal mines, the methane concentration monitoring system can only reflect the total drainage volume of methane at the borehole, and cannot observe the effect of methane drainage of a certain section of the borehole. With the increase of the borehole depth for underground methane drainage, the effect of methane drainage changes greatly along the length of the borehole. There is a big difference in the effective extraction radius at different hole depths, leading to greater difficulty in arranging the boreholes for methane extraction, and increased uncertainty. In response to this problem, a methane …
Development And Test Analysis Of Borehole In-Situ Rock Mass Shear Measurement System, Zhang Youzhen, Liu Yanjie, Zhong Zicheng
Development And Test Analysis Of Borehole In-Situ Rock Mass Shear Measurement System, Zhang Youzhen, Liu Yanjie, Zhong Zicheng
Coal Geology & Exploration
The pre-drilled rock shear measurement system can measure the internal friction angle and cohesion of in-situ rock in mines. Compared with the traditional laboratory test and field tests, such method can keep the essential state of rock mass to the maximum extent, and obtain the test data conveniently and quickly. Firstly, the overall design idea of the system was elaborated, and the pre-drilled in-situ rock shear equipment was successfully developed and the data acquisition and storage software platform was built. Secondly, the test data processing method was developed, based on the working principle of the shearing instrument, and the specific …
Effects Of Different Tempering Temperatures On The Microstructure And Mechanical Properties Of A Low-Carbon High-Strength Steel, Lu Tian, Wen Guodong, Ma Xiaolin, Li Jun, Ju Pei, Wang Shiqing
Effects Of Different Tempering Temperatures On The Microstructure And Mechanical Properties Of A Low-Carbon High-Strength Steel, Lu Tian, Wen Guodong, Ma Xiaolin, Li Jun, Ju Pei, Wang Shiqing
Coal Geology & Exploration
The mechanical properties of low carbon high strength steel materials used in drilling equipment can be improved effectively by adjusting tempering temperatures of different heat treatments to obtain different material composition. The heat treatment and tempering temperatures were set at 610℃, 630℃ and 650 ℃ respectively, and the microstructure of this low-carbon high-strength steel was compared and analyzed by metallographic microscope and Scanning Electron Microscope(SEM). After tempering, the microhardness, tensile properties and impact energy of the structure were measured respectively by the microhardness tester, universal material testing machine and impact testing machine. The research results show that the performance of …
Removing Confederate Statues, Now What?: Sustainability And Reimagining Space, Tonya Thames Taylor
Removing Confederate Statues, Now What?: Sustainability And Reimagining Space, Tonya Thames Taylor
Sustainability Research & Practice Seminar Presentations
Professor tonya thames-taylor, History - Removing Confederate Statues, Now What?: Sustainability and Reimagining Space
The Search For Earth's Oldest Ice, John Higgins
The Search For Earth's Oldest Ice, John Higgins
Sustainability Seminar Series
Over the past eight hundred thousand years, glacial–interglacial cycles oscillated with a period of one hundred thousand years (‘100k world’1). Ice core and ocean sediment data have shown that atmospheric carbon dioxide, Antarctic temperature, deep ocean temperature, and global ice volume correlated strongly with each other in the 100k world2–6. Between about 2.8 and 1.2 million years ago, glacial cycles were smaller in magnitude and shorter in duration (‘40k world’7). Proxy data from deep-sea sediments suggest that the variability of atmospheric carbon dioxide in the 40k world was also lower than in the 100k world8–10, but we do not have …
The Role Of Place Attachment And Situated Sustainability Meaning-Making In Enhancing Student Civic-Mindedness: A Campus Farm Example, Brandon H. Sorge, Francesca A. Williamson, Grant A. Fore, Julia L. Angstmann
The Role Of Place Attachment And Situated Sustainability Meaning-Making In Enhancing Student Civic-Mindedness: A Campus Farm Example, Brandon H. Sorge, Francesca A. Williamson, Grant A. Fore, Julia L. Angstmann
Scholarship and Professional Work - LAS
This research explores the role that place attachment and place meaning towards an urban farm play in predicting undergraduate students’ civic-mindedness, an important factor in sustainability and social change. In 2017 and 2018, three STEM courses at a private university in the Midwest incorporated a local urban farm as a physical and conceptual context for teaching course content and sustainability concepts. Each course included a four to six-week long place-based experiential learning (PBEL) module aimed at enhancing undergraduate STEM student learning outcomes, particularly place attachment, situated sustainability meaning-making (SSMM), and civic-mindedness. End-of-course place attachment, SSMM, and civic-mindedness survey data were …
Green Consumption Under Carbon-Orientated: Connotation, Transmission Mechanism And Countermeasures, Hongchun Zhou, Zuoting Shi
Green Consumption Under Carbon-Orientated: Connotation, Transmission Mechanism And Countermeasures, Hongchun Zhou, Zuoting Shi
Bulletin of Chinese Academy of Sciences (Chinese Version)
As the proportion of consumption to GDP increases and its role in stimulating economic growth in China, the impact of residents' consumption has apparently become increased on resources, the environment and carbon dioxide emissions. Production is for consumption, and consumption in turn promotes production; consumption determines production and also guides the direction and development trend of production. Green consumption is not only a consumer's responsibility, but also higher requirements for producers:the entire process from raw material procurement, product production and transportation, product use, second product recycling, and final disposal must be low-carbon standards. It is very significant important to promote …
Perspective On Challenges In Accurately Estimating Remaining Carbon Budget For Climate Targets Of Paris Agreement, Tianjun Zhou, Xiaolong Chen
Perspective On Challenges In Accurately Estimating Remaining Carbon Budget For Climate Targets Of Paris Agreement, Tianjun Zhou, Xiaolong Chen
Bulletin of Chinese Academy of Sciences (Chinese Version)
In 2015, by signing up to the Paris Agreement on climate change, the United Nations Framework Convention on Climate Change (UNFCCC) parties pledged to keep global temperatures "well below" 2℃ above pre-industrial levels and to "pursue efforts to limit the temperature increase even further to 1.5℃". Limiting warming to 1.5℃/2℃ requires strictly limiting the total amount of carbon emissions between now and the end of the century. Global mean surface temperature has already witnessed a 1℃ more warming since the pre-industrial era and the cumulative anthropogenic CO2 emission has reached around 2 390 Gt CO2. An accurate estimation of the …
Alert To The Migration Of Air Pollution And Carbon Emission To Northwest China, Guiqian Tang, Yuting Liu, Wenkang Gao, Yinghong Wang, Tao Song, Mengtian Cheng, Yuesi Wang
Alert To The Migration Of Air Pollution And Carbon Emission To Northwest China, Guiqian Tang, Yuting Liu, Wenkang Gao, Yinghong Wang, Tao Song, Mengtian Cheng, Yuesi Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
Air pollutants have strong homology with greenhouse gases and are closely related to fossil fuel combustion. The high-intensity energy use in the eastern region of China has turned this region into a hot area of carbon dioxide emission and heavy air pollution in the past. Since the implementation of the Action Plan for the Prevention and Control of Air Pollution, the adjustment of industrial structure and the improvement of terminal treatment technology have been driving the succession of key species of air pollution and the spatio-temporal distribution of greenhouse gases in China. This paper analyzes the trend in major air …
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years, Elham Rahimi, Younes Shekarian, Naser Shekarian, Pedram Roghanchi
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years, Elham Rahimi, Younes Shekarian, Naser Shekarian, Pedram Roghanchi
Journal of Sustainable Mining
A retrospective study on accident analysis of the United States mines for 36 years was achieved using statistical analysis on the MSHA's accident databases between 1983 and 2018. A regression model of generalized estimation equation (GEE) was used for unbalanced panel data that provided 95,812 observations for 19,924 mine-ID-year in aggregate, coal, metal, and non-metal mines. The contributions of various parameters, including mine type, injured body part, days lost, age, and experience on the rate of accidents and injuries were investigated across the commodity types. The results showed coal miners in the East region are at a higher risk of …
Planning For Resilience And Equity Through Accessible Community Technology: A Research Agenda, Christina Rosan, Megan Heckert
Planning For Resilience And Equity Through Accessible Community Technology: A Research Agenda, Christina Rosan, Megan Heckert
Sustainability Research & Practice Seminar Presentations
Professor Christina Rosan, Temple University Department of Geography and Urban Studies, and Professor Megan Heckert, Geography & Planning - Planning for Resilience and Equity through Accessible Community Technology: A Research Agenda
America's Urban Sustainability Agenda: Advancing A Climate Of Hope, H. James Quigley Jr.
America's Urban Sustainability Agenda: Advancing A Climate Of Hope, H. James Quigley Jr.
Sustainability Seminar Series
The 20th century in the USA was characterized, among other things, by historic national movements: feminism and women's suffrage; the labor movement; civil rights; the peace movement; and the environment. Indeed, the highly pronounced trends today in urban areas of all sizes around the country of a commitment to green our architecture while expanding public housing, conserve energy, further develop renewable energy resources, green public and private transportation, recover recyclable materials from the waste stream, expand parks and open space, advance public transportation, democratize food security, make public education and health care more comprehensive, improve urban air quality, and more …
Invisible Trash: Emerging Contaminants In Streams And Rivers, Megan Fork
Invisible Trash: Emerging Contaminants In Streams And Rivers, Megan Fork
Sustainability Research & Practice Seminar Presentations
Professor Megan Fork, Biology - Invisible Trash: Emerging Contaminants in Streams and Rivers
What Tourists Want, A Sustainable Paradise, Catherine Linnes, Jerome Agrusa, Giulio Ronzoni, Joseph Lema
What Tourists Want, A Sustainable Paradise, Catherine Linnes, Jerome Agrusa, Giulio Ronzoni, Joseph Lema
Hospitality Faculty Research
The increasing complexity of tourism and sustainability offers opportunities and challenges among diverse stakeholder perspectives. The need for sustainable and nature-based approaches exists throughout the growing body of literature from among a number of dimensions and measures. One of the overarching goals of the paper is to examine whether tourists will choose a destination or hotel that is actively working to improve the environment while examining how Hawaii’s tourism is nature-based as well as other measures of sustainability while enjoying a slice of paradise in the Hawaiian Islands. This study explores tourism sustainability concerns in Hawaii, such as the influence …
Sustainable Land System Transformations In Shifting Cultivation Landscapes, Dominic Martin
Sustainable Land System Transformations In Shifting Cultivation Landscapes, Dominic Martin
Sustainability Seminar Series
During my talk, I will give a broad introduction on shifting cultivation, associated sustainability challenges, and the case of north‐eastern Madagascar. Thereafter I will focus on land system transformations in shifting cultivation landscapes – both in Madagascar and elsewhere – showing that their drivers and consequences are highly diverse and context‐dependent. This is calling for a critical and contextualized appraisal of the continuation of, as well as the transition away from shifting cultivation when designing land system
Coping With Grief And Loneliness: The Healing Power Of Green Spaces, Jasmin Tahmaseb Mcconatha, Georgina Hanna, Katherine Ford, Carolyn Cusmano, Nicole Lyman
Coping With Grief And Loneliness: The Healing Power Of Green Spaces, Jasmin Tahmaseb Mcconatha, Georgina Hanna, Katherine Ford, Carolyn Cusmano, Nicole Lyman
Sustainability Research & Practice Seminar Presentations
Professor Jasmin Tahmaseb McConatha, Psychology, with Georgina Hanna, Katherine Ford, Carolyn Cusmano, and Nicole Lyman - Coping with Grief and Loneliness: The Healing Power of Green Spaces