Results 131 to 140 of about 140,971 (281)

Research on deformation and failure characteristics of overburden and surface in high-intensity mining of Caojiatan Coal Mine

Meikuang Anquan
Under high-intensity mining conditions, the structural response of overburden is severe, significantly affecting the safety of surface structures. Taking the 122104 super-large mining height working face of Caojiatan Coal Mine in the Yushen Mining Area ...
Zhaolai HUA, Yang LYU, Shengxiang GAO, Zehui WU, Xufeng WANG, Lei ZHANG   +5 more
doaj   +1 more source

Research on Distribution Regularities of Dust Concentration and Granularity in Large Mining Height Working Face

World Journal of Engineering and Technology, 2023
Daqing Li, Qingyi Tu, Yang Yang
openaire   +1 more source

Англійська мова для навчання і работи. Навчальний посібник з англійської мови за професійним спрямуванням для студентів і фахівців галузі знань 0503 Розробка корисних копалин Т 1 [PDF]

, 2010
A coursebook includes all the activities of students’ work at ESP course aimed at development of language behaviour necessary for effective communication of students in their study and specialism areas.
Зуєнок, І.І., Кострицька, С.І., Поперечна, Н.В., Швець, О.Д.   +3 more
core  

Characterization of a two‐phase hybrid flotation column

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study explored the performance of a novel hybrid flotation column, which combines the advantages of a mechanically agitated cell with a flotation column and compared the results with a conventional flotation column setup. The experiments were performed in an air/water two‐phase system under varying airflow rates, frother concentrations ...
Pedro Silva Aires, Artin Afacan, Qi Liu, Vinay Prasad   +3 more
wiley   +1 more source

Tunable amylopectin graft copolymers for flocculating and dewatering iron ore tailings

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Polyacrylamide (PAM), the standard flocculant for mining tailings, often produces turbid supernatants and poorly dewatered sediments, limiting water reuse and tailings densification. We synthesized amylopectin‐graft‐poly[(2‐methacryloyloxy)ethyl]trimethylammonium chloride (AP‐g‐PMETAC) copolymers with systematically varied graft frequency (N = 
Gustavo P. Zago, Reinaldo Giudici, João B. P. Soares   +2 more
wiley   +1 more source

Sudan at War With Itself: Civilian Devastation in the Civil War

Conflict Resolution Quarterly, EarlyView.
ABSTRACT A civil war is raging in Sudan between the Sudan Armed Forces (SAF) and the Rapid Support Forces (RSF) along with militia groups. Beginning on April 15, 2023, and continuing at least to this writing (October 15, 2025), civilian noncombatants have been subjected to bombings, beatings, torture, shootings, rape, and murder on a large scale. Since
Daniel Rothbart, Bayan Abubakr, Beltina Gjeloshi, Dieter Pfoser   +3 more
wiley   +1 more source

Characteristics of pressure relief gas enrichment zones in overlying strata during high-strength mining based on elliptical-parabolic zone theory

Meitan kexue jishu
With the deepening and high-strength development of coal resource mining, gas issues and safety hazards in the mining process become increasingly prominent.
Haiqing SHUANG, Jiatao ZHANG, Shugang LI, Haifei LIN, Bin ZHOU, Peiyun XU, Pengxiang ZHAO, Peizhen ZHANG   +7 more
doaj   +1 more source

Voices From the Congo Basin: Incorporating the Perspectives of Local Stakeholders for Improved REDD Design [PDF]

, 2009
Presents the concerns of the Congo Basin's local and indigenous communities, community NGOs, and parliament members over the design and implementation of Reduced Emissions from Deforestation and Forest Degradation such as inequitable revenue ...
Felicien Kabamba Mbambu, Fred Stolle, Guy Patrice Dkamela, Kemen Austin, Susan Minnemeyer   +4 more
core  

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

Shuttle car loading system [PDF]

, 1985
A system is described for loading newly mined material such as coal, into a shuttle car, at a location near the mine face where there is only a limited height available for a loading system.
Collins, E. R., Jr.
core   +1 more source