Results 71 to 80 of about 652 (167)

A Polanyian Framework for Analyzing a Diverse Black‐Market Economy in Cuba

Journal of Agrarian Change, Volume 26, Issue 1, January 2026.
ABSTRACT Inspired by Carmen Diana Deere's work, we examine how planned economies, markets and communal economies interrelate to co‐produce Cuba's agricultural economy. We show the variety of noncapitalist practices interrelated with and embedded in the black market and how these interactions produce diverse ethics.
Federica Bono, John C. Finn
wiley   +1 more source

Theory and key technologies for intelligent fully-mechanized top-coal caving faces of annual production of millions of tons

Meitan kexue jishu
The research focused on addressing various challenges in intelligent top caving theory, intelligent perception and recognition key technology, intelligent caving comprehensive decision-making technology, and remote caving intelligent control technology ...
Bin YU, Yang TAI, Gang XU, Yong LI, Dongyin LI, Shibo WANG, Tiejun KUANG, Ercun MENG   +7 more
doaj   +1 more source

Distribution Characteristics of Stress Sources and Surrounding Rock Structure Control Techniques of Gob‐Side Entry Driving in Extra‐Thick Coal Seam

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
To address the challenges of surrounding rock control caused by complex stress sources and intense ground pressure in gob‐side entry driving (GED) with narrow coal pillars under extra‐thick coal seams, this study takes the 10 m‐thick coal seam 8204 panel of Tashan Coal Mine as the engineering background.
Dongjie Jiang, Guangzhong Sun, Junjie Guo, Junwen Li, Xing Xu, Qi Ma, Arnab Biswas   +6 more
wiley   +1 more source

The spatiotemporal evolution patterns of thermal environment in fully mechanized caving faces of deep mine

Thermal Science
With the increase in mine depth, the original rock temperature rises under the influence of the geothermal gradient. High temperature surrounding rock heat dissipation leads to an increase in working face temperature, seriously affecting mining production safety. Using distributed fiber optic temperature measurement to study the thermal characteristics
Shangming Liu, Li Ma, Gaoming Wei, Xixi Liu   +3 more
openaire   +1 more source

Lawnmower Poetry and the Poetry of Lawnmowers

Critical Quarterly, Volume 68, Issue 1, Page 4-42, April 2026.
Francesca Gardner
wiley   +1 more source

Research and application of top coal caving characteristics at end of fully mechanized caving working face in hard and thick coal seam with super large mining height

Meitan xuebao
Fully-mechanized caving mining with super-large mining height is an effective method for safe and efficient mining of thick and extra-thick coal seams. Aiming at the problem of poor top coal caving ability at the end of fully-mechanized caving mining in ...
Ying MA, Shijun LIU, Ziyan MA, Duanzhi MA   +3 more
doaj   +1 more source

Research on influence of coal seam thickness on caving characteristics of top-coal in inclined coal seam fully - mechanized caving faces

Meitan kexue jishu
The coal seam at the 2125 fully mechanized top-coal caving face in Hebi Coal Mine No. 6 exhibits unstable occurrence, with a thickness ranging from 0.4 m to 24 m and a dip angle varying between 8° and 35°.
Dongyin LI, Mingjin JIA, Mengguang LI, Hongbin LI, Shen WANG, Song LI   +5 more
doaj   +1 more source

Numerical Simulation Study of Support Pressure around the Fully Mechanized Caving Face

World Journal of Engineering and Technology, 2023
Peihao Li, Linchao Zhang, Pan Chi, Jinhai Gao   +3 more
openaire   +1 more source

Simulation Study of Gas Seepage in Goaf Based on Fracture–Seepage Coupling Field

Fire
In order to solve the problem of gas overrun in the fully mechanized caving face and the upper corner of high gas and extra-thick coal seam, the fracture and caving process of the roof in the goaf is analyzed and studied by using the relevant theories of
Hongsheng Wang, Huaming An, Xin Zhang
doaj   +1 more source

Mechanism and Application of Static Stress Intervention for Controlled Directional Roof Caving in Fully Mechanized Mining Faces

Processes
To address roof overhang hazards (e.g., rock bursts and gas accumulation) in high-gas coal mines, this study proposes a static stress intervention method for controlled directional roof collapse. Using the 150110 fully mechanized face at Yiyuan Coal Mine as a case study, we investigate the mechanical mechanism of static stress intervention-induced roof
Shi, Hao, Hao, Bingyuan, Ren, Xingyun, Zhang, Ji   +3 more
openaire   +1 more source