Results 81 to 90 of about 902 (192)

Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways

Energy Science &Engineering, Volume 14, Issue 3, Page 1195-1212, March 2026.
Principal stress‐evolution diagram at different advance positions of 42205 working face. ABSTRACT To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in ...
Ai‐Rong Wang, Tao Peng, Kang Zhou, Chong‐Yu Song   +3 more
wiley   +1 more source

Enhancing Environmental Conservation in Recreational Sports Tourism From a Shared‐Responsibility Perspective: A Qualitative Study of Recreational Kayaking in Hong Kong

International Journal of Tourism Research, Volume 28, Issue 2, March/April 2026.
ABSTRACT Despite extensive literature on the demand for recreational sports tourism, more research is needed on stakeholders' shared responsibilities for environmental conservation. To address this gap, this study proposed an extended conceptualization of shared responsibility, examining stakeholders' perceptions, expectations and interactions in ...
Casey Wai Ki Ho, Vincent Wing Sun Tung
wiley   +1 more source

Nitrogen Injection and Fire Prevention Technology for Short Arm High Mining Height Fully Mechanized Caving Face

, 2020
To determine the important nitrogen injection process parameters, such as the reasonable nitrogen injection flow rate, the nitrogen injection pipeline spacing and the initial nitrogen injection depth in the goaf, the beam monitoring system is ...
WANG Kun
core   +1 more source

Dust Concentration Changing Regularities and Dust Reduction Technology by Spray Negative Pressure in Fully Mechanized Mining Face

, 2021
The dust concentration changing regularities are the basis to take dust depression measures, which is greatly influenced by the airflow. In the software of FLUENT, the value of ventilation velocity is set as a constant, which cannot express the real ...
Yuyan Zhuang, Lirong Wu, Shican Fu, Hongxuan Chen, Jiamin Li   +4 more
core   +1 more source

Method of tail beam posture prediction of top coal caving hydraulic support based on LSTM

Meitan kexue jishu
Fully mechanized caving is the main mining method for extra-thick coal seams in my country. The control accuracy of the caving actuator depends largely on the data feedback of the tail beam posture.
Yupeng YAO, Jinglin ZHANG, Wu XIONG
doaj   +1 more source

Study on thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata

Gong-kuang zidonghua, 2018
Taking No.12051 fully-mechanized coal face of Zhaogu No.1 Coal Mine as research object, thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata were studied by use of UDEC numerical simulation software ...
ZHAI Xinxian, LYU Chao, TANG Shijie, YU Chunsheng   +3 more
doaj   +1 more source

Agricultural System Resilience of Industrial Hemp: An Exploratory Value Web Analysis in the Swabian Alb

GCB Bioenergy, Volume 18, Issue 2, February 2026.
This study assessed the industrial hemp value web resilience in the Swabian Alb, Southern Germany, where regional implementation remains limited despite hemp's bioeconomy potential. Using an indicator framework and stakeholder interviews, the research found the small, fluctuating cultivation area (e.g., 25 ha in 2024) focuses on hemp seed valorisation;
Lena‐Sophie Loew, Moritz von Cossel
wiley   +1 more source

Research on stress distribution characteristics of coal pillar in fully mechanized caving face

Gong-kuang zidonghua, 2020
For fully mechanized caving face with high gas and fault occurrence, coal pillar with reasonable reserved width can not only support overlying strata pressure, but also isolate gas in goaf and reduce gas diffusion. However, there is a lack of research on distribution characteristics of surrounding rock stress under the condition of reasonable reserved ...
LIU Ming, CAO Minyuan, LI Bo
openaire   +1 more source

Study on Gas Drainage Technology of High-level Borehole in Fully Mechanized Caving Face

IOP Conference Series: Earth and Environmental Science, 2020
Abstract In view of the problem of gas safety in fully mechanized caving face under complex geological conditions, taking high-level borehole gas extraction as the main gas control means to improve the extraction effect and ensure gas safety during mining, this paper takes 131301 fully mechanized caving face of Xinji No.
openaire   +1 more source

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