Results 61 to 70 of about 1,889 (217)
Energy Exploration & Exploitation, 2022 In view of solving the problems of large top coal loss and low recovery rate in the traditional caving process of horizontal section fully mechanized caving mining, taking the fully mechanized caving face of steeply inclined and extra-thick coal seam in ...
Fengfeng Wu +7 more
doaj +1 more source
Insights from the Presidential Addresses to the Agricultural Economics Society
Journal of Agricultural Economics, EarlyView.ABSTRACT The Society's published presidential addresses have embraced a wide range of subject matter, reflecting a ‘road well travelled’ in agricultural economics. The areas covered include the development and use of data and statistics, lessons from history, sectoral analysis, land economics, international trade and international development.
David Blandford
wiley +1 more source
A moving baseline for evaluation of advanced coal extraction systems [PDF]
, 1981 Results from the initial effort to establish baseline economic performance comparators for a program whose intent is to define, develop, and demonstrate advanced systems suitable for coal resource extraction beyond the year 2000 are reported.
Bickerton, C. R., Westerfield, M. D.
core +2 more sources
Heidegger and Levinas on the phenomenology of the hand: Between work and gesture
The Southern Journal of Philosophy, EarlyView.Abstract This article explores how Heidegger and Levinas develop distinct phenomenological accounts of the hand. Both thinkers refuse to treat the hand as merely an anatomical organ, instead viewing it as an essential dimension of human existence. Yet their interpretations diverge sharply. In the first section, I show how Heidegger grounds the function
Cristian Ciocan
wiley +1 more source
Mining Safety and Sustainability I [PDF]
, 2022 Safety and sustainability are becoming ever bigger challenges for the mining industry with the increasing depth of mining. It is of great significance to reduce the disaster risk of mining accidents, enhance the safety of mining operations, and improve ...
core +1 more source
Design of Initial Mining Pressure Relief Scheme for Large‐Size Mining Face: A Case Study
Engineering Reports, Volume 8, Issue 4, April 2026.The numerical simulation analysis method is used to compare the actual mining face (315 m) with the designed mining face (200 m). The results show that the large mining height working face has larger abutment pressure peak and stress concentration factor than the general mining height working face.
Qinghu Wei +3 more
wiley +1 more source
Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving [PDF]
, 2018 The main roof directly affects the stress environment and the control effect of the surrounding rock of gob-side entry driving. A mechanical model of the surrounding rock of gob-side entry driving was established to analyze the influence mechanism of ...
Gao-feng Chen +5 more
core +2 more sources
Energy Science &Engineering, Volume 14, Issue 4, Page 1808-1821, April 2026.Aiming at the difficulties in accurately calculating the movement and deformation of small‐sized, deep‐buried dams with a significant height‐to‐depth ratio in deep fully mechanized caving mining, this study proposes to separate the analysis of surface and dam deformation.
Zhang Feng +7 more
wiley +1 more source
Study on the development law of advancing support pressure on fully mechanized caving face
IOP Conference Series: Earth and Environmental Science, 2021 Abstract In order to master the law of pressure manifestation in fully mechanized caving face, numerical simulation method is adopted to establish a physical and mechanical model for analysis. The results show that the load on the working face support is mainly the deformation pressure produced by the deformation of the top coal and the ...
openaire +1 more source
Longwall Mining Stability in Take-Off Phase [PDF]
, 2013 Mechanised longwall mining is one of the more commonly employed exploitation methods in underground mines in the north of Spain as well as in the rest of the world. It is continuously changing and evolving, with new techniques, technology, equipment, and
Alcalde Gonzalo, José +4 more
core +3 more sources