Results 61 to 70 of about 7,615,775 (267)

Design of automation control system of fully-mechanized coal face

, 2015
In order to realize collaborative automation running of equipments on fully-mechanized coal face, an automation control system of fully-mechanized coal face was designed, composition and function realization of three machine control system, belt conveyor
PENG Qingguo, ZHENG Jiasong, SU Zhengfei, ZHANG Xiansheng, DING Congshi, ZHANG Xianyu, LYU Lei   +6 more
core   +1 more source

Dynamic Evolution Law of Overburden Rock in Shallow-Buried Super-High Fully Mechanized Working Face and Determination of Support Strength

, 2021
The objective of this study was to reveal the law of overburden movement and stress evolution during the mining of super-high fully mechanized mining faces.
Youxin Zhao, Anhu Wang, Yingjie Liu, Qingjie Qi, Haijun Wang   +4 more
core   +1 more source

Differentiated Impacts of EU Rural Development Measures: A Finite Mixture Evaluation of Italian Olive Farms

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT This paper examines the relationship between participation in the EU Rural Development Program and the economic performance of Italian olive farms using a finite‐mixture model with inverse‐probability‐weighted regression adjustment. Based on 2010–2022 FADN panel data, it estimates heterogeneous treatment effects while correcting for selection ...
Francesco Caracciolo, Marilena Furno
wiley   +1 more source

Evolution characteristics of overburden structure in inclined fully mechanized caving under residual coal pillars of the upper layer

Gong-kuang zidonghua
In the stratified fully mechanized caving of ultra-thick coal seams, the inclined layout of upper and lower caving faces leads to lower fully mechanized caving face intermittently crossing residual coal pillars of the upper layer. This results in complex
LIU Yong, WANG Hongwei, WU Xuesong, TIAN Chengpeng, GUAN Rongfu, NIE Yunxiao, FAN Zhiwei, CAO Peipei   +7 more
doaj   +1 more source

Research on key technology of intelligent fully mechanized caving face construction in Baode Coal Mine

, 2023
The current research achievements in the construction of intelligent fully mechanized caving face lack systematic implementation case for a specific fully mechanized caving face.
WANG Zhiqiang, WU Xicang, RUAN Jinlin, ZHANG Xueliang   +3 more
core   +1 more source

Agricultural Diversification at the Margin. Strategies and Determinants in Italian Mountain and Remote Areas

Agribusiness, EarlyView.
ABSTRACT This paper explores the convergence in on‐farm diversification strategies of agricultural holdings, between remote areas and more central ones. Using Italian farm‐level data, we explore the determinants of diversification strategies across farms.
Gianluca Grilli, Francesco Pagliacci, Paola Gatto   +2 more
wiley   +1 more source

Positioning system of fully mechanized working face based on UWB and laser ranging

Gong-kuang zidonghua, 2021
Traditional wireless positioning technology has low accuracy, and UWB positioning technology can achieve centimeter-level high-precision positioning to meet the accuracy requirements of the fully mechanized working face positioning systems. However, the existing researches ignore the impact of position change of the base station installed on the ...
NIU Yonggang,, DOU Xueli,, YIN Peng,, LI Jingsheng,, LUAN Liangliang,, LAN Xiang   +5 more
openaire   +1 more source

Control Mechanism and Support Technology of Soft Coal Roadway in the Fully Mechanized Mining Work Face

Geo-Resources Environment and Engineering, 2017
Aiming at characteristics of the soft coal roadway engineering geology and deformation, the exposure research of the soft coal seam, theoretical analysis, numerical calculation and program design were carried out. First of all, according to the disclosure, soft coal seam engineering characteristics and geological conditions in Xinxing coal mine were ...
Genshui Wu, Weijian Yu, Jian Zhang, Yong Ning   +3 more
openaire   +2 more sources

Deforestation and Efficiency: Insights From Forest Transition in the Brazilian Cerrado

Agribusiness, EarlyView.
ABSTRACT This paper estimates technical efficiency (TE) and environmental efficiency (EE) of agricultural production at the municipal level of the Brazilian Cerrado in 2006 and 2017, and investigates their underlying mechanisms in relation to forest transition theory.
Ricardo Muniz Simões, Cassiano Bragagnolo, Humberto Francisco Silva Spolador   +2 more
wiley   +1 more source

Research on key technologies of intelligent fully mechanized mining on working face with large mining height

, 2018
In order to solve problems of large number of workers and high labor intensity on fully mechanized mining face with large mining height, according to actual situation of No.2 Coal Mine of Huangling Mining Group Co., Ltd., technical difficulties such as ...
FAN Jingdao
core   +1 more source