Results 41 to 50 of about 33,183,762 (290)

Analysis and Engineering Practice of Factors Affecting Top-Coal Recovery in a Large Dip Coal Seam

Advances in Civil Engineering, 2022
The recovery of top coal in the caving face directly impacts the efficiency of mining coal resources. The geological conditions and mining parameters are well known to be significant influences on the recovery of top coal. This study focused on the 9-301
Xinglong Huang, Ying Chen, Yang Li, Fengshuo Jia, Shengjian Liang, Xiufeng Zhang, Yang Chen, Qianjia Hui, Zhiwen Wang, Zhaoju Zhang, Zhijie Zhu, Dequan Sun   +11 more
doaj   +1 more source

Research on the intelligent coordinated top-coal caving model and key technologies in extra-thick coal seams

河南理工大学学报. 自然科学版
ObjectivesFully mechanized top-coal caving is a safe and efficient mining method for extra-thick coal seams. However， the complexity of the caving environment， the challenges in coordinating mining and caving， and the numerous factors influencing caving ...
LI Dongyin, WANG Zuguang, WANG Shen, LI Huamin, PENG Weiping, LI Hongbin, ZHANG Guopeng, ZHANG Xuhe   +7 more
doaj   +1 more source

Influence of particle characteristics on dynamic characteristics of tail beam under coal rock caving impact

Frontiers in Energy Research, 2022
In order to improve the accuracy of simulation parameters used in the discrete element simulation test of a fully mechanized top-coal caving process and further explore the intelligent fully mechanized coal caving technology, this research work studies ...
Lijuan Zhao, Lijuan Zhao, Liguo Han, Haining Zhang, Man Ge, Shijie Yang, Xin Jin   +6 more
doaj   +1 more source

The Recent Progress China Has Made in Mining Method Transformation: Part II Sublevel Caving Method Transformed into Backfilling Method

Applied Sciences
As the world’s largest resource production and consumption country, China is rich in mineral resources, but its per capita occupancy is lower than the world average.
Shuai Li, Zhenzhong Xiang, Zhenyu Dan, Tubing Yin, Junyu Chen   +4 more
semanticscholar   +1 more source

Beyond Canonical CO Oxidation: Structural and Evolutionary Insights Into a Non‐Canonical Carbon Monoxide Dehydrogenase

Angewandte Chemie, EarlyView.
Clade B carbon monoxide dehydrogenases (CODHs) remain enigmatic, diverging from canonical CODHs in structure and function. Here, we present the first characterization of Ruminococcus flavefaciens CODH (RfCODH), revealing occluded substrate pathways and attenuated CO oxidation activity.
Maximilian Böhm, Vivek Srinivas, Benjamin Wiseman, Ping Huang, Moritz Senger, Martin Högbom, Henrik Land   +6 more
wiley   +2 more sources

Procedure Design and Reliability Analysis for Prediction of Surface Subsidence of a Metal Mine Induced by Block Caving Method—A Case Study of Pulang Copper Mine in China

Minerals
Surface subsidence resulting from block caving mining causes considerable environmental and economic harm in mining areas, highlighting the critical need for accurate predictions of surface subsidence.
Weijia Ling, Zhonghua Zhu, Xinglong Feng, Liguan Wang, Weixiong Wang, Zhengrong Li, Jiadong Qiu   +6 more
semanticscholar   +1 more source

Intelligent decision-making method for coal caving based on fuzzy deep Q-network

Gong-kuang zidonghua, 2023
During the coal caving process in the fully mechanized caving face, due to the impact of coal dust and dust water mist on the workers' line of sight, there are problems of over-caving and under-caving in manually controlled coal caving. In order to solve
YANG Yi, WANG Shengwen, CUI Kefei, FEI Shumin   +3 more
doaj   +1 more source

Study on Bottom Damp‐Proof Method of Cave Dwelling [PDF]

Advances in Civil Engineering, 2018
The cave dwelling, as one of the most typical and traditional characteristic local housing styles in the loess area of Northwest China, has been adopted widely in many areas since ancient times. The construction of the cave dwellings supports environmental protection, makes use of innovative construction technology, and preserves historical cultural ...
Rong Wan, De-quan Kong, Li-xin Zhang
openaire   +2 more sources

Prediction of gas emission from floor coalbed of steeply inclined and extremely thick coal seams mined using the horizontal sublevel top-coal caving method

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
In the steeply inclined and extremely thick coal seams (SIETCS) mined using the horizontal sublevel top-coal caving (HSTCC) method, the uncertainty of gas emission is a safety threat to the mining operations.
Yanwei Hu, Gang Wang, Jianqiang Chen, Zhiyuan Liu, Cheng Fan, Qian Cheng   +5 more
semanticscholar   +1 more source

Research on the characteristics of the falling behavior of mixed coal and gangue

Gong-kuang zidonghua
Traditional studies on the dynamic characteristics of coal flow during the top coal caving process, based on image detection technology, have primarily focused on specific-stage image analysis, lacking a comprehensive analysis of dynamic characteristics ...
SHAN Pengfei, YANG Tong, SUN Haoqiang, XI Bojia   +3 more
doaj   +1 more source