Results 51 to 60 of about 1,791,595 (181)
Deep Underground Science and Engineering, EarlyView.In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu +6 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.This study proposes an eco‐friendly coal permeability enhancement technique by utilizing mine waste gangue as an abrasive in high‐pressure water jets. Integrating erosion experiments with smoothed particle hydrodynamics‐finite element method coupled simulations, the research study elucidates the flow field dynamics and a nonlinear solid–liquid ...
Qingxiang Wang +4 more
wiley +1 more source
Energy Science &Engineering, EarlyView.This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley +1 more source
Design of separation system of coal and gangue based on X-ray and machine visio
Gong-kuang zidonghua, 2017 In view of problems of low efficiency, environmental pollution and high cost existed in traditional coal and gangue separation method, a separation system of coal and gangue based on X-ray and machine vision was designed.
YANG Huigang, QIAO Zhimin
doaj +1 more source
Experimental study on microwave propagation characteristics of different coal-gangue mixtures [PDF]
, 2023 The problem of coal-gangue identification is one of the technical problems that have not been effectively solved for a long time in the coal industry. By analyzing the characteristics and limitations of existing coal-gangue identification methods, the ...
Jianbo DAI +5 more
core +1 more source
Energy Science &Engineering, EarlyView.As the sublevel height increases, the top‐coal recovery amount gradually increases, but both the top‐coal recovery rate and the thickened top‐coal recovery rate show a downward trend, and the decline in the top‐coal recovery rate is gradually increasing. The comparison indicates that the optimal sublevel height is 20 m.
Hongsheng Tu +4 more
wiley +1 more source
steel research international, EarlyView.Commercial iron ore sinter is reduced isothermally under operation‐derived radial blast furnace gas atmospheres with and without 20 kg H2/tHM injection. Hydrogen improves reduction at 900–1100 °C, whereas at 700 °C the high H2O content limits the wüstite‐to‐iron driving force.
Ahmed Abdelrahim +5 more
wiley +1 more source
An improved tiny YOLO v3 rapid recognition model for coal-gangue
Gong-kuang zidonghua, 2023 The traditional coal gangue sorting methods have low efficiency, significant safety hazards, and limited application scope. The existing machine vision-based coal gangue image recognition methods are difficult to balance model recognition speed and ...
ZHENG Daoneng
doaj +1 more source
Coal gangue image recognition model based on improved U−Net and top coal caving control [PDF]
Coal gangue identification technology is a critical component for the automation of fully mechanized mining faces and represents a significant challenge within this domain.
Yong YUAN +5 more
core +1 more source
Energy Science &Engineering, Volume 14, Issue 9, Page 4470-4485, September 2026.This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin +4 more
wiley +1 more source