Results 61 to 70 of about 954 (132)

Study on precise control of coal caving mechanisms based on the kinematics of support structures

Gong-kuang zidonghua
Precise control of the coal caving mechanism is a crucial foundation for realizing intelligent and unmanned top coal caving mining. The spatial relationship between the coal caving mechanism and the rear scraper conveyor, as well as the top coal ...
WANG Zuguang, WANG Shen, LI Dongyin, LI Huamin, WANG Wen, YUE Shuaishuai, LI Donghui   +6 more
doaj   +1 more source

Application of intelligent top-coal caving technology in overlying aquifer protection of extra-thick coal seam

Meitan kexue jishu
The grassland areas in eastern Inner Mongolia and northern Xinjiang are rich in coal and groundwater resources. The mining fissures formed by high-intensity coal mining are easy to lead to the strong water-rich aquifer, and it is very easy to cause the ...
Weixuan CHENG, Jingchuan CHEN, Lihui ZHANG, Shengyou LIU, Xin HE, Weidong PAN   +5 more
doaj   +1 more source

Experimental study on the evolution characteristics of dynamic load of hydraulic support top beam during coal caving

Gong-kuang zidonghua
Contact coal-gangue identification requires studying the bearing characteristics of hydraulic support top beams in fully mechanized top coal caving. However, existing research primarily focuses on the bearing characteristics of supports before and after ...
HUO Yuming, HU Wenshuo, GAO Peng, YAN Chuan   +3 more
doaj   +1 more source

Impact of surface irregularities on coal wall stability and support mechanisms: Insights from physical and numerical experiments

International Journal of Mining Science and Technology
Coal wall stability is a critical factor influencing coal mining efficiency and threatens the safety of working faces, where irregular coal wall surfaces significantly affect the contact and support effectiveness of the support plate, thereby impacting ...
Jiachen Wang, Xiang Yu, Zhong Huang, Lianghui Li, Yubing Wang   +4 more
doaj   +1 more source

Distribution of spontaneous combustion three zones and optimization of nitrogen injection location in the goaf of a fully mechanized top coal caving face. [PDF]

PLoS One, 2021
Qi Y, Wang W, Qi Q, Ning Z, Yao Y.
europepmc   +1 more source

Current status and prospects of surrounding rock control and intelligent coal drawing technology in fully mechanized caving face

Gong-kuang zidonghua
This paper analyzes the current status and existing issues in the control technology of surrounding rock and intelligent top coal caving technology for thick and ultra-thick coal seams in fully mechanized caving faces.
PANG Yihui, GUAN Shufang, JIANG Zhigang, BAI Yun, LI Peng   +4 more
doaj   +1 more source

Technology Research on the Fourth Panel Mining Large Height Fully-mechanized Caving Mining in Shangwan Coal Mine

MATEC Web of Conferences, 2015
According to the characteristics of the 1-2 coal seam of Shangwan coal mine 4th panel, this research analyzed the feasibility of sublevel caving hydraulic support in the fully-mechanized mining face through estimation method and numerical simulation ...
Liu Yingjie, Wang Xiaomou
doaj   +1 more source

Some key problems on estimation of height of water-conducting fractured zone for thick coal seam top coal caving

矿业科学学报
The height of water-conducting fractured zone is an important indicator for ensuring safe mining of coal resources under water bodies. In view of the problems and deficiencies to quote empirical formula for top coal caving in thick coal seams, the basis ...
CUI Ximin, CHE Yuhang, SUN Shuaihui, LI Peixian, SUN Hao, XU Zhihua, YUAN Debao, JIANG Jinbao, ZHAO Yuling, MALINOWSKA A   +9 more
doaj   +1 more source

Research progress on intelligent coal caving theory and technology

Gong-kuang zidonghua
The longwall top-coal caving technology is an effective method for extracting thick and ultra-thick coal seams, and it has become a hallmark technology in China's coal mining industry.
WANG Jiachen, YANG Shengli, LI Lianghui, ZHANG Jinwang, WEI Weijie   +4 more
doaj   +1 more source

Characterization and simulation of the coal-rock boundary equation on the upper and lower sides of the inclined coal caving opening

Meitan kexue jishu
In order to explore the top coal release law of the fully mechanized top coal caving face under different inclination angles, taking the 0291 fully mechanized caving face of Tangshan Mine as the research background, a comprehensive research approach ...
Guanghua ZOU, Jiannan YANG, Shufang GUAN, Zhigang JIANG, Mingqiang WANG, Haoyu SHI   +5 more
doaj   +1 more source