Results 31 to 40 of about 902 (192)

Research on active roof control space of fully mechanized caving support based on motion posture perception [PDF]

Meitan xuebao
The fully mechanized top-coal caving support is a critical device that serves both as a support mechanism and an active means for top-coal caving in fully mechanized top-coal caving mining operations.
Qingliang ZENG, Xiaowan LEI, Zhaosheng MENG, Lirong WAN, Xinliang BAN, Yulong HU   +5 more
doaj   +2 more sources

Theory and key technologies for intelligent fully-mechanized top-coal caving faces of annual production of millions of tons [PDF]

Meitan kexue jishu
The research focused on addressing various challenges in intelligent top caving theory, intelligent perception and recognition key technology, intelligent caving comprehensive decision-making technology, and remote caving intelligent control technology ...
Bin YU, Yang TAI, Gang XU, Yong LI, Dongyin LI, Shibo WANG, Tiejun KUANG, Ercun MENG   +7 more
doaj   +2 more sources

Coal-gangue image recognition in fully-mechanized caving face based on random forest

Gong-kuang zidonghua, 2020
Aiming at problems of high difficulty in parameter adjustment, low prediction accuracy and easy over-fitting in present coal-gangue image recognition methods in fully-mechanized caving face, a coal-gangue image recognition method in fully mechanized ...
XUE Guanghui, LI Xiuying, QIAN Xiaoling, ZHANG Yunfei   +3 more
doaj   +2 more sources

Types, occurrence mechanisms and prevention techniques of roof disasters in fully-mechanized top coal caving face

Meitan kexue jishu, 2023
The excavation thickness of the coal seam and the corresponding motion space of the overlying strata are so large in the fully-mechanized top coal caving face, that roof accidents are occur easily.
XU Gang, ZHANG Chunhui, ZHANG Zhen, LIU Xiaogang, FENG Yanjun, LIN Xingyu, MA Rongshan, LIU Qianjin, LI Zhengjie   +8 more
doaj   +2 more sources

Pumping pillar technology of fully mechanized caving face passing through abandoned roadway

Gong-kuang zidonghua, 2019
Existing working face passing through abandoned roadway based on traditional support methods cannot adapt to changeable geological conditions well. Based on research background of 8103 fully mechanized caving face of Yongdingzhuang Coal Industry Co., Ltd.
HAO Yuhui, KANG Guanxian
doaj   +2 more sources

Research on overburden structural characteristics and support adaptability in cooperative mining of sectional coal pillar and bottom coal seam [PDF]

Scientific Reports
In the mining process of the II1 coal seam at Zhaogu No. 2 coal mine, a method of stratified mining is employed, leaving relatively wide coal pillars in sections.
Du Feng, Fan Xuan, Li Zhenhua, Cao Zhengzheng, Wang Wenqiang, Lu Feifei, Jiang Yufei   +6 more
doaj   +2 more sources

Key technology of cutting roof in fully mechanized caving face with a height of 6 m

Meikuang Anquan, 2021
In order to solve the problem of roof sinking and serious floor heave caused by mining without coal pillar in No.2 coal mine of Sangshuping in Hancheng Mining Area, the field test and construction of roadway retaining along gob in fully mechanized caving coal with a height of 6 m were carried out.
HUANG Kejun, HU Junfeng, WEI Baoning, WANG Xiangyu, LYU Yuzhu
openaire   +3 more sources

Hydraulic weakening technology for unsupported top coal at the end of fully mechanized caving face

Gong-kuang zidonghua
To address the issue of excessive unsupported top coal length and delayed caving at the end of a fully mechanized caving face, a hydraulic weakening technology for face-end top coal in steeply inclined thick coal seams was proposed based on the coal ...
DONG Haofu, ZHANG Wei, SUN Guangjun, FU Huijian, LONG Zhaoxi, LIU Yang, LIU Dongliang, ZHU Xiaodong   +7 more
doaj   +2 more sources

Technology and practice of the roof-caving of hydraulic fracturing in a fully mechanized caving face

Thermal Science, 2021
A fracture expansion criterion of hydraulic fracturing was suggested to deal with the hard and stable roof control in coal mines. An experiment was designed for the roof control, and the reliability of model was verified. Four different types of fracturing holes and fracturing technology were designed in the setup room, and the hydraulic fracturing in ...
Qigen Deng, Fajun Zhao, Hong Li, Jingping Yin, Tao Zhang, Junjie Wei   +5 more
openaire   +2 more sources

Effect of Face Length in Initial Mining Stage of Fully Mechanized Top-coal Caving Face With Large Mining Height [PDF]

Geotechnical and Geological Engineering, 2021
Abstract Based on the field measurement of the end resistance of the support during the initial weighting of the basic roof and the macroscopic mine pressure behavior during the weighting period of 101,22211,103 and 301 fully mechanized caving face in Changchun Xing Coal Mine, the mine pressure law of the working face is summarized and compared,
Jianhang Wang, Yao Lu, Changxiang Wang, Guangwei Xu, Chengran Zhang   +4 more
openaire   +1 more source