Results 91 to 100 of about 1,192,587 (115)

Study on the Overburden Failure Law of Extra-Thick Coal Seam Mining Under Extremely Thick Conglomerate Strata

This study investigates the mining-induced overburden failure and the development law of the water-conducting fracture zone under key layer control during the extraction of an extra-thick coal seam (thickness ≥ 8 m) under extremely thick conglomerate ...
Sun Binyang, Hu Xiongwu, Fu Maoru
core   +1 more source

Study on the linkage mechanism between key strata fracture in overburden and surface subsidence during caving mining in extra-thick coal seams

Scientific Reports
Caving mining in extra-thick coal seams induces large-scale overburden movement, leading to more intense fracture processes in key strata, more significant surface subsidence, and frequent dynamic disasters in mines.
Tianwei Lan, Zhijia Zhang, Weiqiang Guo, Zhu Li, Guoqiang Wu, Ping Fang   +5 more
doaj   +1 more source

Influence of goaf inerting on the “three zones” and study on fire prevention and extinguishing technology in ultra-width working face of extra-thick coal seam

Case Studies in Thermal Engineering
Due to the thickness of the coal and the width of the working face in the extra-thick coal seam and ultra-width working face, the distribution of the oxidation zone in the goaf during mining is different from that of the conventional working face, which ...
Lei Li, Yuzhong Yang, Liyun Wu, LeQiang Zou, Yanwei Liu, Fengjie Zhang, Yaowei Zhai, Wanli Yang, Junqi Lei, Lei Peng   +9 more
doaj   +1 more source

Applications of Advanced Presplitting Blasting Technology in the Thick and Hard Roofs of an Extra-Thick Coal Seam

Based on the engineering conditions of the 1303 working face in Zhaoxian Coal Mine, this study investigates the characteristics of mine pressure behavior and the stress-relief mechanism of advanced presplit blasting in a working face with a thick and ...
Kai Zhang, Shouguo Wang, Bin Qiao, Shaoze Liu, Yingming Li, Shunjie Huang, Junpeng An   +6 more
core   +1 more source

Reduction of Stress Acting on a Thick, Deep Coal Seam by Protective-Seam Mining

, 2017
Aiming to reduce the high mining stress observed in large-space roof structures during mechanized mining of thick coal seams, a control technique based on protective-seam mining is proposed. This technique was used to investigate the 8108 working face of
Hongfei Duan, Rui Gao, Hongchun Xia, Bin Yu   +3 more
core   +1 more source

Exploration and summary of prevention and control of rock burst in steeply inclined and ultra-thick coal seam

The roof breaking movement of steeply inclined and ultra-thick coal seam mining is complex, and the evolution law of stress and energy is special. Under the influence of deep ‘three highs and one disturbance’, the prevention and control of rock burst is ...
Qiang ZHANG, Yongzhong WANG, Linming DOU, Jiang HE, Hu HE, Fangzhou LU   +5 more
core   +1 more source

Quantitative Study on the Law of Surface Subsidence Zoning in Steeply Inclined Extra-Thick Coal Seam Mining

Sustainability, 2022
The damage of overlying strata and ground surface caused by the one-time mining space is relatively severe in steeply inclined extra-thick coal seams. The unique law of surface subsidence at these conditions is still missing.
Yue-guan YAN, Yan Jun Zhang, Yuanhao Zhu
exaly   +2 more sources

Failure Mechanism and Risk Evaluation of Water Inrush in Floor of Extra-Thick Coal Seam

Water (Switzerland)
In this paper, we investigate the evolution characteristics of floor failure during pressured mining in extra-thick coal seams. A mechanical expression relating floor failure depth to seam thickness is established based on soil mechanics and mine ...
Shangxian Yin, Min Cao
exaly   +2 more sources

The Safety Guarantee Technology of Extra-thick Coal Seam Mining in Tashan Coal Mine [PDF]

Procedia Engineering, 2011
In recent years, a series of gas and spontaneous fire prevention technologies are summarized by Tashan coal mine of Datong Coal Mine Group CO.,LTD, which are suitable for extra-thick coal seam mining of carboniferous period through collaborative ...
Yongping, Wu
exaly   +2 more sources

Research on the Height of Water Flowing Fractured Zone of Fully Mechanized Caving Mining in Extra-thick Coal Seam [PDF]

Procedia Engineering, 2011
Failure height of overlying rock mass in extra-thick coal seam conditions by fully mechanized caving mining affects the groundwater occurrence condition, which in turn, affects mine safety.
Shaojie, FENG, Shiguo, SUN, Yuguo, LV, Ji, LV   +3 more
exaly   +2 more sources