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Progress of drilling technologies and equipments for complicated geological conditions in underground coal mines in China
YAO Ningping, WANG Yi, YAO Yafeng, SONG Haitao, WANG Li, PENG Tao, SUN Xinsheng
2020, 48(2): 1-7. DOI: 10.3969/j.issn.1001-1986.2020.02.001
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ATO mode-based modular platform development of variable luffing crawler drilling rig used in underground coal mine
SONG Haitao, YAO Ningping, YAO Yafeng, HAN Jian, PENG Tao
2020, 48(2): 8-13,19. DOI: 10.3969/j.issn.1001-1986.2020.02.002
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Development situation and prospect of luffing mechanism of drilling rig in underground coal mine
YAO Yafeng, YAO Ningping, PENG Tao
2020, 48(2): 14-19. DOI: 10.3969/j.issn.1001-1986.2020.02.003
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Key technology for rapidly drilling large diameter destressing-drillhole in rockburst coal seam
WEI Hongchao, WANG Yi, WANG Bo
2020, 48(2): 20-24. DOI: 10.3969/j.issn.1001-1986.2020.02.004
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Foam drilling technology and application for broken soft coal seam in underground coal mine
JI Qianhui, DONG Mengmeng, LIU Jianlin, SHI Lei
2020, 48(2): 25-29. DOI: 10.3969/j.issn.1001-1986.2020.02.005
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Development of small diameter hydraulic agitator with cable for directional drilling in underground coal mine
WANG Li, XU Baolong, WANG Yi, HUANG Hanjing, JIA Mingqun, MA Bin
2020, 48(2): 30-35,41. DOI: 10.3969/j.issn.1001-1986.2020.02.006
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Directional drilling technology and equipment of pneumatic screw motor in soft seam
ZHANG Jie, WANG Yi, HUANG Hanjing
2020, 48(2): 36-41. DOI: 10.3969/j.issn.1001-1986.2020.02.007
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Distribution and resource prospect of metal ore spots(deposits) in coal of different coal-forming ages in northern China
NING Shuzheng, HUANG Shaoqing, ZHANG Li, HUANG Wenhui, CAO Daiyong, YUAN Jianjiang, ZHANG Jianqiang, ZHU Shifei, YAN Deyu, LIU Kang
2020, 48(2): 42-48. DOI: 10.3969/j.issn.1001-1986.2020.02.008
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Discussion and application of geological evaluation index of scarce coal injected into blast furnace
QIAO Junwei, LI Zhengyue, CHEN Meiying, LYU Jun'e
2020, 48(2): 49-56. DOI: 10.3969/j.issn.1001-1986.2020.02.009
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The potential of clean utilization of coal resources in main coalfields of Henan Province
ZHAO Mingzhen
2020, 48(2): 57-63. DOI: 10.3969/j.issn.1001-1986.2020.02.010
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Solid-liquid migration of molybdenum in stone coal and coal ash in southern Shaanxi
ZHANG Weiguo, LI Huantong, WANG Feng, YANG Fu, TENG Jinxiang
2020, 48(2): 64-70. DOI: 10.3969/j.issn.1001-1986.2020.02.011
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Petrographic, quality characteristics and clean & efficient use of Jurassic coal in Ningdong coalfield
DU Fangpeng, LUO Zheng, QIAO Junwei, ZHAO Xiaochen, TAN Furong, LI Congcong, FAN Qi
2020, 48(2): 71-77. DOI: 10.3969/j.issn.1001-1986.2020.02.012
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Causes of anomaly of rare earth elements of seam 2 of Yan'an Formation in the northern margin of Ordos basin and its geological significance
YANG Yi, LYU Dawei, ZHANG Jianqiang, WU Dun
2020, 48(2): 78-84. DOI: 10.3969/j.issn.1001-1986.2020.02.013
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Characteristics of tectonic evolution of Carboniferous-Permian coal measures in the north-central Qinshui basin
LIN Zhongyue, LIU Kang, WEI Yingchun
2020, 48(2): 85-91. DOI: 10.3969/j.issn.1001-1986.2020.02.014
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Mineralogical characteristics and genesis of the illite in Jurassic coal of the Jingxi coalfield, North China
HUANG Bo, ZHENG Qiming, SHI Songlin
2020, 48(2): 92-98. DOI: 10.3969/j.issn.1001-1986.2020.02.015
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Changes of petrographic characteristics and quality of contact-metamorphosed coals in the Datong coalfield
MA Hongtao, SONG Xiaoxia, LI Kaijie, ZHAO Jingui, ZHANG Tianguang, LIU Jianping
2020, 48(2): 99-105. DOI: 10.3969/j.issn.1001-1986.2020.02.016
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Numerical simulation of layer-crossing propagation behavior of hydraulic fractures at coal-rock interface
LI Haozhe, JIANG Zaibing, SHU Jiansheng, FAN Yao, DU Tianlin
2020, 48(2): 106-113. DOI: 10.3969/j.issn.1001-1986.2020.02.017
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Influencing factors of the dynamic permeability of CBM reservoir and CBM well drainage control measures
WANG Qing, YANG Fei, GONG Weicheng, XU Tianxin, LI Yichao
2020, 48(2): 114-119. DOI: 10.3969/j.issn.1001-1986.2020.02.018
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Effect of white rot fungi pretreatment on methane production from anaerobic fermentation of coal
ZHANG Huaiwen, HUANG Song, YAN Xiatong, ZHAO Shufeng, ZHANG Minglu, XIA Daping
2020, 48(2): 120-125. DOI: 10.3969/j.issn.1001-1986.2020.02.019
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Dynamic evolution law of water accumulation range in coal mining subsidence area with high-level groundwater
CHEN Xiaoxie, ZHANG Wentao, ZHU Xiaojun, LIU Hui, ZHANG Min, SUN Aiguo, YANG Xiaoyu
2020, 48(2): 126-133. DOI: 10.3969/j.issn.1001-1986.2020.02.020
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Preparation of underwater quick-set and expansion polyurethane grouting material and its properties
YANG Zhu, XUE Ren, WANG Jun, LAN Zhili
2020, 48(2): 134-140. DOI: 10.3969/j.issn.1001-1986.2020.02.021
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Classification of hidden faults in coal seam floor and measures for water inrush prevention
LIU Zewei, LIU Qisheng, LIU Yang
2020, 48(2): 141-146. DOI: 10.3969/j.issn.1001-1986.2020.02.022
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Application of MJS construction method in gravel layer and pile forming difference
ZHANG Yan, TIAN Zenglin, CAO Haidong, DANG Yakun, WANG Hai, LI Heping, HAN Qiang
2020, 48(2): 147-151,160. DOI: 10.3969/j.issn.1001-1986.2020.02.023
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Negative power rock strength criterion under conventional triaxial compression
LI Bin, WANG Daguo
2020, 48(2): 152-160. DOI: 10.3969/j.issn.1001-1986.2020.02.024
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The microscopic fabric characteristics of biaxial compression test of typical argillaceous siltstone in Badong Formation
XIAO Zunqun, WANG Xin, TANG Dongsang, DONG Qiongying, JIANG Yinan, YANG Kai, CAO Tongtong, DENG Zhen
2020, 48(2): 161-170. DOI: 10.3969/j.issn.1001-1986.2020.02.025
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Collapses of loess at the front of the Emei tableland in the Yuncheng basin and their major geological controlling factors
LI Zhenhong, JIANG Boyu, DONG Xiaopeng, YANG Yong, CUI Jiawei, GONG Wangbin
2020, 48(2): 171-178. DOI: 10.3969/j.issn.1001-1986.2020.02.026
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Numerical simulation of propagation law of pore-fracture under uniaxial stress
GUO Xiucheng
2020, 48(2): 179-186,194. DOI: 10.3969/j.issn.1001-1986.2020.02.027
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Creep acoustic emission and fractal characteristics of coal rock under high temperature pre-damage
SHI Hongcai
2020, 48(2): 187-194. DOI: 10.3969/j.issn.1001-1986.2020.02.028
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Influencing factors of thermal conductivity of cementing materials for geothermal wells
ZHANG Hao, XU Shuanhai, YANG Yu, HAN Yongliang, ZHANG Weidong, LI Yongqiang
2020, 48(2): 195-201. DOI: 10.3969/j.issn.1001-1986.2020.02.029
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Joint correction method of errors of MWD inclinometer in underground coal mine
QIAO Meiying, WANG Bo, XIAO Xuejun, XU Chengkuan, YAN Shuhao
2020, 48(2): 202-208. DOI: 10.3969/j.issn.1001-1986.2020.02.030
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Application of Simulink in transient process analysis of transient electromagnetic field
LIU Shilei, ZHANG Ying, YUE Jianhua
2020, 48(2): 209-215. DOI: 10.3969/j.issn.1001-1986.2020.02.031
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Progress in research of in-seam seismic exploration
GUO Yinjing, JU Yuanyuan, FAN Xiaojing, ZHANG Jianhua
2020, 48(2): 216-227. DOI: 10.3969/j.issn.1001-1986.2020.02.032
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Research and application of mine distributed seismic advance detection system
DOU Wenwu, WEI Jinshan, JIAO Yang, YANG Gaofeng, JI Zeyu
2020, 48(2): 228-234. DOI: 10.3969/j.issn.1001-1986.2020.02.033
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