Results 1 to 10 of about 257 (165)
Action recognition method for mine kilometer directional drilling rig
Gong-kuang zidonghua, 2022 At present, the walking and drilling operations of the mine kilometer directional drilling rig are all realized by the manual operation of drillers. The intelligence level is low.
XIANG Xueyi +5 more
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Key technologies of 23 000 N·m large-diameter directional drilling rig
Meikuang Anquan, 2022 According to the actual demand of high-level large-diameter directional drilling rig for underground roof in coal mine, a complete set of directional drilling rig equipment with a primary hole diameter of more than 153 mm is developed.
CHEN Zeping
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Research on rotary geosteering drilling technology and equipment in underground coal mine
Meitan kexue jishu, 2022 In view of the limitations of directional drilling technology and equipment for underground gas drainage in coal mining areas, such as low degree of automation, low drilling ratio of target formation, slow drilling rate of rock formation, and small ...
Ke YAO +7 more
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Study on long drilling long-distance fixed-point gas content measurement
Gong-kuang zidonghua, 2021 The sampling time of long drilling fixed-point gas content measurement is long. And it is unable to measure the gas content in coal seams accurately due to the absence of desorption on site. In order to solve the above problems, a method of using analogy
ZHANG Jianguo1 +3 more
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Narrow-body Directional Crawler Drilling Rig Used in Coal Mine
Meikuang Anquan, 2020 For the problems that existing directional drilling rig with a large width could not drill crossing belt borehole in conventional roadway and could not use in the drilling-excavating alternately construction, a smaller crawler directional drill rig with
LI Xiaoming, HAN Jian, YAO Yafeng
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Auxiliary adding and transporting technology of directional drill pipes
Meikuang Anquan, 2022 For the problems of high labor intensity and poor safety of manual way to add and transport the directional drill pipes in underground coal mine, based on the large diameter directional drilling rig structure layout and drilling technology ...
CHEN Zeping
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Development of ZDY15000LD High Power Directional Drilling Rig
Meikuang Anquan, 2020 To meet the needs of gas extraction, water damage prevention and detection of hidden disaster factors in the long working face of coal mine area with long distance and high efficiency, the high-power directional drilling equipment ZDY15000LD with 1 500 ...
ZHANG Rui
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Directional drilling technologies equipment and application for hard rock in underground coal mines
Meikuang Anquan, 2021 According to the problems existing in directional drilling of hard rock in coal mines, such as low drilling efficiency, easy bearing pressure in deep hole drilling and easy damage of drilling tools in hole, based on the analysis of the causes of the ...
DOU Xuqian, WANG Li
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Research on digital platform technology of directional drilling in coal mine
Meikuang Anquan, 2023 This paper analyzes the current research status of digital platforms for underground coal mine drilling in China from three aspects: digitization of measurement while drilling, digitization of drilling site environment monitoring, and digitization of ...
Qiang FAN +4 more
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Hole completion technology for high level directional long borehole in complex roof
Meikuang Anquan, 2023 Aiming at the problems existing in the construction of high directional drilling in Tingnan Coal Mine roof, such as stratum breakage in open hole section, mudstone shrinkage in directional hole section, low efficiency of two-stage reaming and easy ...
Changbao JING +4 more
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