one kind of borehole hydraulic coal mining system

Research on One Borehole Hydraulic Coal Mining System
2008.7.1 The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then the mixture of coal and water as slurry are driven out of the borehole by hydraulic or air-lifting
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Research on One Borehole Hydraulic Coal Mining System
2008.7.1 The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then
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Borehole hydraulic coal mining system analysis - NASA
The borehole hydraulic coal mining system accesses the coal seam through a hole drilled in the overburden. The mining device is lowered through the hole into the coal seam where it
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Research on One Borehole Hydraulic Coal Mining System
Semantic Scholar extracted view of "Research on One Borehole Hydraulic Coal Mining System" by B. Xia et al.
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Review of the Borehole Hydraulic Coal Mining System. Final
The borehole hydraulic coal mining system accesses the coal seam through a hole drilled in the overburden. The mining device is lowered through the hole into the coal seam where it
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In-situ experimental study on hydro-borehole technology
2023.1.21 The hydro-mining technology is considered as a promising method of bituminous coal excavation. The paper presents the results of the in-situ experimental
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Review of the borehole hydraulic coal mining system. Final
The U.S. Department of Energy's Office of Scientific and Technical Information
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Design and field evaluation of hydraulic fracturing boreholes
2024.9.20 Usually, the hydraulic fracture borehole for coal roof pressure relief is designed as an L-borehole and S-borehole, where the vertical height of the L-borehole is similar to or
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Evaluation of Borehole Hydraulic Fracturing in Coal Seam
2020.11.17 Accurate evaluation of the influence range of borehole hydraulic fracturing (HF) in coal seam is crucial for optimizing the design scheme of HF. In this study, we adopted the
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Research on One Borehole Hydraulic Coal Mining System
2008.7.1 The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then
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Experimental research on the performances of water jet
2018.6.20 Oil shale is an unconventional energy source, and it is also a potential petroleum substitute. Nowadays, the energy shortage is becoming more and more prominent, oil shale has attracted the attention of energy researchers all over the world. Borehole hydraulic mining is an effective method to exploit the underground oil shale which has more prominent advantages
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Design and field evaluation of hydraulic fracturing boreholes
2024.9.20 Usually, the hydraulic fracture borehole for coal roof pressure relief is designed as an L-borehole and S-borehole, where the vertical height of the L-borehole is similar to or lower than the ...
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Hydraulic borehole mining (Conference) - OSTI.GOV
@article{osti_5073566, title = {Hydraulic borehole mining}, author = {Evers, J L and Knoke, G S}, abstractNote = {The Department of Energy is currently funding a program to develop a borehole mining system that accesses the mineral seam through a small hole drilled through the overburden, remotely crushes the material with a high pressure water jet, and then transports
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(PDF) Optimizing the Structure of the Straight Cone Nozzle
2017.12.1 In borehole hydraulic mining, hydraulic coal mining and high-pressure jet grouting technologies follow the same basic principles of using high-pressure jets to break the ore bed or the r ock and ...
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Selecting the Optimal Borehole Drilling Pattern for Methane
2023.12.6 The emission of gas from the coal seams is one of the most important issues during the underground coal mining operation. Each year, coal gas emission from the underground stopes leads to the death of a large number of miners and is one of the biggest threats to workplace safety. In addition, ventilating and releasing coal gas outside of the mine
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Recognition of Weak Microseismic Events Induced by Borehole Hydraulic ...
2023.12.21 Borehole hydraulic fracturing in coal mines can effectively prevent coal rock dynamic disasters. Accurately recognizing weak microseismic events is an essential prerequisite for the micro-seismic ...
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In-Situ Leaching Borehole Mining - 911Metallurgist
2019.1.14 One patent using hydraulic jets for underreaming wells was also evaluated. Field applications of the borehole technique evaluated included the initial U.S. test conducted in 1961 by the American Gilsonite Co., at Bonanza, Utah, and the hydraulic borehole coal mining conducted by Coleman Collieries Ltd., at the Vicary Creek mine near Coleman ...
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Optimizing the Structure of the Straight Cone Nozzle and
2021.10.12 Oil shale is a kind of potential alternative energy source for petroleum and has attracted the attention of energy researchers all over the world. Borehole hydraulic mining has more prominent advantages than both conventional open-pit mining and underground mining. It is very important to attempt to use the borehole hydraulic mining method to exploit underground
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Investigation of Large‐Diameter Borehole for Enhancing
2020.12.30 In the site of underground coal mine, the commonly used drilling diameter is 94 mm and 133 mm. The diameter of large-diameter borehole experimented in Zhongxing Coal Mine is 300 mm. For comparison, the diameter of 200 mm as a transition is added. Hence, the borehole diameter scheme (94-133-200-300 mm) is selected.
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GitHub - dcstechnoweb/The-Reason-Why-Everyone-Love-Mining
• Hydraulic Mining- this is an obsolete system that involves jetting the side of a mountain or hill with high-pressure water to expose gold and another precious essence. • Dredging- it involves the junking of jewels, beaches, and ground underneath a body of water to expose the minerals. • Open hole- this is the most common mining system.
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(PDF) A new cross‐borehole hydraulic caving technique in the coal
2020.1.16 The research results show that the threshold value of incident pressure for punching and breaking coal in the No. 3 coal seam of Changping Coal Mine is 4.26 MPa, the reasonable hydraulic punching ...
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Optimizing the Structure of the Straight Cone Nozzle
2017.12.30 2. Overview of the Borehole Hydraulic Mining Technology In borehole hydraulic mining, hydraulic coal mining and high-pressure jet grouting technologies follow the same basic principles of using high-pressure jets to break the ore bed or the rock and soil mass [13–15]. Borehole hydraulic mining technology is used for the in-situ mining of ...
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Field investigation of multi-stage pulse hydraulic
2023.10.19 Field investigation of multi‑stage pulse hydraulic fracturing for improving permeability of coal seam in directional long borehole in underground coal mines Xinglong Zhao1 Bingxiang Huang1 Haoze Li1 Shuliang Chen2 Received: 29 May 2023 / Accepted: 23 September 2023 / Published online: 11 October 2023
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Hydraulic borehole mining for pitching coal seams. Final
@article{osti_6287667, title = {Hydraulic borehole mining for pitching coal seams. Final report. [Double drill method]}, author = {Knoke, G S and Scott, L E and Archibald, W R}, abstractNote = {This project was undertaken to extend the vertical borehole mining concept to the new tool configurations needed to economically mine pitching coal seams.
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Technology and application of through layer borehole ultra
2024.10.8 Finally, combined with the field test, the parameters of UPHS were determined, and difference in gas drainage effect between contrast borehole and UPHS was investigated. It is found that the exposed area of coal increased due to macroscopic slotting formed by hydraulic slotting, which provide space for coal deformation.
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A new cross‐borehole hydraulic caving technique in the coal
2020.1.16 Predrainage of gas by cross‐boreholes is an important method to prevent coal and gas outbursts in the process of a coal roadway excavation. Limitations of technologies and poor effects of preventing coal and gas outbursts occur in the coal seam with a soft layer. In this study, a new hydraulic caving technology for cross‐boreholes has been proposed to solve this
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Borehole hydraulic coal mining system analysis - NASA
The borehole hydraulic coal mining system accesses the coal seam through a hole drilled in the overburden. The mining device is lowered through the hole into the coal seam where it fragments the coal with high pressure water jets which pump it to the surface as a slurry by a jet pump located in the center of the mining device. The coal slurry is then injected into a pipeline for
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Experimental research on the performance of water jet
2018.6.20 mining, in-situ mining, and borehole hydraulic mining. Among these four mining methods, borehole hydraulic mining technology is the especially suitable for mining deep and low-grade
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In-situ experimental study on hydro-borehole technology
2023.1.21 Duncan, G. J. Hydraulic coal mining developments in New Zealand. Solid Energy (1998). Whittall, P. Pike River Coal—Hydraulic Mine Design on New Zealand’s West Coast (Pike River Coal Limited ...
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Study on Distribution Law of Stress and Permeability around Hydraulic ...
2022.6.7 By constructing the permeability model to distinguish the fracture zone, plastic zone, and elastic zone around the hydraulic fracturing borehole, we study the influence of some important parameters on the stress distribution around the borehole and the permeability of the coal rock. The research results show that the greater the ground stress, the greater the radial
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