Selecting Pumps for Mining Applications | Pumps & Systems
This is one type of conveyance dust suppression system that is used during the coal mining process to control respirable coal and rock dust. (Images courtesy of Motion Industries) ... The benefits can include hydraulic smoothness and hydrophobicity that allow for high-energy efficiency and optimal pump performance. Testing the …
In-Situ Leaching & Borehole Mining
The term borehole mining is used for the process where a hydraulic jet is used to slurrify a mineral commodity which is then pumped to the surface through a pipe. In situ mining has been characterized as an extraction method having significant potential for increasing productivity and extending reserves. Leaching and borehole mining can …
Selecting the Optimal Borehole Drilling Pattern for Methane …
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 …
In-situ experimental study on hydro-borehole …
The hydro-mining technology is considered as a promising method of bituminous coal excavation. The paper presents the results of the in-situ experimental …
Study on Distribution Law of Stress and Permeability around Hydraulic
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 …
Hydraulic mining | Environmental Impact, Debris Removal, …
hydraulic mining, use of a powerful jet of water to dislodge minerals present in unconsolidated material, including mine tailings, placer deposits, alluvium, laterites (soil rich in iron oxides), and saprolites (soil rich in clay). It has also been applied to consolidated materials from sandstones through coal to hard rock. Hydraulic mining encompasses …
(PDF) Analysis on the multi-phase flow characterization in …
Hydraulic slotting in a gas drainage borehole is an effective method of enhancing gas drainage performance. However, it frequently occurs that a large amount of slotting products (mainly the coal ...
Sensors | Free Full-Text | A Combined Method of Seismic
In order to mitigate the risk of roof-dominated coal burst in underground coal mining, horizontal long borehole staged hydraulic fracturing technology has been prevailingly employed to facilitate the weakening treatment of the hard roof in advance. Such weakening effect, however, can hardly be evaluated, which leads to a lack of a …
Research on One Borehole Hydraulic Coal Mining System
Research on One Borehole Hydraulic Coal Mining System @article{Xia2008ResearchOO, title={Research on One Borehole Hydraulic Coal Mining System}, author={Bairu Xia and Xiping Zeng and Zhixin Mao}, journal={Earth Science Frontiers}, year={2008}, volume={15}, pages={222-226} } B. Xia, Xiping Zeng, Zhixin …
one kind of borehole hydraulic coal mining system
One kind of borehole hydraulic coal mining system… GEC-01 General contributions to coal geoscience . One kind of borehole hydraulic coal mining system. » Free Online Chat. Hydraulic mining – Wikipedia, the free encyclopedia. Hydraulic mining, or hydraulicking, is … complex levee system to protect the city from floods and sediment.
Optimization and application of sealing material and …
Hydraulic fracturing borehole sealing plays a key role in hydraulic fractur-ing technology, thus the high quality of borehole sealing is the prerequisite and guarantee for the success of hydraulic fracturing borehole sealing. Underground coal mines hydraulic fracturing borehole sealing quality is primarily determined by following two key factors.
Hydraulic Mining
Hydraulic mining is also likely to find good application with our friable and moderately soft coals. The advantages of hydraulic mining are – winning of coal is not hindered by bringing of face support, the system is not very sophisticated to warrant complexity of adoption, higher output per working face results with steeply inclined seams.
Field investigation of multi-stage pulse hydraulic
Directional long borehole has been promoted in underground coal mines. However, the hydraulic fracturing technology based on directional long borehole in underground coal mines is still in the initial stage. The uneven fracture distribution and small number of fractures in the conventional hydraulic fracturing with constant injecting …
Borehole hydraulic coal mining system analysis
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 …
2023/sbm research on one borehole hydraulic coal mining system…
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Experimental research on the performances of water jet …
It follows the same basic principles as the high-pressure jet grouting and hydraulic coal mining, they all use high-pressure jet to break the ore bed or the rock and soil mass [14–17]. Moreover, borehole hydraulic mining technology has many advantages. The most significant advantage is that the method does not need to remove …
Reliability Assessment of the Hydraulic Fracturing Process in Coal …
In a reliability assessment of hydraulic fracturing, the efficacy of hydraulic fracturing must be evaluated, and the source properties and magnitude of micro-earthquakes induced by hydraulic fracturing in a coal mine need to be quantified. Firstly, the changing trends of the number and energy of micro-seismic events induced by …
(PDF) Optimizing the Structure of the Straight Cone
In borehole hydraulic mining, hydraulic coal mini ng 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
Hydraulic borehole mining system (Patent) | OSTI.GOV
Abstract. A hydraulic underground mining system is disclosed for operating through a small diameter borehole into a subterranean body. An elongated mining tool includes a liquid jet nozzle that is movable in vertical direction along the length of the mining tool for forming a directed jet stream to impact material in the ore body and convert the material …
Variation in the Pore Structure of Coal after Hydraulic …
The mass of coal discharged from a cross‐borehole was 1.15 t/m and the average methane concentration of single drainage borehole increased by 1.09‐4.1 times, and the average methane extraction ...
Application of a hydraulic borehole mining apparatus to …
Abstract. Extensive factory and field testing of the hydraulic borehole coal mining tool was performed. The tests: (1) characterized cutting nozzle and crusher wear and reliability; (2) characterized cutting, cavity slurry flow, crushing, and slurry pumping processes under field conditions; and (3) compared laboratory cutting and pumping rates with those …
Cross-borehole hydraulic slotting technique for preventing …
The main mechanism of this technology is to expand the borehole diameter through hydraulic flushing measures, increase the strain of the coal around the borehole, and increase the development of ...
Variation in the Pore Structure of Coal after Hydraulic …
The borehole hydraulic coal mining system was demonstrated to be a feasible method for hydraulic mining (Xia et al. 2008). The method involves fragmenting coal seams by high-pressure water jet and removing coal slump through a drilled hole by hydraulic or airlifting methods. More recently, a novel hydraulic method for underground mining of a ...
Optimization and application of sealing material and
However, in China, the coal seam generally possess some characteristics, such as low pressure, low permeability, low saturation, and so forth, which means the borehole hydraulic fracturing must be ...
one kind of borehole hydraulic coal mining system
A new cross‐borehole hydraulic caving technique in the … · Coal mine methane (CMM) is a kind of coal-associated en-ergy that can be used directly. 1 The gas storage has reached 36.81 trillion cubic meters with the depth of . 2000 m in China.2 In normal conditions, gas extraction is required be-fore mining methane-bearing coal seams to eliminate coal and …
Research on One Borehole Hydraulic Coal Mining …
Research on One Borehole Hydraulic Coal Mining System @article{Xia2008ResearchOO, title={Research on One Borehole Hydraulic Coal …
Research on One Borehole Hydraulic Coal Mining …
Abstract. The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high …
Physical and mechanical parameters of borehole hydraulic mining …
Among these four mining methods, borehole hydraulic mining technology is the especially suitable for mining deep and low-grade underground oil shale deposits [9][10][11][12][13][14] [15]. It ...
Analysis on the multi-phase flow characterization in cross …
During the hydraulic slotting, the slotting products (mainly the coal slurry and gas) are continuously discharged through the annular space between the drill pipe and borehole wall as shown in Fig. 3.In this inclined deslagging channel, the deslagging power mainly includes the gravity of slotting products, the continuously increasing expansion …
Hydro- Borehole Mining development | Request PDF
Abstract. Hydraulic Borehole Mining coal excavation by borehole, cutt by high prtssure water jets, downhole crushing and lift as a slurry up to surface. Technology and technical concept and ...
