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research on one borehole hydraulic coal mining system

research on one 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 method, and are separated at the surface. This paper presents a case study of ...

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Research on One Borehole Hydraulic Coal Mining System ...

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 method, and are separated at the surface. This paper presents a case study of ...

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Research on One Borehole Hydraulic Coal Mining System ...

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

Read More
Research on One Borehole Hydraulic Coal Mining System ...

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 method, and are separated at the surface. This paper presents a case study of hydraulic borehole coal mining.

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Hydraulic borehole mining (Conference) OSTI.GOV

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. The fragmented coal is pumped to the surface as a slurry by a jet pump located in the center of the mining device.

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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 microseismic (MS) monitoring technology to monitor and characterize the spatial shape of cracks caused by borehole HF in coal seam in an underground coal mine. And we also tested and

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hydraulic system of coal mining machinery

Research On One Borehole Hydraulic Coal Mining System. Research On One Borehole Hydraulic Coal Mining System Prompt Caesar is a famous mining equipment manufacturer well-known both at home and abroad major in producing stone crushing equipment mineral separation equipment limestone grinding equipment...

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Experimental research on the performances of water jet ...

2018-6-20  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 the overlying strata.

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Hydraulic Mining Methods - 911 Metallurgist

2018-10-3  Hydraulic Borehole Mining. From 1975 to 1982 the U.S. Bureau of Mines and the Department of Energy funded a program to develop a manless

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Research on the structures and hydraulic performances of ...

2019-11-19  Wen JW, Chen C, Campos U (2018) Experimental research on the performances of water jet devices and proposing the parameters of borehole hydraulic mining for oil shale. PLoS ONE 13(6):1–32. Article Google Scholar 21. Wen JW (2014) Numerical simulation and experimental research on the jet devices for borehole hydraulic mining of oil shale ...

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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 microseismic (MS) monitoring technology to monitor and characterize the spatial shape of cracks caused by borehole HF in coal seam in an underground coal mine. And we also tested and analyzed the stress and moisture ...

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hydraulic system of coal mining machinery

Research On One Borehole Hydraulic Coal Mining System. Research On One Borehole Hydraulic Coal Mining System Prompt Caesar is a famous mining equipment manufacturer well-known both at home and abroad major in producing stone crushing equipment mineral

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A new cross‐borehole hydraulic caving technique in the ...

borehole and the permeability of the coal around the borehole are. Hydraulic slotting can enhance permeability by cutting coal seam fractures with high-pressure water jet. Therefore, hydraulic flushing and hydraulic slotting are often used to enhance permeability in coal mines. A lot of research on hydraulic slotting have been done in

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In-Situ Leaching Borehole Mining

2019-1-14  Borehole Mining. Although the Bureau had not been engaged in hydraulic borehole mining research prior to FY 1974, it had been actively engaged in research to utilize hydraulic jet cutting technology for safer, more efficient mining of coal and other

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Research on Application of Hydraulic Fracturing Enhanced ...

2019-10-25  Coal and gas outburst accident is one of the critical disasters restricting the safety production of coal enterprises in China. To solve the problems of low permeability and difficulty in gas extraction, a hydraulic fracturing test was carried out according to the occurrence characteristics of coal and rock gas in Pingdingshan Coal Mine No. 12; and the change law of the gas concentration and ...

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University of Wollongong Research Online

2020-10-13  Hydraulic mining . Hydraulic mining has been in existence for many years. One of the most notable examples of its use was Mitsui Sunagawa mine in Hokkaido, Japan in an approximately 6 m thick weak (3 MPa uniaxial compressive strength) seam at a dip of approximately 70. o. There the coal was sluiced by the use of a

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Hydraulic Mining Methods - 911 Metallurgist

2018-10-3  Hydraulic Borehole Mining. From 1975 to 1982 the U.S. Bureau of Mines and the Department of Energy funded a program to develop a manless mining technique that accessed the coal seam through a 400 mm borehole driven from the surface. A high

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Study on Borehole Arrangement Methods for Gas

2020-10-28  Research Article Study on Borehole Arrangement Methods for Gas Extraction by Hydraulic Slotting in Long-Distance Through-Coal Seam Tunnel Cunfang Zhu1 and Shuang Cai 2 1Qinghai Local Railway Construction Investment Co. Ltd., Xining 810001, China 2China Merchants Chongqing Communication Research Design Institute Co., Ltd., Chongqing 400067, China ...

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US20130106166A1 - Horizontal Borehole Mining System

A method and system are provided for horizontal borehole mining a seam of material, in which a substantially horizontal borehole is provided through a seam of material, a retractable casing is disposed within the seam, and a high pressure drilling tool is disposed within said casing for excavation of the seam material to form an excavation cavity, the high pressure drilling tool having a high ...

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Research on the Distribution Law and Influencing Factors ...

Taking the Xutuan coal mine as an example, based on the temperature measurement data, combined with the geological background of the study area, this paper analyzes the distribution, thermal evolution, formation mechanism and influencing factors of the deep geothermal field in the study area. Combined with previous re and field temperature measurement data, the re ...

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Hydraulic Stimulation of a Surface Borehole for Gob ...

2012-8-30  Hydraulic Stimulation of a Surface Borehole for Gob Degasif ication ... during coal mining may vary substantially from one mine to another. In some very gassy mines, a single section may produce several million cubic feet per ... All authors are with the Pittsburgh Mining and Safety Research Center, Pitts- burgh, Pa.

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A new cross‐borehole hydraulic caving technique in the ...

borehole and the permeability of the coal around the borehole are. Hydraulic slotting can enhance permeability by cutting coal seam fractures with high-pressure water jet. Therefore, hydraulic flushing and hydraulic slotting are often used to enhance permeability in coal mines. A lot of research on hydraulic slotting have been done in

Read More
Study on Borehole Arrangement Methods for Gas

2020-10-28  Research Article Study on Borehole Arrangement Methods for Gas Extraction by Hydraulic Slotting in Long-Distance Through-Coal Seam Tunnel Cunfang Zhu1 and Shuang Cai 2 1Qinghai Local Railway Construction Investment Co. Ltd., Xining 810001, China 2China Merchants Chongqing Communication Research Design Institute Co., Ltd., Chongqing 400067, China ...

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University of Wollongong Research Online

2020-10-13  Hydraulic mining . Hydraulic mining has been in existence for many years. One of the most notable examples of its use was Mitsui Sunagawa mine in Hokkaido, Japan in an approximately 6 m thick weak (3 MPa uniaxial compressive strength) seam at a dip of approximately 70. o. There the coal was sluiced by the use of a

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US Patent Application for HYDRAULIC BOREHOLE MINING

2014-10-13  A hydraulic borehole mining system controlled and operated above-ground includes a high-pressure cutting nozzle that is delivered to an underground resource body through a relatively small diameter borehole. A series of water and air fluid streams at various pressures are delivered to the resource body, and the target resource is disaggregated and/or fluidized and conveyed back to

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Energy Exploration Exploitation Directional hydraulic ...

2019-1-20  20mm, 30mm, and 40mm on one side of the hole. The special fracturing seamless steel pipe was sealed with epoxy resin in the uncut section of the orifice. Figure 2. Location of the Ningtiaota coal mine and its geological occurrence of C1 coal seam. Figure 3. Schematic diagram of the longitudinal guide seams in the cube specimen.

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University of Wollongong Research Online

2020-10-13  Research Online Coal Operators' Conference Faculty of Engineering and Information ... Resin anchored roof bolts are the basis for the primary roof support system of every underground coal mine in Australia. ... Bolts were installed according to manufacturer’s recommendations on a specially devised hydraulic bolting rig, albeit one that may ...

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Research support measures in mine roadways prone to ...

2021-5-6  directional hydraulic fracturing [12,13], coal seam blasting pressure relief [14–16], coal seam large-diameter borehole pressure relief, coal seam high-pressure water injection [17], floor blasting and floor cutting. Kang and co-workers [18,19] found that coal and rock masses form the main bodies of

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US20130106166A1 - Horizontal Borehole Mining System

A method and system are provided for horizontal borehole mining a seam of material, in which a substantially horizontal borehole is provided through a seam of material, a retractable casing is disposed within the seam, and a high pressure drilling tool is disposed within said casing for excavation of the seam material to form an excavation cavity, the high pressure drilling tool having a high ...

Read More
Research on the Distribution Law and Influencing Factors ...

Taking the Xutuan coal mine as an example, based on the temperature measurement data, combined with the geological background of the study area, this paper analyzes the distribution, thermal evolution, formation mechanism and influencing factors of the deep geothermal field in the study area. Combined with previous re and field temperature measurement data, the re ...

Read More