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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

get price

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

get price

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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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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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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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  Hydraulic fracturing (HF) technology is one of the core technologies for the development of unconventional oil and gas resources, which has been widely used in the stimulation of petroleum reservoirs (Economides and Martin 2007; Tang et al. 2011).In recent years, this technology has been applied to coal rock dynamic disaster prevention and control,

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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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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

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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

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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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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

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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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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

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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

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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 research results and field temperature measurement

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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

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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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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

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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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The Application of Water Jets in Coal Mining

2020-11-4  the coal market. In more than one mine where hydraulic mining sections were es­ tablished, although the hydraulic section remained profitable, the mine as a whole did not (15). The volume of coal mining research fell away, and hydraulic mining practice passed from the American scene. In Russia, however, the methods were be­ ing refined and

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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 roadways and

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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

get price

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 research results and field temperature measurement

get price

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