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Research on One Borehole Hydraulic Coal Mining

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

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Evaluation of Borehole Hydraulic Fracturing in Coal

2020-11-17  The borehole HF stimulation can create hydraulic cracks and transform the coal structure by fluids injection into the coal seam. Because the influence range of HF is larger, and the effects of stress relief and permeability enhancement on coal and rock layers is significant, HF has become an important technology and routine process for dynamic disaster control and CBM production in coal mines.

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Hydraulic borehole mining for pitching coal seams.

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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Research on One Borehole Hydraulic Coal Mining

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.

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Review of the borehole hydraulic coal mining system.

OSTI.GOV Technical Report: Review of the borehole hydraulic coal mining system. Final report on task oil Final report on task oil Title: Review of the borehole hydraulic coal mining system.

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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 injected into a pipeline for transport to ...

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A new cross‐borehole hydraulic caving technique in

A new cross‐borehole hydraulic caving technique in the coal seam with a soft layer for preventing coal and gas outbursts during coal roadway excavation. Binbin Qin. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, China.

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Gas flow field evolution around hydraulic slotted

2018-10-1  The results showed that hydraulic slotted borehole gas drainage enhanced the permeability of coal and improved the recovery rate of CBM. Liu et al. (2016a) proposed a two-walled jet model to simulate and analyze the influence radius of hydraulic slotting and established a slotting radius prediction model and verified the model through experiments.

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Response characteristics of coal subjected to hydraulic ...

2017-2-1  In this paper, a triaxial experimental system was developed to simulate hydraulic fracturing using raw coal and briquette coal samples, respectively. The borehole wall strain observed during hydraulic fracturing was plotted (borehole wall strain curves) and the

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Home - Kinley Exploration - Hydraulic Borehole Mining

Hydraulic Borehole Mining Kinley Exploration is a world leader in Hydraulic Borehole Mining strategy, equipment design, engineering and operations. With over 30 years in applied engineered drilling solutions, the Kinley team has pioneered the new age of

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hydraulic borehole machine, hydraulic borehole

Hydraulic Rock Electric Coal Tunnel Borehole Drilling Machine for Coal Mine. Up to 5 years warranty. US $3000-$5000 / Set. 1.0 Sets (Min. Order) CN Hebei Gimarpol Machinery Technology Co., Ltd. 4 YRS. 90.9%. 5.0 (11) Contact Supplier. Q5: Do you agree sample order 9 A: Yes ,we are welcome your sample order to testing our quality. Q6: Can we ...

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Research on One Borehole Hydraulic Coal Mining

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.

Get Price

Article: Impact of hydraulic fracturing and borehole ...

2018-10-24  Title: Impact of hydraulic fracturing and borehole spacing on gas drainage along a coal seam Authors: Huayong Lv. Addresses: School of Energy and Mining, China University of Mining and Technology, Beijing, Beijing 100083, China; Coal Industry Engineering Research, Center of Top-coal Caving Mining, Beijing 100083, China. Abstract: Hydraulic fracturing is a technology employed to improve coal ...

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Study of the borehole hydraulic fracturing and the ...

2017-1-22  hydraulic fracturing, the law of gas seepage in cracks is the most important factor to affect the extraction. For the reason that, it has both scientific and practical sense to study the borehole hydraulic fracturing and the principle of gas seepage in coal seam [13-17]. 2. Numerical analysis of the coal seam hydraulic fracturing

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A Novel Method for Borehole Blockage Removal and ...

2016-8-31  A Novel Method for Borehole Blockage Removal and Experimental Study on a Hydraulic Self-Propelled Nozzle in Underground Coal Mines Zhaolong Ge 1,2,*, Kai Deng 1,2, Yiyu Lu 1,2, Liang Cheng 1,2, Shaojie Zuo 1,2 and Xingdi Tian 3 1 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University,

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Hydraulic Stimulation of a Surface Borehole for Gob ...

2012-8-30  HYDRAULIC STIMULATION OF A SlJRFACE BOREHOLE FOR GOB DEGASlFlCATlON by S8 D8 Maksimovic,' C8 ti8 Elder,2 and Fred Na Kissel13 ABSTRACT The Bureau of Mines evaluated the hydraulic stimulation of a gob- degasification borehole to determine if

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Borehole Microseismic Imaging of Hydraulic Fracturing: A ...

2020-4-26  hydraulic-fracturing treatments were operated at a coal-bed methane (CBM) field in Indonesia to stimulate the flow and increase the reservoir’s permeability while the monitoring system was set in a single near-vertical borehole. Locating event sources accurately is fundamental to investigating the induced fractures, but the

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Hydraulic Fracturing in Underground Coal Mines

2019-1-18  challenges of the test site remained inconclusive because of the location of trial site in the coal seam deposit. Keywords: Hydraulic fracturing, mine gas drainage, borehole casing, cementing and slotting. 1. INTRODUCTION . Hydraulic fracturing (HF) is a method of stimulating gas production through the injection of fluid under pressure into the

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Borehole Mining - Kinley Exploration : Kinley Exploration

Borehole Mining No longer a science project, borehole mining is proving itself as a workable technology that can be applied to a number of industries. Hydraulically jet-cutting a cavern of rock 20 feet in diameter from a drilled bore hole allows this system to recover resources previously uneconomical for open pit or underground mining operations.

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Optimizing the Structure of the Straight Cone Nozzle and ...

2019-7-17  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 mass [13 15]. Borehole hydraulic mining technology is used for the in-situ mining of underground

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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 injected into a pipeline for transport to ...

Get Price

hydraulic borehole machine, hydraulic borehole

Hydraulic Rock Electric Coal Tunnel Borehole Drilling Machine for Coal Mine. Up to 5 years warranty. US $3000-$5000 / Set. 1.0 Sets (Min. Order) CN Hebei Gimarpol Machinery Technology Co., Ltd. 4 YRS. 90.9%. 5.0 (11) Contact Supplier. Q5: Do you agree sample order 9 A: Yes ,we are welcome your sample order to testing our quality. Q6: Can we ...

Get Price

Research on One Borehole Hydraulic Coal Mining

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.

Get Price

China Directional long borehole hydraulic fracturing ...

During fracturing of 1# drilling, there are many obvious pressure drops, which are consistent with the typical pressure curve model of drilling and hydraulic fracturing in the roof of soft coal seam. After hydraulic fracturing, within 86 days of drilling and extraction, the extraction concentration is 27% ~ 51%, and the average is 42.11%.

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Variation in the Pore Structure of Coal after Hydraulic ...

2018-3-1  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 ...

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hydraulic borehole drilling machine, hydraulic

8,753 hydraulic borehole drilling machine products are offered for sale by suppliers on Alibaba, of which mine drilling rig accounts for 70%, drilling machines accounts for 1%, and power drills accounts for 1%. A wide variety of hydraulic borehole drilling machine options are

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A Method of Quick and Safe Coal Uncovering by

In order to quickly and safely uncover the outburst coal seam at the air intake shaft in panel 2, Zhaozhuang Coal Mine has come up with the technology of multibranch radial borehole hydraulic fracturing (MRBHF) coal uncovering technology in the surface coalbed methane (CBM) well.

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Borehole Microseismic Imaging of Hydraulic Fracturing: A ...

2020-4-26  hydraulic-fracturing treatments were operated at a coal-bed methane (CBM) field in Indonesia to stimulate the flow and increase the reservoir’s permeability while the monitoring system was set in a single near-vertical borehole. Locating event sources accurately is fundamental to investigating the induced fractures, but the

Get Price

Borehole Mining - Kinley Exploration : Kinley Exploration

Borehole Mining No longer a science project, borehole mining is proving itself as a workable technology that can be applied to a number of industries. Hydraulically jet-cutting a cavern of rock 20 feet in diameter from a drilled bore hole allows this system to recover resources previously uneconomical for open pit or underground mining operations.

Get Price

Hydraulic Stimulation of a Surface Borehole for Gob ...

2012-8-30  HYDRAULIC STIMULATION OF A SlJRFACE BOREHOLE FOR GOB DEGASlFlCATlON by S8 D8 Maksimovic,' C8 ti8 Elder,2 and Fred Na Kissel13 ABSTRACT The Bureau of Mines evaluated the hydraulic stimulation of a gob- degasification borehole to determine if

Get Price

Research On One Borehole Hydraulic Coal Mining

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, etc.

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Article: Impact of hydraulic fracturing and borehole ...

2018-10-24  Title: Impact of hydraulic fracturing and borehole spacing on gas drainage along a coal seam Authors: Huayong Lv. Addresses: School of Energy and Mining, China University of Mining and Technology, Beijing, Beijing 100083, China; Coal Industry Engineering Research, Center of Top-coal Caving Mining, Beijing 100083, China. Abstract: Hydraulic fracturing is a technology employed to improve coal ...

Get Price

China Directional long borehole hydraulic fracturing ...

During fracturing of 1# drilling, there are many obvious pressure drops, which are consistent with the typical pressure curve model of drilling and hydraulic fracturing in the roof of soft coal seam. After hydraulic fracturing, within 86 days of drilling and extraction, the extraction concentration is 27% ~ 51%, and the average is 42.11%.

Get Price

Hydraulic Fracturing in Underground Coal Mines

2015-12-2  challenges of the test site remained inconclusive because of the location of trial site in the coal seam deposit. Keywords: Hydraulic fracturing, mine gas drainage, borehole casing, cementing and slotting. 1. INTRODUCTION . Hydraulic fracturing (HF) is a method of stimulating gas production through the injection of fluid under pressure into the

Get Price

Borehole Mining - Kinley Exploration : Kinley Exploration

Borehole Mining No longer a science project, borehole mining is proving itself as a workable technology that can be applied to a number of industries. Hydraulically jet-cutting a cavern of rock 20 feet in diameter from a drilled bore hole allows this system to recover resources previously uneconomical for open pit or underground mining operations.

Get Price

Hydraulic Stimulation of a Surface Borehole for Gob ...

2012-8-30  HYDRAULIC STIMULATION OF A SlJRFACE BOREHOLE FOR GOB DEGASlFlCATlON by S8 D8 Maksimovic,' C8 ti8 Elder,2 and Fred Na Kissel13 ABSTRACT The Bureau of Mines evaluated the hydraulic stimulation of a gob- degasification borehole to determine if

Get Price

Borehole Microseismic Imaging of Hydraulic Fracturing: A ...

2020-4-26  hydraulic-fracturing treatments were operated at a coal-bed methane (CBM) field in Indonesia to stimulate the flow and increase the reservoir’s permeability while the monitoring system was set in a single near-vertical borehole. Locating event sources accurately is fundamental to investigating the induced fractures, but the

Get Price

Gas flow field evolution around hydraulic slotted

Abstract Currently, hydraulic slotted borehole technology for strengthening gas drainage is one of the main measures to control gas disasters in deep mines. In this paper, to analyze the evolution of gas flow field around the hydraulic slotted borehole, the borehole gas drainage was simulated based on the anisotropy of coal structure and the established multi-field (namely, coal deformation ...

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Mining-Induced Stress Measurement With Hydraulic

This paper proposes an unconventional, simple, and practical method of measuring mining-induced ground stresses with hydraulic borehole pressure cells. The method is a direct ground stress measuring technique. ... The technique may be applied to monitoring a stress buildup that may lead to mine roof failure or to rock and coal outbursts.

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TECHNOLOGY OF COUPLED PERMEABILITY

8 K. Wang, B. Li, J. P. Wei, P. Li, Change regulation of coal seam permeability around hydraulic flushing borehole, J. Mining Safety Eng., 30 (2013) 5, 778–784 9 F. Cai, Z. Liu, B. Lin et al., Numerical simulation and experiment analysis of improving permeability by deep-hole pre-splitting explosion in highly gassy and low permeability coal ...

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