2008年7月1日· The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using highpressure water jet Then the mixture of coal and water as slurry are driven out of the2008年7月1日· The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using highResearch 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 highpressure water jet2015年9月1日· To solve the potential gas disaster problems while excavating a coal roadway in highgas lowpermeability single coal seams, we have proposed a crossCrossborehole hydraulic slotting technique for preventing and
Semantic Scholar extracted view of "Research on One Borehole Hydraulic Coal Mining System" by B Xia et al DOI: 101016/S18725791(08)600573 Corpus ID: 20年1月16日· Coal mine methane (CMM) is a kind of coal‐associated energy that can be used directly 1 The gas storage has reached 3681 trillion cubic meters with the depth ofA new cross‐borehole hydraulic caving technique in the coal
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 high1977年4月21日· The borehole hydraulic coal mining system accesses the coal seam through a hole drilled in the overburden The mining device is lowered through the holeBorehole hydraulic coal mining system analysis NASA
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 1120|2008年7月1日· Abstract The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using highResearch on One Borehole Hydraulic Coal Mining System
Publication Date 1978 Personal Author Boyce, T A Page Count 56 Abstract As part of a coal mining R and D review task being undertaken by the Engineering Societies Commission on Energy, Inc, for the Department of Energy2023年12月7日· Therefore, coal rock stress plays an important role in support design, coal mining and prevention of coal rock dynamic disasters such as rock burst Accurate acquisition of stress parameters of coal rock mass within the mining range is critical for the prevention and control of coal rock dynamic disasters and the safety of coal mineDevelopment of a Threedimensional Stress Monitoring
2021年10月12日· 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 openpit mining and underground mining It is2018年7月1日· According to the difference in continuous phase, there are mainly two deslagging flow patterns during hydraulic slotting: the coal slurry as the continuous phase and the gas as the continuous phase Fig 4 shows the deslagging flow patterns while the drill pipe is stationary inside the boreholeAnalysis on the multiphase flow characterization in cross
2023年10月11日· 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 rateOne kind of borehole hydraulic coal mining system GEC01 General contributions to coal geoscience One kind of borehole hydraulic coal mining system Bairu Xia, China University of Geosciences (China) » Free Online Chatone kind of borehole hydraulic coal mining system
2021年2月1日· Accurate evaluation of the impact range of hydraulic fracturing (HF) in coal seams is the key to optimizing HF design schemes In this study, multistage HF processes in Well No 1 of the Xinji NoSemantic Scholar extracted view of "Research on One Borehole Hydraulic Coal Mining System" by B Xia et al DOI: 101016/S18725791(08)600573 Corpus ID: Research on One Borehole Hydraulic Coal Mining SystemResearch on One Borehole Hydraulic Coal Mining System
2023年12月21日· Borehole hydraulic fracturing in coal mines can effectively prevent coal rock dynamic disasters Accurately recognizing weak microseismic events is an essential prerequisite for the microseismic monitoring of hydraulic fracturing in coal seams This study proposes a recognition method for weak microseismic waveforms based on[14][15][16][17] In regards to the hydraulic mining, a feasible method named borehole hydraulic coal mining system was developed, which involves fragmenting coal seams by highpressure waterjetResearch 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 highpressure water jet Then the mixture of coal and water as slurry are driven out of the borehole by hydraulic or airlifting method, and are separated at the surface This paper presents a case study of2018年6月20日· Among these four mining methods, borehole hydraulic mining technology is the especially suitable for mining deep and lowgrade underground oil shale deposits [9–15] It follows the same basic principles as the highpressure jet grouting and hydraulic coal mining, they all use highpressure jet to break the ore bed or the rockExperimental research on the performances of water jet
1 INTRODUCTION Coal mine methane (CMM) is a kind of coal‐associated energy that can be used directly 1 The gas storage has reached 3681 trillion cubic meters with the depth of 2000 m in China 2 In normal conditions, gasDOI: 101016/JJNGSE201506035 Corpus ID: Crossborehole hydraulic slotting technique for preventing and controlling coal and gas outbursts during coal roadway excavation @articleCrossborehole hydraulic slotting technique for preventing and
2020年11月17日· 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 coalThe Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using highpressTop Search Home > Section 24 > Chapter 23,514 Research onResearch on One Borehole Hydraulic Coal Mining System
2020年11月13日· With increasing demands for coal resources, coal has been gradually mined in deep coal seams Due to high gas content, pressure and in situ stress, deep coal seams show great risks of coal and gas outburst Protective coal seam mining, as a safe and effective method for gas control, has been widely used in major coalproducing01072008· Research on One Borehole Hydraulic Coal Mining System XIA Bairu, ZENG Xiping, MAO Zhixin School of Engineering and Technology, China University of Geosciences (Beijing), Beijing , China Abstract: Theresearch on one borehole hydraulic coal mining system
2018年10月1日· 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 the1983年8月30日· 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, crushingHydraulic borehole mining system (Patent) | OSTIGOV
Safety in coal mining is greatly increased by the drainage of the methane content of coal seams through boreholes, simultaneously producing significant energy The design of suitable drainage technology is based on the mathematical modeling of methane flow in coal seams In the calculation of the methane pressure, the new mathematical model2018年5月2日· Background Hydraulic fracturing involves producing and extending fractures in rock by injecting a fluid under pressure into a section of a borehole The fluid pressure produces tensile stress in the rock at the borehole wall, causing a fracture to start The fluid then enters theHydraulic fracturing in mining – CSIROpedia
2013年1月1日· The hydraulic fracturing of production seams is a conventional way to improve efficiency of borehole mining In underground mineral mining this process is applied to provide greater coverage of aThe 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 highpressure water jet andVariation in the Pore Structure of Coal after Hydraulic Slotting
2023年1月21日· In Australia socalled “hydraulic mining” was used in open pit mining 16 with hydromonitors of mining effectiveness at the level of 500 Mg/h and water pressure from 10 to max 40 MPa2015年9月1日· 1 Introduction In recent years, Chinese coal mines begun to apply hydraulic fracturing technology for the pressure relief and permeability increase of difficultly extracted coal seams Laboratory investigations, 1, 2, 3 numerical simulations 4, 5, 6 and field measurements 7, 8, 9 have proven that hydraulic fracturing can effectively relieveEvaluation of coal seam hydraulic fracturing using the direct
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 Hydraulic Borehole Mining techniques and equipment with applied modern engineeringThe Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using highpressure water jet Then the mixture of coal and water as slurry are driven out of the borehole by hydraulic or airlifting method, and are separated at the surface This paper presents a case study ofResearch on One Borehole Hydraulic Coal Mining System
2015年9月1日· Prepumping of coal seam gas by gas extraction borehole is an effective measure to manage gas The existing study concluded that the pressure relief zone of the roadway is difficult to seal, and2018年5月1日· Analysis on the multiphase flow characterization in crossmeasure borehole during coal hydraulic slotting May 2018 International Journal of Mining Science and Technology 28(4) DOI:101016/jijmst(PDF) Analysis on the multiphase flow characterization in
1978年12月1日· The US Department of Energy's Office of Scientific and Technical Information @article{osti, title = {Review of the borehole hydraulic coal mining system Final report on task oil}, author = {Boyce, T A}, abstractNote = {As part of a coal mining R and D review task being undertaken by the Engineering Societies CommissionThe 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 highpressure water jet and removing coal slump throughVariation in the Pore Structure of Coal after Hydraulic Slotting
2015年9月1日· The mining industry was one of the early users of this technology Yao (1991) conducted a study to explore the potential use of water jet as an efficient and economical cutting tool in rock and coal excavation Li et al (2000)2012年1月1日· Among these four mining methods, borehole hydraulic mining technology is the especially suitable for mining deep and lowgrade underground oil shale deposits [9][10][11][12][13][14] [15] ItPhysical and mechanical parameters of borehole hydraulic
2018年10月1日· Anisotropy of coal In order to analyze the effect of coal anisotropy on the evolution of gas flow field around borehole, the other parameters are set as constants: D0 = 3 × 10 −11 m 2 /s, λ = 2 × 10 −7, pm0 = 2 MPa, kfx0 = 6 × 10 −17 m 2 and kfy0 = 2 × 10 −17 m 2 The initial permeability k0 is determined to be 6 × 10 −17 m 2Xia et al and Wiley [9, 10] studied the mechanisms that the borehole hydraulic coal mining system (BHCMS) causes fragmentation of coal seams using a @article{Xia2008ResearchOO, title={Research on One Borehole Hydraulicresearch on one borehole hydraulic coal mining system
2021年2月26日· In a reliability assessment of hydraulic fracturing, the efficacy of hydraulic fracturing must be evaluated, and the source properties and magnitude of microearthquakes induced by hydraulic fracturing in a coal mine need to be quantified Firstly, the changing trends of the number and energy of microseismic events induced by2017年12月1日· Optimizing the Structure of the Straight Cone Nozzle and the Parameters of Borehole Hydraulic Mining for Huadian Oil Shale Based on Experimental Research December 2017 Energies 10(12):2021 DOI:10(PDF) Optimizing the Structure of the Straight Cone Nozzle
2022年7月1日· borehole, launching a multifunctional mining device in the borehole (HBM tool), the deposit hydrocutting and hydrocrushing of the cut material as well as hydrolifting of the excavated material to the surface via a modified “airlift” system2023年10月13日· Accurate evaluation of the impact range of hydraulic fracturing (HF) in coal seams is the key to optimizing HF design schemes In this study, multistage HF processes in Well No 1 of the Xinji No 2 coal mine were monitored and analyzed using ground microseismic (MS) monitoring technology An improved particle swarmEvaluation of Hydraulic Fracturing in Coal Seam using