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Research on One Borehole Hydraulic Coal Mining System
Semantic Scholar extracted view of "Research on One Borehole Hydraulic Coal Mining System" by B. Xia et al.
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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
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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
Bavarder sur InternetIn-situ experimental study on hydro-borehole technology
2023.1.21 1 Altmetric Metrics Abstract The hydro-mining technology is considered as a promising method of bituminous coal excavation. The paper presents the results of the
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Cross-borehole hydraulic slotting technique for preventing
2015.9.1 To solve the potential gas disaster problems while excavating a coal roadway in high-gas low-permeability single coal seams, we have proposed a cross
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Research on Directional Hydraulic Coal Cutting and Outburst
2023.7.26 Directional hydraulic coal mining technology mainly utilizes the combination of kilometer-oriented technology and hydraulic coal mining technology to
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Energies Free Full-Text Optimizing the Structure
2021.10.12 In borehole hydraulic mining, hydraulic coal mining 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 [
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Review of the Borehole Hydraulic Coal Mining System. Final
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
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Bingxiang HUANG Professor PhD China University of Mining
Bingxiang HUANG, Professor Cited by 1,691 of China University of Mining and Technology, Xuzhou Read 85 publications Contact Bingxiang HUANG
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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
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Continuous three-dimensional stress monitoring in roof of coal
2022.9.1 As the cornerstone of China's current energy, coal resources maintain the leading position of energy. With the continuous increase in mining depth and mining intensity of coal resources, the stress level of stopes keeps getting higher, so the rockburst disaster in coal mines is aggravating daily (Shi et al. 2020; Dai et al. 2021; Li et al. 2021), and has
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Varying characteristics of electromagnetic radiation from coal
2020.7.11 Coal and gas outbursts are among the most serious mine disasters in China. When an outburst occurs, huge amounts of coal and gas are ejected from the working face in an instant, which cannot only destroy mining infrastructure like roadways and ventilation systems but also cause asphyxiation and burial deaths, and even gas or coal
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Energies Free Full-Text A Review of Intelligent Unmanned Mining ...
2022.1.12 Intelligent unmanned mining is a key process in coal mine production, which has direct impact on the production safety, coal output, economic benefits and social benefits of coal mine enterprises. With the rapid development and popularization of 5G+ intelligent mines and coal mine intelligent equipment in China, the intelligentization of
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Slag discharge characteristics and engineering application
2022.1.11 Gas drainage through underground boreholes is the main method for gas control and utilization in soft high gassy seam. However, this method has technical problems including shallow drilling depth, low drilling efficiency, and frequent engineering accidents. This paper proposes a prismatic grooved drill pipe. To verify its slag discharge effect, a
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Borehole mining SpringerLink
Borehole mining is a general term for any process in which the wanted mineral or metal values of a deposit are fluidized in place by some means and removed from the deposit via borehole. Researchers have proposed (Shock and Conley, 1974; Anon., 1974a) that it should supplant the accepted, but narrower, term chemical mining, which implies that the
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Special Issue “Process Safety in Coal Mining” - MDPI
2023.7.28 The implementation of a coal mine in an underground reservoir is an effective means of realizing the protection and utilization of water resources in China’s western mining areas. One of the important standards for the safety of underground reservoirs in coal mines is to monitor the development of cracks in coal pillar dams.
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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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(PDF) Research on Directional Hydraulic Coal Cutting and
2023.7.26 Directional hydraulic coal mining technology can e ectively solve the problem of coal and gas outburst prevention in soft and hard composite coal seams and has good application prospects. 1.
Bavarder sur InternetEvaluation of Hydraulic Fracturing in Coal Seam using
2023.10.13 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 swarm
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Frontiers Research on the breaking mechanism of bolts and
2023.1.9 The gateway of the thick coal seam working face in the Datong mining area was excavated along a small coal pillar, resulting in serious bolt (cable) breaking failure, strong surrounding rock deformation, serious ground pressure appearance, and difficulties surrounding rock control. So, the bolt (cable) breaking characteristics and corresponding
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Investigation of Large-Diameter Borehole for
2020.12.30 The efficiency of gas extraction from the soft coal seam with ultralow permeability is low. Gas extraction with large-diameter borehole is proposed to deplete gas content for preventing gas outburst disaster in
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Energies Free Full-Text Application of Hydro Borehole Mining
2022.7.1 The article presents the impact of lignite mining on the environment associated with the introduction of hydro borehole mining (HBM) technology. The results are partially based on the HydroCoal Plus project results, where an environmental assessment of lignite HBM technology was performed. In order to reach the goals of the task, a life
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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
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Gas Flow Characteristics and Optimization of Gas Drainage Borehole ...
2020.11.13 As mining depth in coal mines increases, gas content, gas pressure, and absolute gas emission in deep coal seams increase gradually and dynamic disasters, such as coal and gas outburst, are becoming more dangerous (Zou and Lin 2018; Song et al. 2020; Su et al. 2020; Zhang et al. 2020).In addition, the coalbed methane (CBM) drained
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Investigation of Large-Diameter Borehole for Enhancing
2020.12.30 pipe for large-diameter directional long hole in coal mine [30]. Hua et al. proposed the super large-diameter borehole to control gas content in the upper corner of coal mining working face [31]. Yuan et al. established the theory of gas drainage in goaf by large-diameter surface drilling boreholes [32]. Meanwhile, Gao and Yang devoted a super ...
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(PDF) Optimizing the Structure of the Straight Cone Nozzle
2017.12.1 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
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Development and Application of Water Sealing Technology
2021.12.30 The poor sealing effect of gas extraction boreholes causes low efficiency of gas extraction. As a consequence, the requirements of coal mine safety production are often not attained. The sealing effect of boreholes depends not only on the sealing material itself but also on the combination degree between the material and the hole wall and the
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Gas flow field evolution around hydraulic slotted borehole in ...
2018.10.1 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
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Analysis of Application Parameters of Hydraulic Slotting
Hydraulic slotting technology is typically used in coal mines to enhance permeability and prevent gas outbursts. Because a coal seam contains many cleats and joints, this study investigated the influence of conventional application parameters on the hydraulic slotting effect by numerical simulation and experimental testing. The cleats in the coal generated
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The Underground Directional Drilling Technology and
2023.10.13 The diameter of borehole is usually 96 mm for the rock stratum and coal seam whose hardness factor is from 1 to 6. By combining the stabilizer with downhole motor, the main hole and branch holes are
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Frontiers Development and application of a borehole stress
2023.1.18 The Shaqu Coal Mine of Huajin Coking Coal Co., Ltd. is located in Liulin County, Luliang City, Shanxi Province, China. The mine strike length is 22 km, the inclined direction is 4.5–8 km wide, and the area is 138.35 km 2. The whole minefield is a gently inclined monoclinic structure with small local folds and faults.
Bavarder sur InternetSelecting the Optimal Borehole Drilling Pattern for
2023.12.6 Request PDF Selecting the Optimal Borehole Drilling Pattern for Methane Drainage in Underground Coal Mining: A Case Study in Iran The emission of gas from the coal seams is one of the most ...
Bavarder sur InternetStimulation Techniques of Coalbed Methane Reservoirs
2020.7.10 Over the last several decades, a series of stimulation techniques were developed to enhance tight oil and gas reservoir, including enhanced coalbed methane (ECBM) recovery [].The hydraulic techniques, such as hydraulic fracturing, hydraulic slotting, and hydraulic punching, are probably the most widely used in the ECBM, which fractures
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Recognition of Weak Microseismic Events Induced by Borehole Hydraulic ...
2023.12.21 Borehole hydraulic fracturing in coal mines can effectively prevent coal rock dynamic disasters. Accurately recognizing weak microseismic events is an essential prerequisite for the micro-seismic monitoring of hydraulic fracturing in coal seams. This study proposes a recognition method for weak microseismic waveforms based on ResNet-10
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Research on Gas Extraction Technology of Directional Long Borehole
2022.3.14 When the gas pressure of coal body is 3.5 Mpa, after 800 days of extraction, the area with gas pressure less than 0.74 Mpa around the borehole is less than 2.5 Mpa. The above analysis shows that the higher the gas pressure of coal body, the longer the time required for extraction to reach the standard.
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Frontiers Surrounding Rock Damage Characteristics and
2022.4.26 The support of roadways in soft coal seams is a challenge in deep coal mines. For gas-rich coal seams, many methods are developed to drain the gas before mining. The penetrating hydraulic reaming (PHR) is one of the most efficient methods to reduce the gas content and pressure in the coal seams. However, the PHR method will
Bavarder sur InternetMechanism and control of water seepage of vertical feeding borehole
2013.9.1 The vertical feeding borehole for the solid materials, which is located in a coal mine of Hebei province, passes through the fine sandstone of bedrock, and this fine sandstone is rich in water and has good permeability. Besides, the fine sandstone is a typical aquifer, and its hydrostatic pressure reaches 3 MPa. In order to control the water ...
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