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We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
We هي شركة ذات تقنية عالية تدمج البحث والتطوير والإنتاج والتوزيع ، وتوفر كسارة ، وصنع الرمال ، ومعدات طحن ، ومحطة تكسير متنقلة ، إلخ.
2023/9/1 The hydraulic model of roof (floor) water inrush in near-fault coal mining under “double pressure” control is established. A new method for calculating the width of waterproof احصل على السعر
2021/11/10 In this paper, the coupling model of high-pressure water jet coal flushing and crushing was established, and the damage evolution of coal body under the impact of high احصل على السعر
A miner using a hydraulic jet to mine for gold in California, from The Century Magazine January 1883. Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. [1] In the احصل على السعر
2023/11/24 This study focused on the water-inrush risks associated with close-distance mining of thin coal seams under with pressure, using a single working face of the Yangcun احصل على السعر
2022/1/14 The technology of increasing coal seam permeability by high-pressure water jet has significant advantages in preventing and controlling gas disasters in low-permeability coal احصل على السعر
2023/4/3 The research related to WRI in underground coal mining mainly focuses on the water inrush form roof and floor, water weakening of roadway surrounding rock (coal pillar), احصل على السعر
2022/1/7 The working face is seriously threatened by limestone aquifer with high-water pressure in coal seam floor when Permo-Carboniferous coal is mined in North China Coalfield. احصل على السعر
2021/1/24 Mine water hazards are often caused by mine water inrushes. Mine water inrush is a phenomenon in which a large volume of water unexpectedly gushes into underground احصل على السعر
2017/3/13 When mining at great depth, high-pressure karstic water inrush can pose a serious threat. We used physical simulations to investigate channel inception, evolution, and احصل على السعر
2020/10/27 Karstic water damage is one of the main disasters that threatens safe production in coal mines. As coal mining in China moves toward deeper strata, deep karst احصل على السعر
2019/5/27 The rated power, voltage, and flow of the high-pressure water pump in the system are 75 kW, 660 V, and 75 L/min, respectively, and the rated pressure during slotting is احصل على السعر
2021/1/1 Large-scale and high intensity coal mining will change the mining area ecosystem, and it is difficult to recover the vegetation and ecological water level after mining. احصل على السعر
Based on the geological occurrence of the No. 3 coal seam and mountain No. 4 coal seam in the Yanzishan coal mine, the high-pressure water jet pressure relief technology of residual coal احصل على السعر
High-pressure water jet technology has been widely used for the scale removal, rust removal or other cleaning opera-tions of containers, heat exchangers, condensers, pipes and so on in احصل على السعر
Research Article Research on the Coal Seam Permeability-Increasing Technology via High-Pressure Water Jet Reaming and Its Application Xingang Niu ,1,2,3,4 Biming Shi,1,2 Zhigang احصل على السعر
2021/1/1 Large-scale and high intensity coal mining will change the mining area ecosystem, and it is difficult to recover the vegetation and ecological water level after mining. احصل على السعر
Based on the geological occurrence of the No. 3 coal seam and mountain No. 4 coal seam in the Yanzishan coal mine, the high-pressure water jet pressure relief technology of residual coal احصل على السعر
High-pressure water jet technology has been widely used for the scale removal, rust removal or other cleaning opera-tions of containers, heat exchangers, condensers, pipes and so on in احصل على السعر
Research Article Research on the Coal Seam Permeability-Increasing Technology via High-Pressure Water Jet Reaming and Its Application Xingang Niu ,1,2,3,4 Biming Shi,1,2 Zhigang احصل على السعر
Based on the geological occurrence of the No. 3 coal seam and mountain No. 4 coal seam in the Yanzishan coal mine, the high-pressure water jet pressure relief technology of residual coal احصل على السعر
Hydraulic mining utilizes the force of water sprayed under high pressure to extract coal. Hydraulic mining utilizes continuous miners to mine entries to gain access to production panels. Once a احصل على السعر
2019/11/1 This study analyzed the failure characteristics of the coal seam floor induced by longwall mining to manage and eliminate possible hazards associated with high pressure (8.0 احصل على السعر
2016/9/1 There are two ways for high-pressure water jet to cut the coal. Fig. 1 a demonstrates that high-pressure water jet can cut the coal in a discontinuous and rotational احصل على السعر
2020/11/10 The technology of coal breaking and punching by a high-pressure water jet can increase the permeability of coal seam and prevent gas explosion accidents.احصل على السعر
2022/3/1 Coal mine water inrush threatens mining operations, pollutes the environment, and wastes significant water resources [17], [18]. The Yanzhou mining area is a typical North احصل على السعر
2023/1/21 The hydro-cutting tests of coal seam performed in the Experimental Mine “Barbara” in Poland proved that the increase in water pressure in the range 20–40 MPa only احصل على السعر
2022/1/13 Based on the geological occurrence of the No. 3 coal seam and mountain No. 4 coal seam in the Yanzishan coal mine, the high-pressure water jet pressure relief technology احصل على السعر
2018/8/3 This paper is concerned with the mechanism of coal breakage under high-pressure water jet (HPWJ) and its applications. A model of HPWJ impinging on coal target احصل على السعر
2021/12/1 Ultra-high-pressure hydraulic cutting: Cutting a series of slots in coal body with H–P water (up to ∼100 MPa) to reduce in-situ stress. Anthracite or other kinds of coal with احصل على السعر
