MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Directional microblasting under choledochoscope
Choledochoscopy: An update PMC
Probebased confocal laser endomicroscopy captures microscopic images of living tissue for realtime histological tissue assessment under direct visualization Compatibility with DSOC was demonstrated in a study by Tanisaka et al involving 30 patients with indeterminate biliary 1978年9月1日 The right rectus muscle is transected with diathermy, and in the midline the linea alba is divided This provides excellent exposure in the correct direction to accommodate the Choledochoscopy ScienceDirectPeroral cholangioscopy can currently be divided into two types The first is catheterbased peroral indirect choledochoscopy and includes the biliary tract main and submirror type and The Status and Development of Oral Choledochoscopy Diagnosis Fogarty balloons passed through the subcostal port may be used alongside retrieval baskets through the choledochoscope, attempting to evert such a pouch, dislodge a stone, and Utilization of Laparoscopic Choledochoscopy During Bile Duct
The role of choledochoscopy in the diagnosis and management of
Development of new ancillary equipment, small enough in diameter to fit through the accessory channel of the choledochoscope, has brought added versatility to diagnostic and therapeutic 2022年3月30日 There are two approaches to common bile duct exploration and choledocholithotomy in the First Medical Center, Chinese People's Liberation Army General Analysis of Laparoscopic Ultrathin Choledochoscope Curative 2020年9月7日 Our paper outlines the data from the cohort of patients who had choledochoscopic bile duct exploration (CBDE), at time of laparoscopic cholecystectomy, for Retrospective comparative analysis of choledochoscopic bile duct 2017年10月10日 Choledochoscope combined with microblasting lithotripsy via Ttube was another potential approach for impacted stones and retained stones after failed LCBDE In our Endoscopic retrograde cholangiopancreatography versus
Management of cholelithiasis with choledocholithiasis: Endoscopic
Endoscopic laser lithotripsy has been used to fragment large stones under fluoroscopic visualization, because of the risk of heatinduced biliary damage Today, singleoperator 2016年10月31日 Conclusions: Singlestep LC+LTCBDE using an ultrathin choledochoscope may provide better outcomes in patients with gallstones and suspected choledocholithiasis Ultrathin choledochoscope improves outcomes in the treatment of 2024年3月28日 The drillingblasting method 1,2 can harm the surrounding rock, compromising the stability of the rock mass 3,4Techniques like smoothsurface charge blasting and directional blasting can mitigate Research on directional rock blasting based on different slotted 2024年9月20日 They used the optimal decoupling coefficient of slit charge from 15 to 20 under directional blasting Cheng et al [19] Synthesis and characterization of micro/nano capsules of PMMA/capric–stearic acid eutectic mixture for low temperaturethermal energy storage in buildings Energ Buildings (2015)Research on directional blasting of multiple slit charge
Directional Fracturing by SlottingBlastingCaused
2019年3月1日 Download Citation Directional Fracturing by SlottingBlastingCaused Stress Wave Form Changes Slotting blasting is widely used for directional fracture in geotechnical engineering Due to 2020年9月22日 Tian et al [9] based on the action mechanism of empty hole directional blasting, the influence of charge hole spacing on crack propagation is studied, deduced the calculation formula of charge (PDF) Influence of Charge Hole Spacing on the Crack Propagation 2017年12月31日 He devised a bilateral energygathering tensile blasting technique which achieved directional blasting in rock masses, the device was designed with a tubular shape that allows the borehole to be Directional Destress with Tension Blasting in Coal Mines2024年8月1日 Through the research on slotted hydraulic blasting under the actual construction scale, the simulation results showed that the slotted hydraulic blasting method can cause directional fracture to the rock in the slot direction under the actual construction scale, which shows that the method has a good directional fracture effect under the actual construction scaleExperimental study on directional fracturing by slotted hydraulic
Studies on directional breaking controlled theory of slotted
2021年8月31日 This paper adopts the red sandstone as blasting medium, studies the mechanism of rock breaking caused by slotted cartridge blasting, analyzes the crack distribution characteristics, sets up “rockexplosion crack” of threedimensional reconstruction model, and accurately describes the explosion crack location and the shape of space distribution The Airbrasive’s MicroAbrasive Blasting System uses a gaspropelled stream of uniformlysized abrasive particles, finely controlled by a vibrator, to remove material from a work piece Home MicroBlasting 101 Why Airbrasive Products MicroAbrasive Blasting Units Powders Blast Media Parts AccessoriesMicroBlasting 101 Airbrasive2023年6月17日 Directional blasting (Xue et al, 2019; Bhagat et al, 2020) is commonly used in mining engineering, which assures smooth blasting surfaces along the connecting lines of blasting holes at expected positions Numerical simulations help engineers improve the blasting designs such as explosives and spacing of blastingNumerical Analysis of Directional Rock Blasting with Continuous Under the variation of strain field of the model, the damage within the model, as defined by Eq (6), also evolves gradually (Fig 9) The first row exhibits compressiontension mixed damage under opaque conditions, while the second row presents Investigation on directional rock fracture mechanism under
Experimental study of crack propagation in polymethyl methacrylate
2013年8月1日 The crack propagation behaviours of polymethyl methacrylate material with double holes under the directional controlled blasting are studied using dynamic caustic method2019年8月20日 This innovative approach relies on directional presplit blasting (DPB), which can cut off entry roof along with the mining side of entry roof, leading to the change of entry roof structure Under the action of periodic mining pressure, the goaf roof is caved along the precracked surfaceDirectional presplit blasting in an innovative nopillar mining 2019年5月23日 Since the cutting seam cartridge has sound directional breaking effect, in order to explore its blasting wave mechanism, an experimental study was conducted on the blast wave of a cutting seam Experimental Study on Directional Fracture Blasting 2020年5月1日 Download Citation Experimental research on the dynamic propagation process of mode I cracks in the rock under directional fracture blasting using the strain gauge method Based on the Experimental research on the dynamic propagation process of
Experimental Study on the Directional Effect of Damage in Marble Under
2024年2月29日 The surrounding rock of a tunnel is subjected to cyclic impacts from different directions in tunnel engineering construction, resulting in directional damage to the rock mass To investigate the impact direction effects on damage, a split Hopkinson pressure bar (SHPB) system was utilized to conduct cyclic impact tests on marble The dynamic mechanical response of 2023年9月20日 The results have certain guiding significance for rock blasting technology, surrounding rock control technology, and similar directional fracturing engineering in the karst area of Guizhou Study on Mechanism of Cumulative Directional Blasting of Brittle 2022年1月1日 Compared with ordinary charge blasting, the slit charge blasting realizes the directional fracture of rock mass by controlling the blasting stress field and the quasistatic effect of blasting gas, so as to achieve the purpose of reducing overbreakunderbreak and ensuring the quality of peripheral contour forming [4]Therefore, Yang et al [5] analyzed the change law of Directional fracture behavior and stress evolution process of the 2024年2月9日 Smooth blasting is widely employed in civil and mining engineering for rock contour excavation [1], [2]In the last decades, owing to the depletion of shallow resources, smooth blasting has been applied to rock perimeter excavation under high geostress with the development of deep tunnelling and mining [3], [4], [5]Under this scenario, the evolution of Study on rock fracturing in smooth blasting under initial stress
(PDF) Influence mechanism of the diameter of the energy
2024年3月4日 The findings reveal that, except for the 2 mm case, bidirectional cumulative tension blasting effectively produces directional cracks aligned with the energy accumulation direction2023年10月10日 Roofcutting blasting by explosives involves certain operational risks and is prone to cause damage to surrounding rock Accordingly, a new nonexplosive directional rockbreaking technology called Instantaneous Expansion with a Single Fracture (IESF) has been developed This paper focuses on the research of the crack propagation behavior and damage Crack Propagation Behavior and Damage Extent of Rock Mass under The crack propagation behaviours of polymethyl methacrylate material with double holes under the directional controlled blasting are studied using dynamic caustic method A series of dynamic caustic patterns at the propagating crack tip under the explosive loading are recorded using the digital highspeed cameraExperimental study of crack propagation in polymethyl methacrylate damage model for blasting, positing that rock damage is triggered by the collective eects of stress waves and explosive gas Yang et al analyzed the dissipation law of sound waves during the process of rock blasting damage and introduced fractal theory into the realm of blasting damage investigation (Yang 2000; Yang and Jin 2018)An Innovative Mechanism of Directional Rock Cracking
Numerical simulation of directional fracturing by shaped charge blasting
2020年1月29日 He devised a bilateral energygathering tensile blasting technique which achieved directional blasting in rock masses, the device was designed with a tubular shape that allows the borehole to be 2022年1月24日 Chen et al 12 studied fracturing characteristics under coupling action of static pressure and delay blasting based on the concrete doublehole explosion test, and found that fragmentation degree Damage of Rock Mass by DoubleHole Blasting with Slit Charge Download scientific diagram Charge structure and directional roofcutting mechanism of shaped charge hydraulic blasting (SCHB) from publication: Shaped Charge Hydraulic Blasting: An Charge structure and directional roofcutting mechanism of 2015年5月25日 Request PDF Analysis of empty hole effect in directional fracture controlled blasting A new experimental system of digital laser dynamic caustics was used and the distribution of dynamic Analysis of empty hole effect in directional fracture controlled
The mechanism of directional fracture controlled blasting and its
Synthetically using methods including high speed laser tattoo shadow, super dynamic strain testing technology, digital laser dynamic caustics experimental system, this paper studies the cutting seam cartridge explosion wave propagation mechanism, multiangle observation of the detonation wave propagation process, clearly observed explosion stress wave and explosive 2023年10月10日 The drillingblasting method 1, 2 can cause damage to the surrounding rock, affecting the stability of the overall rock mass 3, 4 Smoothsurface charge blasting and directional blasting technology can reduce the damage to the surrounding rock, however, these techniques still have many issues, such as overblasting and underblasting, protection of the reserved rock Directional rock blasting using shaped charges using combined 2018年10月3日 Affected by mining activities, 3−1103 tailgate of Hongqinghe coal mine is seriously deformed The floor of tailgate cracking and tilting, and two ribs appearing in the net bag, which affects normal transportation and pedestrians To solve this difficulty, this paper study on the technology of directional fracturing blasting for pressure relief of dynamic pressure Research on Roof Cutting and Pressure Releasing Technology of 2019年7月1日 In situ stress in deep rock masses has a significant effect on directional fracturing during slit charge blasting In this paper, the stress distribution around a borehole under high static stress Crack propagation behavior in slit charge blasting under high
Research on directional rock blasting based on different slotted
2024年3月28日 The drillingblasting method 1,2 can harm the surrounding rock, compromising the stability of the rock mass 3,4Techniques like smoothsurface charge blasting and directional blasting can mitigate 2024年9月20日 They used the optimal decoupling coefficient of slit charge from 15 to 20 under directional blasting Cheng et al [19] Synthesis and characterization of micro/nano capsules of PMMA/capric–stearic acid eutectic mixture for low temperaturethermal energy storage in buildings Energ Buildings (2015)Research on directional blasting of multiple slit charge2019年3月1日 Download Citation Directional Fracturing by SlottingBlastingCaused Stress Wave Form Changes Slotting blasting is widely used for directional fracture in geotechnical engineering Due to Directional Fracturing by SlottingBlastingCaused2020年9月22日 Tian et al [9] based on the action mechanism of empty hole directional blasting, the influence of charge hole spacing on crack propagation is studied, deduced the calculation formula of charge (PDF) Influence of Charge Hole Spacing on the Crack Propagation
Directional Destress with Tension Blasting in Coal Mines
2017年12月31日 He devised a bilateral energygathering tensile blasting technique which achieved directional blasting in rock masses, the device was designed with a tubular shape that allows the borehole to be 2024年8月1日 Through the research on slotted hydraulic blasting under the actual construction scale, the simulation results showed that the slotted hydraulic blasting method can cause directional fracture to the rock in the slot direction under the actual construction scale, which shows that the method has a good directional fracture effect under the actual construction scaleExperimental study on directional fracturing by slotted hydraulic 2021年8月31日 This paper adopts the red sandstone as blasting medium, studies the mechanism of rock breaking caused by slotted cartridge blasting, analyzes the crack distribution characteristics, sets up “rockexplosion crack” of threedimensional reconstruction model, and accurately describes the explosion crack location and the shape of space distribution The Studies on directional breaking controlled theory of slotted Airbrasive’s MicroAbrasive Blasting System uses a gaspropelled stream of uniformlysized abrasive particles, finely controlled by a vibrator, to remove material from a work piece Home MicroBlasting 101 Why Airbrasive Products MicroAbrasive Blasting Units Powders Blast Media Parts AccessoriesMicroBlasting 101 Airbrasive
Numerical Analysis of Directional Rock Blasting with Continuous
2023年6月17日 Directional blasting (Xue et al, 2019; Bhagat et al, 2020) is commonly used in mining engineering, which assures smooth blasting surfaces along the connecting lines of blasting holes at expected positions Numerical simulations help engineers improve the blasting designs such as explosives and spacing of blastingUnder the variation of strain field of the model, the damage within the model, as defined by Eq (6), also evolves gradually (Fig 9) The first row exhibits compressiontension mixed damage under opaque conditions, while the second row presents Investigation on directional rock fracture mechanism under