Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Longchen Duan"'
Publikováno v:
地质科技通报, Vol 43, Iss 3, Pp 200-217 (2024)
Significance Impregnated diamond bits (IDBs) have been widely used in various hard rock drilling activities, especially deep drilling. Drilling process with IDBs relies on diamond edge wrapped by metal matrices to break the rock formation, which mean
Externí odkaz:
https://doaj.org/article/5346c153d5214bc89c4b461be1fbe327
Publikováno v:
Materials, Vol 17, Iss 11, p 2645 (2024)
Various contents of carbon fibers (CFs) and potassium titanate whiskers (PTWs) were added to an Fe-based impregnated diamond bit (IDB) matrix to enhance its adaptability to percussive–rotary drilling. A series of mechanical tests were conducted suc
Externí odkaz:
https://doaj.org/article/8e0beb91844d4ee49920403f072523f4
Publikováno v:
地质科技通报, Vol 42, Iss 3, Pp 323-330 (2023)
High-voltage electropulse boring (EPB) is a new drilling method with great potential for drilling and industrialization. The existing high-voltage electropulse boring damage model based on PFC2D does not calibrate the parameters of the rock used in t
Externí odkaz:
https://doaj.org/article/1b8469ffada2435f9b4314f210a24104
Publikováno v:
Jin'gangshi yu moliao moju gongcheng, Vol 43, Iss 2, Pp 151-160 (2023)
The hot-pressing sintering experiments were carried out under the conditions of sintering temperature of 950 ℃, holding time of 5 mins and different sintering pressures. The effects of sintering pressure on the properties of three kinds of low liqu
Externí odkaz:
https://doaj.org/article/1cb2183cab8246779dec207716d48564
Publikováno v:
Jin'gangshi yu moliao moju gongcheng, Vol 43, Iss 2, Pp 161-169 (2023)
Reinforced concrete structure has been widely applied in modern society, while its cutting process is very complicated. To solve the inaccurate problem due to grid deformation in conventional finite element method, smoothed particle hydrodynamics (SP
Externí odkaz:
https://doaj.org/article/5092147c23824af8b5e90f2c777fb071
Publikováno v:
Jin'gangshi yu moliao moju gongcheng, Vol 42, Iss 6, Pp 656-661 (2022)
The diamond retention of traditional impregnated diamond matrix comes from the mechanical holding force. The residual compressive stress on the diamond surface is an important index used to evaluate the mechanical holding force. The existing calculat
Externí odkaz:
https://doaj.org/article/4d6927889d174c56831e3470f97fcf6c
Publikováno v:
Jin'gangshi yu moliao moju gongcheng, Vol 42, Iss 5, Pp 511-517 (2022)
In recent years, diamond tools are developing in new directions such as complex shape, precise structure and high-end performance. However, limited by the forming principle, it is difficult to meet the above requirements through conventional manufact
Externí odkaz:
https://doaj.org/article/7aeb4446f8114e4b9c65dece637a775f
Publikováno v:
Shuiwen dizhi gongcheng dizhi, Vol 48, Iss 1, Pp 195-202 (2021)
Exploration of hot dry rock in China has just started. In order to accurately evaluate the amount of hot dry rock geothermal resources in China, high-quality hot dry rock drilling cores are needed. However, there are few researches on coring drilling
Externí odkaz:
https://doaj.org/article/e70999df71174685a227276ddccfd97d
Publikováno v:
Energies, Vol 15, Iss 10, p 3824 (2022)
It is necessary to develop new drilling and breaking technology for hard rock construction. However, the process of high-voltage electro-pulse (HVEP) rock-breaking is complex, and the selection of electro-pulse boring (EPB) process parameters lacks a
Externí odkaz:
https://doaj.org/article/31dba1432b184edda0e63f1b278538ee
Publikováno v:
Applied Sciences, Vol 11, Iss 22, p 11037 (2021)
In view of the stick-slip phenomenon in deep and hard rock drilling, a new type of torsional impactor that can provide torsional impact vibration was designed. According to the working principle and structural characteristics of the designed torsiona
Externí odkaz:
https://doaj.org/article/ccc1275769fb4e5398d20f2b25d345bc