E-resources
Peer reviewed
-
Li, Yanliang; Peng, Jianming; Zhang, Pengyu; Huang, Chaoyang
International journal of rock mechanics and mining sciences (Oxford, England : 1997), December 2021, 2021-12-00, 20211201, Volume: 148Journal Article
Existing numerical simulation studies show that confining pressure has a negative effect on the efficiency of percussion drilling. However, the corresponding systematic experimental studies considering confining pressure have rarely been reported. In this study, single drop weight impact tests were performed on granite samples and the influence of the confining pressure on the crater parameters was analyzed. Besides, the fluorescent approach was adopted to observe the cracks in the damaged samples. The results indicate that confining pressure has a significant adverse effect on rock fragmentation. For instance, the average volume of crater under confining pressure of 20 MPa is 91.5% smaller than that without confining pressure. Meanwhile, the higher the confining pressure, the shorter the cracks. The confining pressure can inhibit the propagation of side cracks around the crater and hinder the expansion of radial cracks to the free surface. Knowing these phenomena and conclusions, we may be able to eliminate or reduce the negative effect of the confining pressure by optimizing the working parameters of the drilling tools and the layout structure of the buttons on the bit. •The dynamic rock fragmentation performance with confining pressure has been systematically studied by experiments.•The influence of the confining pressure on the crater parameters is quantitatively analyzed.•Crack evolution under confining pressure was revealed by the fluorescent approach.•Confining pressure has a significant adverse effect on dynamic rock fragmentation.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.