Q-System Presentation - Bushveld Conference - Nov - Geohart ...
Q-System Presentation - Bushveld Conference - Nov - Geohart ...
Q-System Presentation - Bushveld Conference - Nov - Geohart ...
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PROBLEM<br />
Q - SYSTEM APPLICABILITY TO IMPALA<br />
Q<br />
= RQD x Ja<br />
x Jw<br />
Jn Jr SRF<br />
• Simplicity as a measure of block size, inter block<br />
shear strength, active stress & all critical factors<br />
associated with fog’s<br />
• Easy to use underground<br />
• Simple relationship between support required,<br />
- no support required and tunneling Q-index Q<br />
which can be easily modified to suit changing<br />
geotechnical conditions
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