Prolific research on a barren rock

2008 ◽  
Vol 7 (8) ◽  
pp. 600-602 ◽  
Author(s):  
Paul Ching-Wu Chu
Keyword(s):  
Barren Rock

Prehistoric Cart-tracks in Malta

Antiquity ◽  
1928 ◽  
Vol 2 (5) ◽  
pp. 18-25 ◽  
Author(s):  
T. Zammit
Keyword(s):  
Middle Part ◽  
The Other ◽  
Barren Rock ◽  
Coralline Limestone ◽  
As If

One of the problems that students of Maltese archaeology have to face is the meaning of the numerous cart-tracks furrowing most of the barren rock-surfaces. These tracks are scarce on Gozo and non-existent on the islands of Comino and Filfola.They consist of pairs of parallel grooves running for long distances on the hard coralline limestone patches, now straight and now curved as if avoiding an obstacle or having to change their direction. The grooves are mostly v-shaped, usually from 10 to 20 inches wide (25–50 cms) on the surface, and about 4 inches (10 cms) at the bottom. Between the two grooves, measured at the middle part, the distance is nearly always 4 feet 6 inches (1.37m). Naturally the depth of the grooves varies with the lie of the ground; if there is a strong tilt sideways, one of the grooves is shallow whilst the other is very deep.

Interaction between simulated rain and barren rock surface

1979 ◽  
Vol 11 (2) ◽  
Author(s):  
Gunnar Abrahamsen ◽  
Arne Stuanes ◽  
Kristian Bjor
Keyword(s):  
Rock Surface ◽  
Barren Rock ◽  
Simulated Rain

scholarly journals Analyzing methods of determining pre-destruction of blast hole vicinity

2021 ◽  
Vol 34 (04) ◽  
pp. 1448-1460
Author(s):  
Yevgeny B. Shevkun ◽  
Alexander V. Leshchinsky ◽  
Evgeny A. Shishkin ◽  
Yuri A. Lysak ◽  
Andrey Yu. Plotnikov
Keyword(s):  
Rock Mass ◽  
Blast Hole ◽  
Rock Massif ◽  
Energy Costs ◽  
Barren Rock ◽  
Rock Destruction ◽  
Strain Waves ◽  
Blast Energy ◽  
Mineral Wealth ◽  
Efficient Measure

The level of deformation of the rock massif of a blasted slab must be planned in advance, depending on the required results of blasting. Thus the energy costs of barren rock overfilling as part of preparing for overburden excavation are inefficient. On the contrary, an increase in the blast energy spent on degrading and breaking the ore mass is an efficient measure of preparing for the excavation of mineral wealth. There are currently two methods used to determine the pre-destruction of a blasted rock massif. The first one is based on determining the number of strain waves passing through locations of borehole charges. However, this method fails to determine the preliminary rock destruction level. The second method is based on determining coefficients of the pre-destruction of a rock massif by these strain waves. The merit of this method is that it allows evaluating the quality pattern of the pre-destruction of a rock massif. The procedure of considering the fraction of energy of the strain waves, reflected by the shielding rock mass to the destructive amount of blasting charges and refracted to this destroyed rock, is proposed.

The determination of tellurium in weathered outcrop, mineralized and barren rock

1977 ◽  
Vol 91 (2) ◽  
pp. 211-219 ◽  
Author(s):  
J.A. Corbett ◽  
W.C. Godbeer
Keyword(s):  
Barren Rock
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