scholarly journals INCREASING THE EFFICIENCY OF ROOF BOLTING SUPPORTING CONVEYOR ROADWAY 555 PROTECTED BY A YIELD PILLAR IN THE CONDITIONS OF MINE CHERTINSKAYA-KOKSOVAYA

2021 ◽  
pp. 94-103
Author(s):  
Vadim N. Shcherbakov ◽  
Pavel V. Grechishkin ◽  
Elena A. Zelyaeva ◽  
Yaroslav I. Zaitsev
Keyword(s):  
Roof Bolting ◽  
Yield Pillar

Evaluation of Roof Bolting Requirements Based on In-Mine Roof Bolter Drilling

2004 ◽  
Author(s):  
Syd S. Peng
Keyword(s):  
Roof Bolting ◽  
Roof Bolter ◽  
Mine Roof

Design of roof bolting as the solution of a contact problem

1983 ◽  
Vol 19 (6) ◽  
pp. 455-458
Author(s):  
N. S. Bulychev ◽  
D. I. Kolin
Keyword(s):  
Contact Problem ◽  
Roof Bolting

scholarly journals Effects of proper drilling control to reduce respirable dust during roof bolting operations

2016 ◽  
Vol 3 (4) ◽  
pp. 370-378 ◽  
Author(s):  
Mingming Li ◽  
Yi Luo ◽  
Hua Jiang
Keyword(s):  
Respirable Dust ◽  
Roof Bolting

Aspects of studying roof bolting operation using polarized-light optical method

Rock Bolting ◽  
2021 ◽  
pp. 225-231
Author(s):  
N.A. Filatov ◽  
G.A. Ievlev
Keyword(s):  
Optical Method ◽  
Polarized Light ◽  
Roof Bolting

Drill steel research to reduce roof bolting machine operator noise exposure

2007 ◽  
Vol 121 (5) ◽  
pp. 3042-3042
Author(s):  
Jeffrey Shawn Peterson
Keyword(s):  
Noise Exposure ◽  
Roof Bolting ◽  
Steel Research ◽  
Machine Operator

Mining-induced deformation in potash yield pillars, Vanscoy, Saskatchewan

1993 ◽  
Vol 30 (2) ◽  
pp. 297-307 ◽  
Author(s):  
Rui Chen ◽  
W. C. Brisbin ◽  
B. Stimpson
Keyword(s):  
Shape Change ◽  
Progressive Failure ◽  
Shear Zones ◽  
Grain Boundary Sliding ◽  
Bulk Rock ◽  
Yield Pillar ◽  
Fabric Analysis ◽  
Yield Pillars ◽  
Clay Layers ◽  
Potash Mine

Mining-induced deformation of potash yield pillars in the Cominco potash mine at Vanscoy, Saskatchewan, has been documented by mapping deformational structures, determining changes in pillar width and in thicknesses of potash and interbedded clay layers, and analyses of rock fabrics in samples collected from three yield pillars. Pillar deformation over a period of 8 years can be shown to have involved progressive bulk rock flattening, followed by development of shear zones at pillar corners, development of shear wedges at pillar margins, and detachment of these wedges into adjacent rooms. Furthermore, this sequence appears to be repetitive. Strain in halite involves fracturing and displacement and rotation of fragments, strain in sylvite is continuous, and grain boundary sliding has been an important mechanism in the deformation. Although the fabric anisotropy cannot be used to assess total bulk rock strain, the component of strain related to sylvite shape change has been examined during progressive failure of the pillars. The values of strain in the principal strain directions based on sylvite shape are estimated as 42% shortening in the subvertical direction, 37% subhorizontal elongation perpendicular to the original openings, and 25% subhorizontal elongation parallel to the original openings. Key words : yield pillar, potash, fabric analysis, induced deformation.

Sign in / Sign up

Export Citation Format

Share Document