Geomechanical assessment of mining conditions in the Khingansk manganese ore body

2014 ◽  
Vol 50 (1) ◽  
pp. 10-17 ◽  
Author(s):  
I. Yu. Rasskazov ◽  
B. G. Saksin ◽  
M. I. Potapchuk ◽  
V. I. Usikov
Keyword(s):  
Manganese Ore ◽  
Ore Body ◽  
Mining Conditions

Cymrite, a new barium mineral from the Benallt manganese mine, Rhiw, Carnarvonshire

1949 ◽  
Vol 28 (206) ◽  
pp. 676-681 ◽  
Author(s):  
W. Campbell Smith ◽  
F. A. Bannister ◽  
Max H. Hey
Keyword(s):  
Manganese Ore ◽  
Hexagonal Symmetry ◽  
X Ray ◽  
Ore Body

Among the specimens collected at the Benallt manganese mine in 1944 by Dr. A. W. Groves and myself was one (B.M. 1944,48) from the 60-foot level in no. 1 ore-body which showed on a face of dark, compact manganese ore colourless plates up to 7 mm. across and about ½ mm. thick. These plates proved to be uniaxial and negative with perfect basal cleavage. Heated in an ignition tube the fragments decrepirated, gave off water, and became pearly, white, and opaque. Qualitative tests showed Ba, Al, and SiO2 to be present. Preliminary X-ray photographs revealed hexagonal symmetry, but could not be matched with those of any known mineral.

Refinement of genetic and structural models of the Úrkút manganese ore deposit (W-Hungary, Europe) using statistical evaluation of archive data

2012 ◽  
Vol 4 (3) ◽  
Author(s):  
Lóránt Bíró ◽  
Márta Polgári ◽  
Tivadar Tóth ◽  
Tamás Vigh
Keyword(s):  
Tectonic Activity ◽  
Mathematical Treatment ◽  
Manganese Ore ◽  
Large Set ◽  
Ore Deposit ◽  
Ore Body ◽  
Significant Difference ◽  
Ore Characterization ◽  
Archive Data ◽  
Ore Types

AbstractAlthough the Úrkút manganese ore deposit in western placecountry-regionHungary has been exploited for at least 90 years, there are still numerous open questions concerning ore genetics as well as structure and geometry of the ore body. A large set of available archive data for the deposit have been reviewed and evaluated in order to solve some of the most crucial problems. For processing, besides diverse GIS approaches, univariate and multivariate statistical methods were used on the created unified database. The main aims of the mathematical treatment were giving a classification scheme for the wide spectrum of Mn-ores based on their chemical composition (Mn, Fe, Si, P) as well as evaluation of their spatial distribution. For the ore characterization and understanding the genetic processes, cluster and discriminant function analyses were used. Results of the multivariate treatment verified the existence of different ore types and provided an exact chemical definition for all of them. It alsoinferred that the main geochemical processes that took place in ore genesis were similar for all sample groups (ore types) with significantly different weights in each case.A 3D evaluation of the Úrkút mine heading map system shows that the ore body covers the footwall surface as a stratiform sheet throughout the study area. Palaeo-relief studies suggest a significant difference between the footwall and hanging wall morphologies which clearly implies tectonic activity following ore deposition. The deposit was affected by an E-W compression stress field near the Aptian-Albian transition causing folding of the Mn deposit.

scholarly journals Features of the mineral and chemical composition of the Northwest manganese ore occurrence in the Highveld region, South Africa

2021 ◽  
Vol 248 ◽  
pp. 195-208
Author(s):  
Aleksandr Evdokimov ◽  
Benedict Pharoe
Keyword(s):  
South Africa ◽  
Chemical Composition ◽  
Longitudinal Distribution ◽  
Manganese Ore ◽  
X Ray ◽  
Mining Areas ◽  
Ore Body ◽  
Ore Minerals ◽  
Northwest Region ◽  
Northwest Province

The Northwest manganese ore mineralisation is located at a relative distance from traditionally known manganese mining areas in a new manganese-bearing region (Highveld) in the Northwest Province, Republic of South Africa. The ore occurrence was studied on farms: Buchansvale 61 IQ, Weltevreden 517 JQ, Rhenosterhoek 343 JP and Kafferskraal 306 JP. The data obtained from studying the geology of the area pointed out to interests regarding the development criterias for search of similar ore mineralisations in the northwest region of South Africa. The ore occurs predominantly in the form of powdered manganese wad, manganese nodules and crusts, confined to the karstic structures of the upper section of the dolomites. X-ray powder diffraction (XRD), Scanning electron microscopy with energy dispersive link (SEM-EDS) and X-ray fluorescence were utilized to unveil the mineral and chemical composition of the ore samples. The present study therefore presents the results on both chemical and mineral composition of manganese ores, and their depth and longitudinal distribution. Karstic areas causing an increased local thickness of the ore body were identified. The geochemical and microspcopic study of the ores indicates their supergene nature. The main ore minerals includes cryptomelane, lithiophorite, purolusite, hollandite and romanechite associated with impurity components of Ba, Ce, Co, La, Cr, Zn and V.

scholarly journals Modified ground support with alternative fill material for ground control at munsar underground manganese mine of moil limited, India

2019 ◽  
Vol 2 (1) ◽  
pp. 69-77
Author(s):  
Ganesh Manekar ◽  
Dipankar Shome ◽  
Mukund Chaudhari
Keyword(s):  
Rock Mechanics ◽  
Underground Mining ◽  
Central India ◽  
Underground Mines ◽  
Manganese Ore ◽  
Opencast Mining ◽  
Mining Equipment ◽  
Ground Support ◽  
Ore Body ◽  
Fill Material

Abstract MOIL Limited is operating 7 underground and 3 opencast mines in central India and producing annually more than 1.3 million tonnes of various grades of manganese ore. The underground mines are operating at shallow – 90 m at Munsar mine to moderate – 353 m at Balaghat mine below the surface with horizontal cut and fill (HCF) or its variant method of stoping with post filling by hydraulic sand stowing. The Munsar mine is being worked underground since 1903. The opencast mining is presently stopped. The ore body below the opencast quarry is geological continuity of the area excavated in past by opencast method of mining. The underground mining is done through the adit in three levels i.e. 270’L, 220’L, 170’L and by incline in western part of the property at 70’L. The horizontal drift development has been developed in the manganese ore body with sill drive of 5 m above the sill pillar in lower level at 70’L and barrier pillar of 5 m thickness is left for protection of upper level at 170’L. Valuable mineral has been locked in sill pillar and therefore rock mechanics investigations have been carried out. On the basis of study now the drift development has been carried out in footwall rock at 70’L, (-) 30’L and below levels and it has improved the minable manganese ore by about 20%. In this modified HCF stope design, an alternative fill material in place of sand, which has been developed in house by use of overburden (OB) material after treatment, has been used for hydraulic stowing. The experimental trials find out that the alternative fill material of OB is more compact and forms a non-expansion floor for the men and machines in the stope. This will certainly help in the introduction of mobile underground mining equipment for drilling in the stopes and mechanical mucking, transportation and loading of the ROM. The paper presents rock mechanics investigations and future use of alternative fill material of overburden material after heat treatment for better safety and productivity at Munsar Mine of MOIL.

Banalsite crystals from Wales

1945 ◽  
Vol 27 (188) ◽  
pp. 63-64 ◽  
Author(s):  
W. Campbell Smith
Keyword(s):  
Thin Section ◽  
Crystal Form ◽  
Manganese Ore ◽  
Small Cavity ◽  
Ore Body ◽  
Irregular Boundaries

Banalsite, the new orthorhombic barium-felspar, was described from coarsely crystalline but massive material found as thin bands traversing manganese ore at the Benallt mine, Rhiw, Carnarvonshire. Up to the time of the reading of the paper which announced the discovery of the mineral no crystals had been found except two showing indications of faces seen in a thin section of one of the veins. The only other indications of crystal form were lines of black inclusions seen in thin section within the irregular boundaries of crystals forming the vein-material. Now I have been fortunate to find, in a specimen recently collected by Dr. A. W. Groves from no. 5 ore-body in the Benallt mine, a small cavity containing minute crystals of banalsite.

The Nature of Mining-Induced Horizontal Displacement of Surface on the Example of Several Coal Mines

2014 ◽  
Vol 59 (4) ◽  
pp. 971-986 ◽  
Author(s):  
Krzysztof Tajduś
Keyword(s):  
Underground Mining ◽  
Mining Industry ◽  
Horizontal Displacement ◽  
Surface Slope ◽  
Proportionality Coefficient ◽  
Model Studies ◽  
Displacement Vectors ◽  
Mining Conditions ◽  
Design Projects ◽  
Academy Of Sciences

Abstract The paper presents the analysis of the phenomenon of horizontal displacement of surface induced by underground mining exploitation. In the initial part, the basic theories describing horizontal displacement are discussed, followed by three illustrative examples of underground exploitation in varied mining conditions. It is argued that center of gravity (COG) method presented in the paper, hypothesis of Awierszyn and model studies carried out in Strata Mechanics Research Institute of the Polish Academy of Sciences indicate the proportionality between vectors of horizontal displacement and the vector of surface slope. The differences practically relate to the value of proportionality coefficient B, whose estimated values in currently realized design projects for mining industry range between 0.23r to 0.42r for deep exploitations, whereas in the present article the values of 0.33r and 0.47r were obtained for two instances of shallow exploitation. Furthermore, observations on changes of horizontal displacement vectors with face advancement indicated the possibility of existence of COG zones above the mined-out field, which proved the conclusions of hitherto carried out research studies (Tajduś 2013).

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

2018 ◽  
pp. 36-48
Author(s):  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. V. Gorbunov ◽  
V. A. Khazhiev ◽  
V. Yu. Zalyadnov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
High Concentration ◽  
Open Pit Mines ◽  
Blasting Operation ◽  
Internal Dump ◽  
Mining Conditions ◽  
Mining Front ◽  
Comparison Of Equipment

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

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