scholarly journals Increasing stability of underground mine workings by forming new geotechnical properties of adjoining layers via roller compaction

2016 ◽  
Vol 10 (1) ◽  
pp. 44-49
Author(s):  
V Kravets ◽  
◽  
S Zaychenko ◽  
G Gayko ◽  
◽  
...  
Keyword(s):  
Geotechnical Properties ◽  
Underground Mine ◽  
Roller Compaction ◽  
Underground Mine Workings ◽  
Mine Workings

Stability Evaluation of Old and Unapproachable Underground Mine Workings below Surface Structures

2019 ◽  
Vol 93 (3) ◽  
pp. 351-359 ◽  
Author(s):  
Angad Kushwaha ◽  
Subhashish Tewari ◽  
Prabhat Kumar Mandal ◽  
Rana Bhattacharjee ◽  
Arka Jyoti Das ◽  
...  
Keyword(s):  
Underground Mine ◽  
Surface Structures ◽  
Stability Evaluation ◽  
Underground Mine Workings ◽  
Mine Workings

GPR measurements for locating underground mine workings at an active open-pit mine

1992 ◽  
Author(s):  
Jeffrey J. Daniels ◽  
Dwayne Harris ◽  
Roger Roberts ◽  
Brian Schilling
Keyword(s):  
Open Pit Mine ◽  
Underground Mine ◽  
Open Pit ◽  
Underground Mine Workings ◽  
Mine Workings

Modelling of radon hazards in underground mine workings

2019 ◽  
Vol 695 ◽  
pp. 133853 ◽  
Author(s):  
Krystian Skubacz ◽  
Małgorzata Wysocka ◽  
Bogusław Michalik ◽  
Wacław Dziurzyński ◽  
Andrzej Krach ◽  
...  
Keyword(s):  
Underground Mine ◽  
Underground Mine Workings ◽  
Mine Workings

scholarly journals Improving the efficiency of tunneling underground mine workings with the use of blasthole charges with Munroe effect

2020 ◽  
pp. 15-23
Author(s):  
Farkhodbek Umarov ◽  
◽  
Utkir Nasirov ◽  
Gafur Nutfulloev ◽  
Zoir Nazarov ◽  
...  
Keyword(s):  
Rock Mass ◽  
Explosive Charge ◽  
Underground Mine ◽  
Theoretical Research ◽  
Hydrodynamic Theory ◽  
Energy Concentration ◽  
Face Advance ◽  
Efficiency Ratio ◽  
Underground Mine Workings ◽  
Mine Workings

Introduction. Various techniques of breaking rock by explosion have currently been developed when tunneling underground mine workings, but asymmetrically directed stress fields application is of the main interest. Research aim is to study explosion energy distribution and maximum concentration deep down the blasted rock mass. Blast energy concentration may be achieved by using the principle of cumulation in the hole back by means of changing the design of the blasthole explosive charge. Methodology. Based on the analyzed literature and theoretical research it is recommended to use the design of a blasthole explosive charge with the use of Munroe effect, which makes it possible to increase the blasthole efficiency ratio (BER), reduce drilling activity, reach sharper design contours of mine workings and eliminate bootlegs. The action of blasthole explosive charges with Munroe effect has been theoretically investigated, hydrodynamic theory of cumulation has been studied, and the dependences have been determined between the liner’s collapsing angle alternation and the radius of the cone, its height, initial velocity, and cumulative jet velocity. Results. The main factors which determine the efficiency of the proposed new technique of blasting against the basic technique are the blasthole efficiency ratio, face advance pace after one blast, the amount of rock mass detached after one blast, and the granulometric composition of the blasted rock mass. Summary. The developed design of the blasthole explosive charge with Munroe effect makes it possible to increase BER, face advance per one cycle, and increase the amount of the broken rock mass.

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