scholarly journals Stabilization of Gob-Side Entry with an Artificial Side for Sustaining Mining Work

2016 ◽  
Vol 8 (7) ◽  
pp. 627 ◽  
Author(s):  
Hong-sheng Wang ◽  
Dong-sheng Zhang ◽  
Lang Liu ◽  
Wei-bin Guo ◽  
Gang-wei Fan ◽  
...  
Keyword(s):  
Mining Work

Management of the Mining Work Environment

2018 ◽  
pp. 103-127
Author(s):  
Joel Lööw ◽  
Bo Johansson ◽  
Eira Andersson ◽  
Jan Johansson
Keyword(s):  
Work Environment ◽  
Mining Work

scholarly journals Determination and quality classification of rock mass of the Diatomite mine, Algeria

2021 ◽  
Vol 1 ◽  
pp. 17-24
Author(s):  
Abdessattar LAMAMRA ◽  
◽  
Dmitriy Leonidovich NEGURITSA ◽  
Samir BEDR ◽  
Ariant A. REKA ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rock Mass ◽  
Underground Mining ◽  
Physical And Mechanical Properties ◽  
Friction Angle ◽  
Classification Systems ◽  
Natural Phenomenon ◽  
Underground Structures ◽  
Dilatancy Angle ◽  
Mining Work

Reserch relaevance. Most ground movements are generally due to rock instability, this natural phenomenon poses a risk to humanity. The properties of the rock mass directly influence the type of movement especially in underground structures. Research aim. Our goal is to characterize and classify the rock mass of diatomite from the sig mine using geomechanical classification systems such as the RQD and RMR in order to determine the quality of the rocks in the sig mine Western Algeria from the determination of the physical and mechanical properties. Methodology. In this article, the characterization analysis of the diatomite rock mass of the sig mine was carried out. First, determinations of the physical properties and carried out the triaxial test to determine the mechanical properties (young’s modulus, the friction angle, the dilatancy angle, the cohesion, the poisson’s ratio). Secondly to classify the deposit and give a recommendation to avoid stability problems. Research results. The results from physical and mechanical analyzes, it can be said that the nature of the rock present in the diatomite (underground mine) does not have enough resistance. Conclusion. Our study definitively proves that the rock mass of sig diatomite is of very low quality and it will be very dangerous for the underground mining work of the mine especially in places where the mineralized layer is very deep. And we suggest to replace the mining technique room and pillar currently used in the diatomite mine and put another mining method which includes roof support system to ensure the safety both of the miners and the equipment.

Update of the Ventilation Network Related to Livezeni Mine

Mining Revue ◽  
2021 ◽  
Vol 27 (2) ◽  
pp. 1-5
Author(s):  
Eva Biro ◽  
Sorin Mihai Radu ◽  
Doru Cioclea ◽  
Ion Gherghe
Keyword(s):  
Underground Mining ◽  
Ventilation Network ◽  
International Level ◽  
Mineral Substances ◽  
Air Flows ◽  
Mining Works ◽  
Mining Work ◽  
Over Time ◽  
Ventilation Networks

Abstract The ventilation networks are associated with the set of underground mining works used for the extraction of useful mineral substances. Over time, the ventilation networks involve a change in the structure due to either the expansion or restriction of the mining works structure. For the establishment of air flows at the level of each active mining work, specialized programs are used at international level. These programs allow the modelling and solving of complex ventilation networks. The most advanced specialized programs are those from the VENTSIM range. The paper presents the updating of the ventilation network related to Livezeni mine, with the help of the VENTSIM program.

Distribution of Underground Pressure Law and Fracture Zone Prediction Research of Overburden in Steep and Multiple Coal Seams Mining

2013 ◽  
Vol 448-453 ◽  
pp. 3888-3892
Author(s):  
Ke Min Wei ◽  
Mao Sen Zhao ◽  
Ze Kang Wen ◽  
You Ling Fang
Keyword(s):  
Stress Concentration ◽  
Coal Mining ◽  
Fracture Zone ◽  
Coal Pillar ◽  
Steep Seam ◽  
Coal Seams ◽  
Level 1 ◽  
Mining Work ◽  
Seam Mining ◽  
Protection Pillar

Use Taiping coal mines second horizontal (+1100m~+900 m level ) 1#, 3# and 5# coal seam in Panzhihua Baoding as the research object, apply the problem solving nonlinear large deformation finite difference method (FLAC), to research the steep multi-seam mining of pressure distribution and characteristics of fracture zone. The results show that: (1)During the course of three coal mining extraction, the stress of goaf surrounding rocks will be changed. (2)When the nearby coal is mining, the coal pillar come into being stress concentration near the area. when the mining work continues, the goaf will have an effect on the protection pillar, which is similar to the "liberate". the effect of coal pillar and stress concentration nearby will be eased; (3)After the coal mining, plastic failure has occurred over the protection pillar, forming a water guide channel. Research results can be as a reference for similar steep seam mining.

Investigation and design of explosion-boring assemblies for mining work

1981 ◽  
Vol 17 (4) ◽  
pp. 342-345
Author(s):  
V. F. Gorbunov
Keyword(s):  
Mining Work

Research on Influence of Loose Coverage Rock Fragment Distribution

2013 ◽  
Vol 405-408 ◽  
pp. 322-325
Author(s):  
Guo Jian Zhang ◽  
De Zhong Wang ◽  
Zhi Qiang Zhang
Keyword(s):  
Physical Simulation ◽  
Underground Mines ◽  
Rock Fragment ◽  
Mining Method ◽  
Rock Powder ◽  
Mining Depth ◽  
Sublevel Caving ◽  
Long Time ◽  
Fragment Distribution ◽  
Mining Work

The sublevel caving mining method is widely applied in China's underground mines, in particular of iron mines. Its mining work is under the protection of loose coverage rock. The loose coverage rock is located in the stope for a long time, and its frequently squeezed from production blasting, impact effect and the colliding and breaking in the falling process, it comes into being a large number of powder and small pieces of rocks. The rock powder and small fragments have such characteristics-good mobility and strong permeability. With the increasement of mining depth, the rock powder and small fragments in the loose coverage rock will be earlier to reach the ores than the big fragments of the same level. As a result, ore dilution will prematurely appear. To better know the phenomenon, this paper explores ore dilution of different fragment distribution of loose coverage rock by physical simulation experimental method. The research results have certain guiding significance for the actual production of underground mines.

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