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Influence of remnant size on the geomechanical situation and safety in the mining field based on numerical modeling

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Title: Influence of remnant size on the geomechanical situation and safety in the mining field based on numerical modeling

Creator:

Adach-Pawelus, Karolina ; Pawelus, Daniel

Description:

Mining Science, Vol. 32, 2025, s. 47-63

Abstrakt:

Great problem associated with the Polish underground mining is doing the mining operations at an increasing depth in difficult geological and mining conditions, among others, in the area of remnant impact. The problem with remnants and its effect on the rock mass behavior is an important issue in the Polish underground hard coal mines and copper mines. The main goal of the paper is to investigate how the different sizes of remnants affect the geomechanical situation in the mining field. Numerical simula-tions were conducted for the case study of a mining field with a room and pillar mining system, where undisturbed remnants 10, 20, 40, 60, 100, and 200 m in width, were left behind. Results of numerical analysis demonstrate that the size of remnant has a great influence on the stress distribution and rock mass stability in the mining field. As the width of the remnant decreases, the values of vertical stress σy both inside the remnants and in its surroundings increase and reach very high values for narrow remnants. In contrast to the vertical stress y, the strength factor Sf decreases as the width of the remnant decreases. Simulations show also that leaving a large remnant in the form of a stabilizing pillar, improves the stabil-ity of the roof in the mining field but for remnants with high widths an unstable zone might be formed in the roof layers above the edge of the remnant at the goaf side which may cause sudden fracturing and collapse of rigid roof layers on the edge of the remnant. The results achieve in this paper can be utilized to enhance the safety and efficiency of underground mining.

Publisher:

Wroclaw University of Technology

Place of publication:

Date:

Resource Type:

Resource Identifier:

oai:dbc.wroc.pl:140062

Source:

click here to follow the link

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Relation:

Mining Science ; Mining Science, Vol. 32, 2025 ; Prace Naukowe Instytutu Gornictwa Politechniki Wroclawskiej ; Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii

Rights:

Pewne prawa zastrzeżone na rzecz Autorów i Wydawcy

Access Rights:

Dla wszystkich zgodnie z licencją

License:

CC BY-NC 3.0 ; click here to follow the link

Location:

Wroclaw University of Technology

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Subject and keywords:

mining geology geo-engineering

Object collections:

Last modified:

Sep 16, 2025

In our library since:

Sep 16, 2025

Number of object content hits:

13

All available object's versions:

https://dbc.wroc.pl/publication/178894

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Mining Science

Edition name	Date
Influence of remnant size on the geomechanical situation and safety in the mining field based on numerical modeling	Sep 16, 2025

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