Materiały konferencyjne SEP 2024

17 [5] Jendryś M. 2020: Przykład modelowania numerycznego górotworu i obudowy ŁPzm dla potrzeb jej doboru w określonych warunkach geologiczno-górniczych. Materiały Szkoły Eksploatacji Podziemnej, Kraków. [6] Jendryś M. 2023: Stateczność wyrobisk na dużych głębokościach w świetle symulacji numerycz- nych. Materiały Akademii Obudowy, Szczyrk. [7] Karlikowski S., Głuch P., Lekan W., Parzniewski T., Sądej T. 2018: Obudowa stalowo – kotwowo – betonowa w długotrwałych wyrobiskach kapitalnych na dużej głębokości w polu STEFANÓW LW „BOGDANKA”. Materiały Szkoły Eksploatacji Podziemnej, Kraków. Support of long-term mining excavations in the light of "in situ" tests - requirements and directions of development SUMMARY: Long-term mining excavations, which include main access excavations such as cross headings or trenches, should be characterized by stability and functionality throughout their entire period of use. The high variability of geological and mining conditions, as well as the insufficient identification of the parameters of the rock mass at the outskirts of these mining excavations, constitute a great difficulty at the stage of selecting the support structure to ensure the permanent stability of the excavations. The article presents the variability of rock mass pa- rameters over time and the extent of the fracture zone based on penetrometric and endoscopic examinations of the roof layers of two excavations providing access to the deposit at the level of 850 m, excavated in a flexible arch support in the years 2004 to 2008 of this century. In ad- dition, the requirements and directions for new support solutions for long-term excavations are presented in terms of using the bearing capacity of the rock mass to transfer loads - confine- ment of rock mass. KEYWORDS: mining, mining support, excavation stability