Browsing by Subject "support design"

Now showing 1 - 3 of 3

Access status: Open Access ,
Porównanie metod normatywnych projektowania obudowy stalowej łukowej podatnej stosowanej w podziemnych zakładach górniczych
(Wydawnictwa AGH, 2009) Wichur, Andrzej; Frydrych, Kornel; Bober, Maciej
The steel arch support is recognized as the most useful type of structure for the protection of underground excavations. This paper presents results of comparative analysis of the three standard methods of designing and selection of steel arch support. For each of method were counted 81 sets of data. The bar charts of load and set span were prepared according to calculation results. From the analysis comes out that the third method has the widest application from three of compared ones. Using this method is possible to select the steel arch support for the excavations and junction and crossings of working as well. Differences between the results of the each method result from lack of the knowledge about rockmass effects around of designed working.
Access status: Open Access ,
Strata control in underground tunnels - perspectives for development
(Wydawnictwa AGH, 2005) Majcherczyk, Tadeusz; Małkowski, Piotr
The paper constitutes a review of support systems of underground tunnels used in Polish coal mines. Taking the tendency to rationalise costs of tunnel drivage into consideration, new directions of strata control development are suggested, especially in terms of increasing spacing between support units and their reinforcement. The authors wrap up the discourse with their conclusions as well as share their experiences gained from monitoring interaction between support and rock mass.
Access status: Open Access ,
Zagadnienia projektowania obudowy długotrwałych wyrobisk podziemnych
(Wydawnictwa AGH, 2009) Wichur, Andrzej
Underground construction in Poland underwent a rapid development over the period of prosperity in mining and the worsening geological-mining conditions became the incentive to create new constructions of support. A particular role was taken by long-term excavations' support and lining (shafts, crosscuts, chambers etc.). The paper constitutes the review of base achievements in this field. The types of the support and lining presented and the methods for their calculations were the results of many years of research and practical experiments. Many calculation models were used in the design process. The designing practice related allow to use these in statical calculations of other underground structures, like communication tunnels, hydroengineering objects etc.