60 / 2021-09-09 16:29:13

Optimization of selected parameters of the base of shield support dedicated for the condition of a weak floor

numerical modelling, PFC3D, weak floor, shield support, longwall exploitation

In longwall coal exploitation, problems with the proper functioning of the powered shield support often occur. In many cases it result from insufficient load-bearing capacity of the ground (floor) and the inability to achieve the set or yield pressure of the shield support. The improper functioning of the shield support may also result from its construction and the lack of optimization to work on a weak mine floor. This paper presents an attempt to optimize the working conditions of the base of a two-legged shield support on the basis of underground observations and results of numerical calculation in PFC3D. In the framework of the numerical calculations the impact of the width of the base and the location of the hydraulic legs on the working conditions of shield support on a weak floor were analyzed.

(artykuł do 4 nr Archiwum Górnictwa wydawanego w ramach V Sympozjum ISMSSE)