Powered roof support is equipped with a hydraulic control system to ensure its required load
capacity. The main problem arising from powered roof support during exploitation is …

This paper presents the results of lab-simulated tests on longwall powered supports under
dynamic loading conditions. The tests were carried out on a test site, where the tested prop …

The hydraulic system of a powered roof support performs two functions. The first function is
to control the powered roof support in the extraction wall. The second function is to protect …

The process of designing a longwall powered support is extremely complex and requires
many operations related to the creation of a complete machine. The powered support …

The mining and geological conditions in which coal mining is carried out are highly variable,
which results in dynamic rock manifestations. These include rock mass dynamic failure …

The article presents an estimate of human factor reliability in aircraft operation. The analysis
of human factor reliability to identify possible human errors and their impact is the systematic …

This scientific study deals with investigation of the heat of combustion and effective heat of
combustion of selected electrical cables. Two different electrical cables for rated voltage of …

Powered roof support in a longwall operation is designed to maintain a safe working area
and allow the immediate roof to fail and collapse behind the support. The powered supports …

The growing demand for mineral resources, including hard coal, requires the continuous
improvement and development of technologies to improve safety, productivity and …

This chapter deals with materials used in safety and security engineering. The most
commonly used materials in this field include shielding materials, materials for protective …