Shotcrete is a modern technology for protecting the excavations in solid rock masses and it is a process where the concrete mass is applied to the surface by means of high pressure. The installation of sprayed concrete requires special equipment, also a lot of attention and well-trained workers. For that purpose, quality controls are performed during each installation of the shotcrete. In order to ensure that the requirements are met, there is: small, normal and more extensive quality control. The frequency of the tests is determined depending on the concrete, the difficulties of installation, the type of the object, etc. Quality control is done before and after the installation of sprayed concrete. Thus, the test for the temperature of the concrete is done in every 100 m³, the thickness of the torque and the compressive strength are measured every 250 m³ of built-in sprayed concrete. However, the conditions prescribed by the project are not always met. Therefore, problems are possible when using this modern technology for protection of excavations. Such problems can occur in various stages, such as: during the preparation, during the installation and after the installation, as well as possible problems caused by the equipment and workers. To eliminate them or minimize them, attention should be paid to several key things, including the period of incorporation of the wet mixture. If the shotcreting is not completed within 2 hours, the hydration process begins, which complicates the work.