<p>The possibility of rapidly assessing the uniaxial compressive strength of rock directly at industrial sites using samples of arbitrary shape and size is considered. The necessity of using non-destructive methods is substantiated, as the relationship between the informative parameter and strength is weakly dependent on the rock type when these methods are applied. Direct uniaxial compression strength tests were conducted under laboratory conditions on regular-shaped samples for a group of rocks. The strength of the rocks ranged from 19 to 113 MPa. For this group of rocks, two non-destructive testing methods were also used on samples of arbitrary shape: ultrasonic and impact pulse. For the ultrasonic method, the optimal operating frequency and the appropriate testing range were experimentally determined. For the studied set of rocks, with the exception of coal, a relationship close to linear was established between the longitudinal wave velocity and the uniaxial compressive strength. For the rapid determination of rock strength under industrial conditions, portable, domestically manufactured ultrasonic equipment is recommended. In the developed version of the shock pulse method, the duration of the elastic interaction between the spherical impactor and the rock serves as the informative parameter. An advantage of the method is the weak dependence of this informative parameter on the impact force. It has been established that the relationship between the value of this parameter and rock strength under uniaxial compression is also satisfactorily described by a linear function. Coal is also an exception to this established relationship. Both methods can be used for rapid assessment of the strength of rock samples of arbitrary shape, as well as for an approximate assessment of strength directly in the rock mass under appropriate measurement conditions. The recommended equipment cannot be used in mines and other underground structures where there is a risk of gas or dust.</p>