Abstract
Proposed a method for optimizing the parameters of drilling and blasting operations, considering the physical and technical properties of rocks within the blasted block, in order to improve the quality of the blasting quarries with a complex geological structure. Described the ground-penetrating radar method is with the application of the "Oko-2" series of the development of the group of companies "LOGIS-GEOTECH" with antenna blocks AB-90 with a depth of sounding up to 16 m. and a resolution of 0.5 m. in depth and AB-150 with a sounding depth of 12 m. and resolving ability of 0.35 m. in depth. The results of laboratory experiments carried out on blasting blocks with various strength properties are presented, confirming the improvement in the quality of crushing of rock samples by explosion of charges with variable decelerations and location, depending on the strength properties of the samples, relative to charge explosions with unchanged parameters. This will ensure a better crushing of the blasted rock mass.
Highlights
Blasting destruction of complex-structured rocks has a several of features related to the strength properties
The method of ground-penetrating of the surface layer with the use of ground-penetrating radars is suitable for the rapid assessment of the physics-technical properties of blasted blocks
Ground-penetrating radars (GPR) technologies can be used for detailed researching of complex structure arrays, as well as for determining the coordinates of bedding of rocks with different strength properties [1, 2]
Summary
Blasting destruction of complex-structured rocks has a several of features related to the strength properties. To optimize drilling and blasting operations of complexstructured rocks requires an assessment of the physical and engineering properties of rocks and the determination of the coordinates of their location with different strength properties inside the blocks. Ground-penetrating radars (GPR) technologies can be used for detailed researching of complex structure arrays, as well as for determining the coordinates of bedding of rocks with different strength properties [1, 2]. Since optimizing the parameters of drilling and blasting operations and selecting the necessary grid sizes for the location of charges and delay interval. It is known that solid rock characteristics affect the location of charges on the blast block and the delay interval. If the strength of explosive rocks decreases, according to existing recommendations, the explosions delay are increase, and the distances are decrease [3,4,5]
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