Based on the description of the commercial test results, it is shown that the turbo-blasting with linear priming of granular explosive charges allows resetting the blasting-raised bench bottom to the design position within a single cycle of drilling-and-blasting and with the decreased powder factor.

Short-delay blasting excites the Rayleigh waves over the surface of open pit walls. The author shows that interference of these waves generates an extended neutral seismicity zone behind the first positive halfwave in the distribution diagram of the transverse component of the velocity vector. The neutral seismicity zone ends with the low amplitude interference vibrations with a velocity comparable with the air sonic velocity.

Large-scale blasting induces Rayleigh waves. It is possible to make these waves interfere and to form their crest by choosing a proper range of blast delays. The positive half-wave propagation over a projected loosening zone of every next detonated shot hole will generate tensile stresses, which will enhance blasting effect.

The paper demonstrates that massive blasting at open pits with using the nonelectric initiation system SINV (analog of Nonel) generates free surfaces where the Rayleigh waves arise, that improve loosening of the shattered rock mass.

The author describes the construction of an explosion booster composed of a waveguide and a membrane. The booster is placed at the bottom of a blast hole and is initiated by detonation wave. Experimental underground tests of explosion boosters showed the qualitative ore blasting results, in particular, with fan-patterned blast hole drilling.

The highlight of the paper is the potentiality of resource conservation and mitigation of ecological impact after blasting at open pit mines by application of the forced convection of detonation products in a hole, It is expounded how to drive the forced convection of gas-dispersion detonation products, as well as a convector and the designs of various charges to be used in the open pit mining are described. The prime elements of the turboblasting technology are described, and its case history is presented, backed by the actual data on the existent resource-saving and nature-oriented pay-off of the technology application at ore and nonmetallic quarries and coal open pits in Russia.

The results are presented for stand testing of processes that take place in charging holes by cartridges of hydrolabile explosives with permeating and insulating covers. Parameters of hole capacity, water level rise at charging, contact ratio for water and charge column, no-break term for hole charging are determined, and costs of blasting are estimated. Based on commercial test data, a conclusion is drawn on expediency of turbo-blasting of charges with smaller diameter in flooded sections of a rock massif.

The causes of changing temperature of gaseous energy-carrier under explosive loosening of a rock mass are considered. An equation is proposed to calculate the temperature of detonation products in a state of relaxation.

A calculation is presented for the charge construction that makes open pit blasting proceed without stemming going-off and dust-gas cloud outburst through borehole mouth.

It is experimentally shown that additional energy is released during turbo-blasting. It is required to reduce the specific explosive consumption and the volumes of drilling in order to transform this energy to efficiency.

An expanded representation is given for the law of pulse conservation with transition through a shock front taking account of the thermal component of pressure. Equations of state for detonation products in the vicinity of the Chapman-Jouguet plane differ in the longitudinal and transverse directions. Equilateral pressure is established during their expansion by a factor of 2.5, but flow movement ceases in the case of three-fold expansion.

The detonation of individual solid explosives of C a H b O c N d type is described by introducing the concept of a nonthermal potential as the sum of several types of energy—chemical energy, elastic compression, the electron state of the molecules, and the kinetic energy of the flux. Graphs of the variation in the nonthermal potential and the internal energy of the substance, the kinetic energy of the flux, and the pressure in the head region of the detonation wave right up to the Chapman-Jouguet plane are plotted. The relations between the various types of works performed at the shock front are calculated.

Coefficients that characterize the relative compression of the substance in the CJ plane and on the shock front of the detonation wave are found by means of Eqs. (8).

A method is proposed for self-propagating high-temperature synthesis of binary and ternary phosphide phases (synthesis in the combustion regime). Designs of three laboratory installations for the synthesis are described. Examples of metal phosphide synthesis are given.

A method is described for preparing Cu3P powder by low-temperature reaction sintering from a mixture of the elements. According to thermal analysis data the phosphide forms at ∼470° K; particles of it assume the shape and size of the original copper powder. It is established that formability depends on the hardness and plasticity of particles rather than powder shaper and bulk density.

A method is described for preparing Cu3P powder by low-temperature reaction sintering from a mixture of the elements. According to thermal analysis data the phosphide forms at approximately 470 K; particles of it assume the shape and size of the original copper powder. It is established that formability depends on the hardness and plasticity of particles rather than powder shaper and bulk density.