Moscow State Mining University

When processing roads and sidewalks, safety and labor protection requirements are often violated. There is a constant excess of the concentration of anti-icing reagents (AGR), the components of which at maximum concentrations adversely affect the human body. In particular, blood parameters, as well as the most important organs, such as the liver and kidneys, are affected. The concentration of AGR per unit area determines the intensity of the harmful effects of substances on the human body. The penetration of harmful substances into the human body occurs by airborne droplets or skin-resorptive action and depends on the method of distribution of AGR and the level of mechanization. The probabilities of the occurrence of a dangerous event when working with AGR, its severity and risk level are determined. Recommendations are given for employees involved in the treatment of residential and public areas with anti-icing materials.

As a result of thermal expansion of the gas phase of a foam mass playing the role of compacting component in a closed volume, we observe the appearance of excess internal pressure accompanied by the formation of the fields of pressure, temperature, and moisture content. The partial flows of liquid caused by these fields are directed from the center toward the perforated walls of the form and go further leaving the form. Under the action of electrohydrothermal force fields, we observe the appearance of three partial flows of moisture combined into a single flow in the mass. Thus, the phenomenon of self-compaction is accompanied by the processes of heat and mass transfer. At low temperatures, moisture moves in the material in the form of a fluid. At the same time, at high temperatures, it has the form of vapor. The density of the total flow of moisture can be represented as the sum of densities of the partial flows. The analytic investigation of the mechanism of heat-and-mass transfer flows enables us to study the behavior of the foam mass in the course of heat-and-force treatment and to choose the best conditions for this treatment.

An effective way to reduce unit costs of stripping work is to improve the transport scheme and a pit overburden removal method. This is especially important for motor transport. Transport expenses dominate in the cost structure of overburden removal production processes and can reach up to 60% of the total costs.

There are studied ecological and geological conditions of the north-eastern part of Shchekino region (the Tula province), which are characterized by high levels of environmental pollution. Four ecological-geological systems (EGS) are allocated; ecological-geochemical map is made up.

A procedure and results of monitoring of the technical condition of a monolithic reinforced-concrete “diaphragm wall” after seven years of conservation are described. Correspondence is confirmed between the physical and design parameters of the diaphragm. Lack of disruptions in the continuity in the construction of the diaphragm is established from data of multi-channel seismoacoustic measurements. The actual depth of the lower surface of the diaphragm is determined with use of results of speed-of-sound measurements in concrete specimens removed from the diaphragm. The strength class of the concrete placed in the “diaphragm wall” is evaluated. It is established that the strength of the concrete has not diminished below the design level (V30) after completion of construction.

The offered calculation procedure for the permissible output of a breakage face by gas factor is based on the equation of methane emission in the breakage face area from coal and roof and floor rocks. The model includes permeability and absorption of coal, porosity and thickness of coal seam, breakage face length, methane pressure and the operational safety-permitted methane concentration in the return ventilation air. The model implementation will help in validation of scheduled output of breakage faces in coal mines.

The calculation of the energy possibility of the transfer of spherical bubble A into adhered bubble M or the A → M transition (AMT) shows how large the influence of the capillary pressure (Pc) on the results of calculation is and how, as bubbles A and M diminish and Pc in them increases, the range of the possible variation of PcM in bubble M abruptly narrows. The influence of PcM on the energy barrier on the path to the adherence of the bubble to a hydrophilic surface drops almost to zero, but the preference to the adherence of the bubbles to a hydrophobic surface is retained, although the difference noticeably decreases compared with large bubbles. The data of the practice of the first processes of froth flotation by microbubbles are the confirming experimental base of the results of this precision calculation. A decrease in wetting angle θM to 0.02° and the beginning increase in the spreading coefficient of the adhered bubble over the substrate particle apparently also promotes the adherence process in practice.

The entangled photons components are found to be created in the lossless nanocavity with resonance mode. The smallness of Γ ( 0 ≤ Γ<< g- coupling constant for electro-dipolar interaction) was revealed playing the crucial part in their production. It's known that Г determines limits (ω_c ± Γ) of photon frequency deflection from the mode frequency ω_c, when photon passes through empty cavity. When Γ = 0 and ω_a=ω_c , the Hamiltonian is time independent and has two eigenstates with eigenvalies (ω_a ± g). Each state is superposition of the upper and lower atomic states, taken with signs plus and minus respectively. These states are stationary and form a time-depended superposition. Matrix elements of the interaction Hamiltonian, taken between that superposition and atomic unperturbed states, contain two anti-phases components of entangled photons. Since Γ = 0, their emission out of cavity is forbidden so they interfere, producing beatings of the resonance mode by sin (g•t). When 0 < Γ<< g those beatings become quasi-stationary, and with probability proportional to Γ/4g they go out through the partly transparent mirror and disintegrate into two photons, each of them taking its own spectral place outside the cavity. This process is illustrated by 3D-plots in the (ω, t)-space.

In the paper some candidate solutions of a problem of a decrease of energy consumption in civil buildings were reviewed. The features of implementation of measures on the engineering equipment for smart house were shown.