Mechanisms of mining equipment machines that experience abrasive and impact wear during operation fail prematurely. Wear of working surfaces necessitates their restoration. Therefore, the development of materials that significantly increase the wear resistance of such parts and the use of technology for their restoration is an important task. The most promising is the use of flux-cored wire surfacing on the wearing surfaces of parts. For these purposes, special flux-cored surfacing wires are being developed and manufactured in our country and abroad. Due to the optimally selected alloying method, the deposited coatings have high values ​​of hardness, abrasive and impact-abrasive wear resistance. Surfacing wires of the Fe–C–Si–Mn–Cr–Ni–Mo systems of type A and B according to the MIS classification are widely used for surfacing abrasive-wearing products. Currently, in our country, powder wires of such a system from the company DRATEC (Germany) of the DT-SG 600 F brand and powder wires from the company ESAB of the OK Tubrodur 15.52, OK Tubrodur 58 O/G M brands are widely used.

Preparatory workings provide for the preparation of individual parts of the mine field and the development of extraction pillars. In order to accommodate a significant amount of equipment, ensure uninterrupted operation of transport and allow a large amount of air to pass through, it is necessary that the cross-section of the preparatory workings meet the requirements of the Safety Rules. At the same time, in order to maintain the cross-sectional area, permissible gaps between the walls of the working and transport during operation, it is necessary to use reliable security methods. In the mines of the Kuznetsk Basin, coal pillars are used to protect the extraction workings adjacent to the longwall; as a rule, they are left at the junction of the longwall and the working. Pillarless technology for the preparation and development of extraction pillars accounts for about 30%.

One of the methods of structural synthesis of kinetic chains widely known in the theory of mechanisms is the method of M. Grubler , developed and published in 1883. The Russian translation of Grubler's work was carried out in 2011. This method has been used in the practice of designing machines for more than a hundred years, but the ideas laid down by Grubler in his method have not yet been fully studied and used. In this paper, an attempt is made to take a systematic approach to the problem of constructing Grubler chains with translational kinematic pairs.

Dynamic processes in continuous rolling mills are usually determined by the nature of technological loads in the rolling transition zones. In the future, these processes extend to a significant part of the stable sections of the technological process, thereby creating additional loads on the drive elements of the machines. The behavior of the strip at the moment when the metal fills the deformation site of the rolling mill is determined by the ratio of the speeds of the strip and the rolls being rolled, the shape of the front end of the strip, and the influence of neighboring cells- tey. In this work , dynamic and mathematical models of the behavior of a group of crates have been developed, taking into account the peculiarities of the work of the roughing group of rolling crates of a continuous-billet mill.

The issue of solving the housing problem in the country is one of the most important and always relevant. There are State programs for providing housing to the population, and similar program documents are being adopted in various regions and cities of Russia. In order to solve the tasks set, it is not necessary to use the opportunities of the construction industry only in terms of building new housing. The country's existing housing stock is quite high, but it does not meet the ever-growing demands of the people living in it. It is established that the requirements for housing change every 7-8 years.Considering that over the past 20-25 years, existing buildings have been subjected to almost only cosmetic or emergency repairs, the state of modern housing as a whole can be assessed as not entirely satisfactory.

The durability of mass construction is limited in time, its final service life is 10, 50, 100… years. This is the time during which maintenance and repair are economically feasible. Bridges (up to 200 years) and tunnels (up to 500 years) have the longest service life. This paper will discuss the durability of various types of buildings, including residential ones.

Among spatial structures, a special place is occupied by domed structures or cupolas. These are some of the most ancient spatial roofing systems. The first attempts to create curved roofs - domes - were made in Ancient Rome. Such roofs were used in Mesopotamia, Syria, Iran. The main materials of natural origin used for the construction of domes were stone and wood. However, the span covered by the dome was smaller than now, and the shell was thicker. Until recently, domes were mainly used as an option for completing a religious building, but with the advent of new materials (reinforced concrete, various plastics), as well as the competent use of long-known materials such as wood or stone, domed structures are gaining popularity. In the twentieth century, significant contributions to the construction and use of dome structures were made by Lederer, Makovsky, Otto Wright, Buckminster Fuller, M.S. Tupolev, M.E. Lipnitsky, V.A. Savelyev.

The strategy of comprehensive modernization of the country adopted in Russia requires the formation of a new socio-psychological type of person, ready and capable of change. The functions of training and forming a new person can be assumed by the system of additional education in the broadest sense of the term, which should teach the skills to navigate the vast space of information, process it, structure it, master and apply it in activities. Additional education can be divided into two stages. The first stage is the additional education of high school students, the purpose of which is to choose the right future profession. The second stage is additional professional education, the role of which increases with the transition of higher education to a two–tier system (bachelor - master), which will require the creation of a system for effectively educating bachelors to the level of specialists capable of working in modern production. In order to ensure the second stage of additional education, it is necessary to properly organize the sphere of additional school education, that is, the first stage.

In Russia, over 5 billion tons of waste are generated annually (in 2014 – 5.17 billion tons; in 2015 – 5.06 billion tons) [1, 2]. The generation of municipal solid waste (MSW) in Russia is estimated at 67.4 million tons, which is an insignificant share (1.3%) of the total waste volume. Thus, about 99% is production waste, which is often called man-made.

Currently, metallurgy is facing urgent issues of saving energy, raw materials and supplies. The problem of using man‒made raw materials - waste from own production, a significant part of which is metallurgical slags, has also fully matured, especially since more than half of the raw materials consumed in metallurgy are turned into waste.

Coking chemical enterprises (KHPS) in Russia are characterized by an unfavorable environmental situation, specific emissions into the atmosphere range from 3 to 15 kg/ton of produced coke. Gaseous emissions of coke chemicals are characterized by dustiness, significant volumes of exhaust gases, numerous sources, a variety of pollutants, the presence of polycyclic aromatic hydrocarbons (PAHs), including carcinogenic substances (in particular, benz[a]pyrene).Coking chemical enterprises (KHPS) in Russia are characterized by an unfavorable environmental situation, specific emissions into the atmosphere range from 3 to 15 kg/ton of produced coke.

One of the main challenges to modern society on a global scale is the possibility of global warming. And almost unanimously, everyone determines the reason for this to be the "greenhouse effect", which occurs due to the ability of some gases in the atmosphere to absorb waves of the infrared part of the solar spectrum, which transfers the energy of thermal radiation.

March 4, 2017 marked the 65th anniversary of the birth and 40 years of scientific and pedagogical activity of the famous scientist in the field of metallurgy and chemical technology, Honored Scientist of the Russian Federation, Doctor of Technical Sciences, Professor Gennady Vladislavovich Galevsky.

On April 26, 2017, Professor, Head of the Department of Metal Forming and Metal Science. EVRAZ ZSMK, Honorary Worker of Higher Professional Education of the Russian Federation Andrey Rostislavovich Fastykovsky turned 65 years old.