The proposed conceptual approach to the development of mineral resources of the North and North-East of Russia is a strategy of integrated subsoil development, based on natural and socio-eсonomic conditions, taking into account technical, technological and environmental factors of development. The main directions of research are formulated.
The history of creation and modern directions of scientific and educational work of the oldest educational institution in Russia, which played a significant role in the history of creation of the domestic mining industry, are considered.
Research on the problem of rock fracture in the Institute has peculiarities due to its educational nature and financing of scientific research by industrial enterprises.
A specific feature of potash mines is the need to maintain the continuity of the water protection zone (WPZ) rocks, which are being mined during mining operations.
Let n interpass healds of width a be left in the chamber of width L to support the roof. Let's find the minimum value of a ...
Mining engineer, Professor Dmitry F. Borisov for fourteen years, from 1954 to 1968 headed one of the leading departments of the Leningrad Mining Institute - the Department of Stratiform Deposit Development.
Mining of potash seams is complicated by sudden salt and gas outbursts. Such outbursts are observed in the USSR during the mining of the Verkhnekamsk and Starobinsk potash deposits.
Physical and mechanical properties of salt rocks were investigated in laboratory and underground conditions with respect to the problems of rock mechanics – calculation of rational parameters of room-and-pillar mining and identification of patterns of rock pressure manifestations. These tasks are of great importance in mining the Starobinsk potash deposit, represented by several potash seams, occurring at a depth of 420–640 m from the surface. At the deposit, two potash seams are mined with thicknesses of 1.8–4.0 m and 4.5–7.0 m, occurring respectively at depths of 420 and 580 m.
One of the most common measures to prevent sudden coal and gas outbursts in longwall faces of single outburst-prone flat seams, as well as for preparatory workings and opening of outburst-prone seams in the Donbass, is drilling of advance boreholes ...
After drilling a borehole in the coal seam, gas filtration from the coal begins in its immediate vicinity due to redistribution of gas pressure. In this case, the intensity of redistribution of gas pressure in the zone of influence of the borehole depends on the initial gas pressure in the seam, its filtration and sorption characteristics. ...
Sudden outbursts of coal and gas in working faces of single seams of Donetsk basin are currently prevented by drilling advance boreholes of large diameter. About 30% of faces of all outburst-hazardous seams of the central region of Donbass are developed with application of drilling advance boreholes as protective measures. The schemes of borehole location relative to the working face are different, and the spacing excludes outbursts. As is known, the mining pressure and the pressure of the gas contained in the coal are the main factors determining the occurrence and development of the outburst ...
One of the main ways to prevent sudden coal and gas emissions in longwall faces of single gently sloping seams is to weaken the coal mass with large-diameter advanced boreholes. These emissions in recent years in the mines of Donbass exceed 25% of all emissions. Despite the relevance of the method, until recently there has been no universally recognized methodology for determining the density of the protective network of wells. The radius of influence of wells is calculated according to the formulas of V. V. Khodot, A. V. Pavlov or according to the method of MacNII.
