Vol 82

Professor Vladimir Dmitrievich Slesarev occupies an honorable place among such glorious figures of mining science, as Honored Professor R.I.Bokii, Academician A.A.Skochinsky, Professor M.M.Protodyakonov and others ...

In the practice of excavation of hollow coal seams by long-pillar mining systems, panel preparation is usually adopted. In this case the longwall face moves in the direction perpendicular to the drift ...

The technology of field development by systems with hardening backfill provides for replacement of the natural support of the overlying rock strata by an artificially erected in the mined-out space backfill mass ...

The work contains fundamental experimental studies of the strength and deformability of 23 types of rock, as well as gypsum, concrete, cement stone, and brick ...

In the development of ore deposits and stratum-shaped thick deposits in most cases are used chamber systems with multi-stage ore excavation, resulting in the formation of unconfined cavities of significant volumes ...

In the practice of open-pit mining, there are often situations in which the stable condition of a section of the ledge or pit wall must be maintained only for a certain, often very small period of time ...

Prospects for the development of coal seams at great depths are largely determined by how timely and effectively will be solved the issue of roof management in the cleaning faces for the specific conditions of deep horizons ...

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 ...

The combined (explosive-hydrodynamic) method of massif de-strengthening is developed by the employees of LMI with the participation of employees of the company Sakhalinugol and is used in the mining of formations with hard-to-collapse roofs ...

Optimal boundary conditions, determining the possibility of safe development of deposits under water bodies, is determined, first of all, by the safe depth of work, With some approximation for this mark in the excavation of deposits can be taken as the limit value of the height of the zone of development of fracturing, remembering, however, that the latter largely depends on the dialogic structure of rocks and roof management method ...

Mine and laboratory studies by the method of volumetric models established that the operation of the main roof is to some extent similar to the operation of thin slabs. In the general case, the main roof in the mode of its steady motion is a cantilever plate on an elastic base, which rests on the coal massif in front of the mine face and near-shot pillars ...

Constantly increasing requirements to the completeness of excavation of minerals, protection of subsoil and the environment puts the systems of development with hardened filling in a number of the most promising ...

The development of gentle and extended deposits by chamber systems with solidifying backfill in many cases is carried out by simultaneous excavation of the same name chambers in a group of blocks including two, four, six or more chambers ...

On the basis of studying the mechanism of formation of pressure cracks and roof movement within the unfixed part of the bottom-hole space and face faces of low-lying formations of Donbass it is established that the immediate roof should be considered as a system having a block structure ...

Of practical interest is the establishment by calculation of the dependence of the uniaxial compression strength on the stable parameters of strength and deformation properties of rocks and the size of samples ...

At development of deposits by chamber and chamber-pillar systems one of the actual problems is determination of stability of elements of systems of pillar - roof - soil (PRS) taking into account their external outlines, real structure and properties of the rocks composing them ...

When assessing the stability of underground mine workings in conditions of thermal effects caused by the depth of work or technological factors, it is necessary to preliminarily study the changes in physical and mechanical properties of the host rocks in the considered range of temperatures ...

The experience of using nuclear-geophysical methods of controlling the stressed state of the massif in solving the problems of mining production has allowed us to identify the main requirements to the measuring apparatus and equipment, non-fulfillment of which significantly limits the scope of radiometry ...

Application of electrometry to assess the stresses in the rock massif assumes as one of the stages of the study of the dependence of the electrical properties of the rock from its mechanical state ...

In underground mining, predicting the condition and behavior of the roof is of interest. One of the informative parameters of the roof condition is its sound conductivity ...

When carrying out instrumental observations of the manifestation of rock pressure and deviceability of underground structures of large cross-section, the task of remote measurements of deformations in hard-to-reach places arises ...

The development of layered rock salt deposits from the surface by in-situ leaching through wells has led to the creation of a chamber-storey system, in which leaching chambers are located one above the other and separated by inter-storey ceilings ...

Chamber mining systems with strip pillars are widely used in potash ore mining. Targets are the most important elements that determine both the necessary safety of mining operations and their technology ...

One of the main factors of salt and gas emission hazard is gas. As established in the work, this applies to emissions from the zones of local geological disturbances encountered in the mining of the third potash horizon of the Starobinsky deposit ....

In the 70's of the XX century at domestic and foreign enterprises developing deposits of valuable and rare metals, began to be widely implemented system of development of horizontal or slightly inclined layers in descending order with the use of solidifying filling ...