Theoretical Features of Rope Shovels and Hydraulic Backhoes Using at Open Pit Mines

In this article the rational value of overburden cut width and thickness of transportless overburden at mining of two dispersed flat seams IV-V and VI at Kureinsky section of Sibirginsky open pit mine are presented, which makes it possible to minimize the volume of rock re-excavation under the condition of the planned annual productivity of coal on the open pit and to ensure reduction of stripping costs. This task is complicated by the fact that the dip angle at the section is close to the limit on the condition of the possibility of spoiling of internal dump, and since the overburden rocks of the section are represented mainly by large-block sandstones on the clay cement and siltstones and their compressive strength is 60-80 MPa, then it is required to use a drilling and blasting method of their preparation for excavation. Under such conditions, optimizing the parameters of the transportless excavation scheme is of special importance for effective mining of the section.

Section: Methodsmentioning

confidence: 99%

Rational parameters of the transportless technological scheme for the development of strata with maximum permissible dip angle

Gvozdkova

Koščova

2021

“…A considerable number of works are devoted to the study of the parameters of transportless technology, in particular [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], where such issues as opening and excavation of stockpiled reserves, various cases for specific conditions, issues of drilling and blasting preparation of rock mass in the transportless zone, perspectives of technology using draglines and other issues are discussed. The technology of open-pit mining in the southern Kuzbass is not well-studied [16][17][18][19][20][21][22][23][24]. Below is a description and procedure for mining operations in the transportless zone of Krasnogorsky open-pit mine.…”

Section: Transportless Mining Technologymentioning

confidence: 99%

Some peculiarities of excavation of three flat seams strata using draglines

Fedotov

Litvin²,

Stukan

et al. 2021

One of the methods of increasing the efficiency of dragline operation is to optimize their work when mining the end sections of the cuts. This is especially important when the length of the work front is relatively short. With mining operations going deeper, and the complication of mining and geological conditions of bedding, it often becomes necessary to mine shorter face sections. However, as a rule, design bureaus do not take into account and do not visualize excavation of end sections, because these are, in fact, special cases of standard excavation schemes. Nevertheless, it significantly complicates the organization of mining operations due to the need to create routes for draglines to ascend and descend to the dump tiers. Scientific literature does not pay enough attention to this issue due to its complexity and the need for a full-scale field experiment, which in modern conditions is often very problematic. This article establishes the relevance of the above-mentioned issue and identifies directions for further research.

“…The solution of these problems should be based on the assessment of conditions for the occurrence of complex-structured coal deposits of Kuzbass. It is known [5][6][7][8][9][10][11][12] that the conditions of occurrence of deposits have a significant impact on the technology and efficiency of mineral extraction. The proposed systematization is based on the characteristic geometric features of the deposit.…”

Section: Introductionmentioning

confidence: 99%

On evaluation of complex-structured coal deposits based on their typical geometric features

Katsubin¹,

Martyanov

Grohol

2021

Information about the geological structure of Kuznetsky coal basin (Kuzbass) allows us to note that coal deposits developed by open-cast method are characterized by complicated conditions and have the following features: large length of deposits at significant depths of occurrence; coal series bedding of different thicknesses (from 1 to 40 m); different dip angles (from 3 to 90º); a significant number of dip and direction disturbances; different thickness of unconsolidated quaternary sediments (from 5 to 40 m); a wide range of strength values of rocks. In addition, there is a thickness irregularity and frequent variability of elements of occurrence of coal seams within the boundaries of a quarry field both in length and depth of mining. From the point of view of open-pit mining, such deposits are complex-structured. The factors listed above have a decisive influence on the choice of technical means, the order of development and the possibility of carrying out surface mining operations. Therefore, there is a need for a systematization of mining and geological conditions for the development of coal deposits, the purpose of which is to ensure a process of evaluation of complex-structured coal deposits for the development of coal-bearing zones by various complexes of equipment.