The study of the collapse zone by remote methods

Dolgikh, Oleksandr; Dolgikh, Liubov

doi:10.1051/e3sconf/202016603002

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…A scraper entry is driven from the ventilation and manway orts in the footwall. 5-7 m high drawpoints go out of the scraper entry [55][56][57][58].…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

et al. 2021

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When mining ore bodies in Kryvyi Rih iron ore basin, underground mines apply open stoping or bulk caving systems in proportion of 55% to 45%. Most of underground mines prefer stoping with pillar caving. Yet, rock pressure contributes to growth of costs for workings maintenance and deterioration of extraction indices. Rock mass extraction indices can be enhanced by application of a protectve structure in the upper part of the block that will enable additional decrease in load on the draw level. There are a great many of methods for determining parameters of constructive elements of the protective structure that help keep its integrity for the whole period of block mining. The article suggests methods for determining parameters of the protective structure when mining steep ore bodies. The research conducted demonstrates that with the inclined protective structure, increase of unit load on it from 200 to 1200t/m2 leads to decrease of its thickness from 6.3-20.9m to 5.5-18.4m and increase of the crown length from 40m to 60m. The developed block caving system with application of the protective structure when mining steep ore bodies enables overall decrease of ore dilution in the block by 3%, increase of iron content in the mined ore by 1.3% without significant mining costs growth and decrease of loads on the workings of the receiving level.

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“…A scraper entry is driven from the ventilation and manway orts in the footwall. 5-7 m high drawpoints go out of the scraper entry [55][56][57][58].…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

et al. 2021

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“…Due to their instability, large hang-ups and rockfalls are possible. The ores do not tend to stick or drift, they are not rock-bump hazardous, cavities are not expected [15,[57][58][59].…”

Section: Resultsmentioning

confidence: 99%

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

Stupnik

Kalinichenko

et al. 2021

E3S Web Conf.

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The work analyzes current technologies of ore mining applying self-propelled equipment in underground conditions; studies practices of using the equipment in general and for broken ore transportation only; considers performance of mining enterprises in similar mining-geological and miningtechnical conditions; analyzes and generalizes causes of high ore loss and dilution rates in underground mining in Kryvyi Rih iron ore basin, thus revealing a problem of providing high efficiency and increased ore extraction with minimal quality deterioration. Marketable ore production is affected by decreased quality and high broken ore losses. Incomplete balance ore extraction when breaking and drawing ore from the stope results in deterioration of mining indices. Ore dilution with waste rocks leads to decreased ore content in the mined mass as compared with that in the ore massif. The research enables development and substantiation of the rational technology of ore drawing and transportation as well as designing a new structure of the loading face to ensure increase of the drawn ore quality indices.

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“…It is shown in [30,31] that it is expedient to study the areas deformations where the deformations are from 50 to 100 mm and more by the method of ground stereotopographic survey. But the method of ground stereotopographic survey considered earlier by the authors has a number of disadvantages, which consist in the mandatory presence of identification marks and in the need to fulfill the requirements their layout.…”

Section: The Joint Use Of a Digital Camera And A Gnss Receivermentioning

confidence: 99%

The use of the construction with a digital camera and GPS receiver while researching dangerous areas

Dolgikh

Ielezov³

et al. 2021

E3S Web Conf.

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The purpose of the study is to select an effective methods and equipment for observing deformations in dangerous areas of the terrain, such as areas that are undermined by underground mining. It is known that the topical task of the mine surveying service is to improve remote sensing methods for the state of movement zones with craters, dips, cracks. The research methodology is based on the results of the performed analysis of methods for observing deformations using modern devices and technologies, and experimental work using the developed methodology, which provides for the combined use of digital methods and GPS technologies. Experimental work was carried out at the facilities of the Ordzhonikidze mine using various remote sensing methods, including those developed by the authors. The research used a design consisting of a digital camera and a GPS receiver. The performed analysis of the obtained survey results, using the proposed design of two devices, has shown its effectiveness in remote methods of observing the objects deformations located in areas undermined by mining operations. The scientific novelty of the results obtained lies in the methods development for remote observation of deformations of the ground's surface and objects, based on the structure use from a digital camera and a GPS receiver. This method was developed to increase the efficiency of performing research on objects deformations located in places that are dangerous for finding a person. The efficiency of using terrestrial digital stereo survey when the coordinates of the photographing points are determined with the help of GPS has been proved. The practical significance of the study lies in increasing work efficiency the on monitoring deformations of the earth's surface, buildings and structures located in areas dangerous for field work by traditional methods, which are performed using leveling and measuring the distances between the benchmarks of profile lines, which are usually used on areas undermined by underground mining. The use of terrestrial digital stereo photography with the coordination of photographing stations using GPS allows remote determination of the spatial position of the observed points with the required accuracy. Key words: ground stereoscopic survey, collapse zone, digital camera, GPS.

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The study of the collapse zone by remote methods

Cited by 8 publications

References 8 publications

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

The use of the construction with a digital camera and GPS receiver while researching dangerous areas

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