Underground monitoring as the best way of roadways support design validation in a long time period

Małkowski, Piotr; Niedbalski, Zbigniew; Majcherczyk, T.; Bednarek, Łukasz

doi:10.33271/mining14.03.001

Cited by 39 publications

(27 citation statements)

References 24 publications

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“…To test the effect of roadway support and observe the deformation law of surrounding rock during roadway expansion and repair, the support design is scientifically validated [36,38,39]. Figure 5 shows F22 mm L = 6300 mm spacing 1800 mm F22 mm L = 4300 mm spacing 1800 mm F22 mm L = 2400 mm spacing 900 mm anchor cable hydraulic mop anchor cable rock cable royalsocietypublishing.org/journal/rsos R. Soc.…”

Section: Monitoring Methodsmentioning

confidence: 99%

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Investigation of the evolution and control of fractures in surrounding rock under different pressure relief and support measures in mine roadways prone to rockburst events

Gao

et al. 2021

R. Soc. open sci.

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This paper studies the evolution and control of surrounding rock under different pressure relief support conditions in mine roadways in which rockburst events have occurred. The evolution of fractures in the surrounding rock was determined from borehole images obtained with a digital panoramic borehole camera, and the surface displacement due to the rockburst events in the mine roadway was measured. According to the existing problems of the original support system of the roadway, a new coupled support system to prevent rockburst events in mine roadways was proposed, resolving both the pressure relief and support of the roadway. Field measurements indicate that the effect on the roadway under the coupled method of pressure relief and support was more satisfactory than that under the original support system. With the coupled support method, the surface displacement of the roadway was approximately 0.6 m, fractures were distributed only in the soft structures and bolt anchorage areas, and the maximum depth of the fractures was 2.95 m. By contrast, under the original support system, fractures were distributed throughout the roadway surrounding rock, and the maximum depth of fractures was 6.75 m. This coupled roadway support technology of pressure relief and support effectively maintains the stability of the rock surrounding the roadway and ensures the safety of the working face. The research results can provide a reference for damage prevention and support of mine roadways prone to rockburst events.

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Section: Monitoring Methodsmentioning

confidence: 99%

Section: Countermeasures For the Prevention And Control Of Typical Mines Prone To Rockburstmentioning

confidence: 99%

Investigation of the evolution and control of fractures in surrounding rock under different pressure relief and support measures in mine roadways prone to rockburst events

Gao

et al. 2021

R. Soc. open sci.

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“…At all times, progress of human civilization has been followed by the increased production and consumption of power resources. According to the technological improvement, that makes us search for solution for all the mining-accompanied problems along with the solution of economic, ecological, and social issues [22,32,33].…”

Section: Development Of Joint Technologies For the Geoenergy Usage Based On Gas Hydrates Transformationmentioning

confidence: 99%

Gas hydrates technologies in the joint concept of geoenergy usage

et al. 2021

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The paper represents the analysis, which has helped to establish the usage of gas hydrate technologies in the methane conversion. This gas could be obtained in different ways. Possibilities and sources for the gas obtaining have been demonstrated. Use of other environmentally friendly sources to support operation in such systems in terms of joint energy complex has been considered. The necessary kinetic connections to provide operational sustainability of all the constituents have been given. The approach helps evaluate quantitatively the priority of its physicochemical transformations to obtain gas hydrates artificially. It is possible to transport methane at considerable distances when it is solidified. Actually, in this case there is no necessity to build costly compressor stations and pipelines for its transportation to consumers. The approach is extremely important for mining regions as it helps prolong the operating period and working out of the abandoned and off-balance coal reserves. In this case, it is proposed to apply special gasification technologies tending to maximum methane recovery. The proposed solutions give the possibility to define the trends of our further research. They will be highlighted in the following authors’ studies.

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“…Existing studies [1,2,[19][20][21][22][23], note a tendency toward a decrease in the activity of the rock pressure anomalies action over time t that has passed since the end of the stope works. The parameters of anomalies in the borders of the protecting pillars substantially depend on the rheological phenomena of creep deformations and stresses relaxation; but there is one more important factor here -the process of shrinkage (consolidation) of previously collapsed rocks in the mined-out space under the geostatic pressure action.…”

Section: Problem Statement and Solutionmentioning

confidence: 99%

Principles for certain geomechanics problems solution during overworking of mine workings

et al. 2021

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This paper deals with two relevant and interrelated directions of coal mining development. Firstly, the resource-saving complete extraction of reserves, and secondly, the intensification of mining activity through mining operations conducted on several seams. The objective of overworking of mine workings with a real representation of mining-and-geological and mining-engineering conditions has been formulated. Five peculiarities of the geomechanical models construction for overworking of mine works have been revealed and substantiated. The technology for performing a series of computational experiments is proposed. The task of the protecting pillar influence, which is located in overlying coal seam, on the state of mine working placed in the underlying coal seam has been solved. An optimal scheme for its maintenance is proposed.

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Underground monitoring as the best way of roadways support design validation in a long time period

Cited by 39 publications

References 24 publications

Investigation of the evolution and control of fractures in surrounding rock under different pressure relief and support measures in mine roadways prone to rockburst events

Investigation of the evolution and control of fractures in surrounding rock under different pressure relief and support measures in mine roadways prone to rockburst events

Gas hydrates technologies in the joint concept of geoenergy usage

Principles for certain geomechanics problems solution during overworking of mine workings

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