Modeling of discontinuous deformations over shallow post-mining voids in the rock mass

Abstract

Sinkholes that are often formed over shallow mining workings constitute a significant threat to buildings, infrastructure and-most of all-to the residents. These deformations often occur after a long time following the completion of mining works. A considerable number of sinkholes are formed above shallow headings due to the loss of bearing capacity of old wooden supports. Because of the above, the problem of predicting the formation of sinkholes gains significance. This paper presents the assumptions of Strzałkowski's method of predicting discontinuous surface deformations (sinkholes). The deterministic model reflects the essence of the mechanism of destruction of the rock mass surrounding the void. The presented study case-another example of using the method for providing an ex post prognosis indicates its practical usability. The computer programme used in this paper is helpful to laborious calculations.

Law of Movement of Discontinuous Deformation of Strata and Ground with a Thick Loess Layer and Thin Bedrock in Long Wall Mining

“…These countries have studied the measurement methods, formation mechanism, and prediction methods of mining ground fractures. Ground collapse pits formed by underground mining are also the main forms of discontinuous deformation, which occur less in China, mainly in Poland [17][18][19][20][21][22], India [23][24][25][26], South Africa [27,28], UK [29,30], Japan [31], Spain [32], Korea [33], Turkey [34], etc. Taking Poland as an example, the monitoring, formation mechanism and prediction model of coal mining collapse pit are focused on.…”