Forecasting of hollows in abandoned shallow coal mines in zone of intensive weathering

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Empirical criteria (K1-K2> 0 and η-K3 >0) for predicting the presence of hollows in abandoned shallow underground workings in Donetsk city (Ukraine) located in the zone of intensive weathering are proposed. The hollows exist when both inequalities K1-K2>0 and η-K3 >0 are satisfied. The statistical analysis has established that the value of criterion K2 is inversely related to rock quality designation (RQD) and that a decrease in RQD leads to a decrease in K1-K2 and, hence, the probability of the hollow existence is decreased. It is also established that a statistical parameter in the left-hand part of inequality η-K3>0 decreases according to logarithmic law with increasing standard linear intensity of weathering-induced fractures (P10). When the fracture intensity (P10) increases, the probability of the presence of a hollow is decreased. The proposed criteria confirm that a thick immediate roof and sandstone layers contribute to the existence of hollows, whereas weak alluvium, argillites and sandy shale allow a collapse of the rock mass.

Original languageEnglish
Title of host publicationProceedings of the 16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment
Subtitle of host publicationChallenges, Processes and Strategies, IAMG 2014
EditorsN. Janardhana Raju
PublisherCapital Publishing Company
Pages44-46
Number of pages3
ISBN (Electronic)9789381891254
StatePublished - 1 Jan 2014
Event16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment: Challenges, Processes and Strategies, IAMG 2014 - New Delhi, India
Duration: 17 Oct 201420 Oct 2014

Publication series

NameProceedings of the 16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment: Challenges, Processes and Strategies, IAMG 2014

Conference

Conference16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment: Challenges, Processes and Strategies, IAMG 2014
Country/TerritoryIndia
CityNew Delhi
Period17/10/1420/10/14

Keywords

  • Abandoned working
  • Fracture intensity
  • Hollow
  • Weathered rock

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