Tytuł artykułuPrediction of the Height of Overburden Fractured Zone in Deep Coal Mining: Case Study
Tytuł czasopismaArchives of Mining Sciences
Słowa kluczowethe height of overburden fractured zone ; numerical simulation ; orthogonal design ; in-situ test
Wydział PANNauki o Ziemi
Archives of Mining Sciences (AMS) publish research results of wide interest in all fields of mining sciences which include: rock mechanics, mining engineering, mineral processing, geotechnical engineering and tunnelling, mining and engineering geology, minig geodesy and geophysics, ventilation systems, environmental protection in mining and economical aspects in mining.
The journal established by the Polish Academy of Sciences, has been regularly issued since 1956. It enable collaboration and exchange of ideas between researchers from different countries as well as provides forum for the publication of high quality papers.
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In the process of coal extraction, a fractured zone is developed in the overburden above the goaf. If
the fractured zone is connected with an aquifer, then water inrush may occur. Hence, research and analysis
of the height of overburden fractured zone (HOFZ) are of considerable significance. This study focuses
on the HOFZ determination in deep coal mining. First, general deformation failure characteristics of
overburden were discussed. Second, a new method, numerical simulation by orthogonal design(NSOD),
have been proposed to determinate the HOFZ in deep coal mining. Third, the validity of NSOD is verified
in the practical application, compared with empiric al formula in Chinese Regulations and in-situ test.
These three methods were applied to determine the HOFZ of working face No. 111303 in No. 5 coal
mine. The pre dicted HOFZ of NSOD is found to be similar to the result of the in-situ test (8.9% relative
error), whereas the HOFZ calculated by the empirical formula has extremely large error (25.7% relative
error). Results show that the NSOD can reliably predict the HOFZ in deep coal mining and reduce time
and expenses required for in-situ test.
WydawcaCommittee of Mining PAS
TypArtykuły / Articles