Title: MECHANISM OF RIGID OVERLAYING OF CARBONIFEROUS STRATA FAILURE IN FACE MINING IN THE CASE OF A MULTISEAMS DEPOSIT |
Authors: Jiránková Eva, Staš Lubomír, Kajzar Vlastimil and Doležalová Hana |
DOI: 10.13168/AGG.2013.0019 |
Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 2 (170), Prague 2013 |
Full Text: PDF file (0.4 MB) |
Keywords: subsidence trough, rock mass, overlying strata, longwall mining, tensor stress measurement |
Abstract: of more than 1 m in the Ostrava–Karvina Coalfield), and in one case to longwall mining with controlled caving. The
assessment of failure of rigid overlying strata makes it possible to distinguish whether the rigid overlying strata of rocks has
been deformed or whether a strutting arch has been formed over the goaf below which is an area that is free from stress. Good
knowledge of the mining, technical and geological conditions of a given site is a prerequisite for successful evaluation.
There are advantages to utilising surface measurements for interpreting the effects of changes in rock mass, especially in areas
of high overlying strata. The practical importance of failure assessment of overlying strata consists in determining the size of
the mined-out area where the deformation of the rigid overlying strata occurred, which is dependent on the character of the
rock mass.
This paper is set in the context of the expected width of the goaf during deformation of rigid overlying strata within
parameters that describe the mining and geological conditions of the locality. Changes in the area of the goaf, based the
results of tensometric measurements, will also be placed in context. |