Presenting new technologies in underground coal extraction, with
special attention to mine galleries support and maintenance, load
mechanism of "massif-support system-safety system" systems,
analysis of face equipment for thin coal seams mining and
substantiation of rational stoping parameters.
Advanced surface mining technologies of coal and ore are discussed
in an original form, stability calculations of internal dumps and
open-cut faces are presented, as well as examination of land
surface subsidence using modern methods of calculation experiments.
Special attention is given to the complex mining of mineral
resources, such as: iron ore, coal deposits with drilling advance
degassing wells, methane extraction from coal and anthropogenic
deposits, heat receipt from mine water with help of thermal
pumps.
The unique geological conditions for mining in Poland and the
Ukraine require a new technological approach for mining thin and
very thin coal seams with thickness of 1 meter and less, using
selective coal extraction methods, leaving rock behind in the mine.
Relevant technological solutions are discussed in this
volume.
Further, technological process control during coal seams
underground gasification is described together with
pressure-temperature conditions of gas hydrates formation from
gaseous mixtures of various content. Substantiation is also given
to gas hydrates extraction technologies development and 21st
century new pulse technologies of well drilling and a temperature
mode of a rock-cutting tool and equipment with cryogenic-gravel
filters is examined.
Gas extraction processes located in flooded deposits with uniform
and macroheterogeneous collectors are presented with the
description of an effective methodology of two-subbench technology
of ore deposits extraction.
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