The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Voi. XXXVII. Part B7. Beijing 2008
3.3 Metamorphic rock area
1. In middle to deep metamorphic rock area, it can
commendably identify out image information of marble and
quartz rock. According to the image marker strata, in
epimetamorphism rocky area it can commendably carry out
identification and mapping for stratum unit.
2. It can better identify out old granite body of metamorphic
rock region.
3. According to structural feature of marker bed, it can analyses
deformation process for metamorphic rock area and is also billy
effective for identification of the deeper deformation band of
alinement and reticulation.
4. REMOTE SENSING SURVEYS FOR MINERAL
RESOURCES
Our country is rich in mineral resources and remote sensing
technique is fully broad in application prospects. Remote
sensing technique has already been comparatively mature in
regional geological mapping and procured nice effects. There
are also more discoveries in geologic structure and mineral
study, with cycle largely shortened and expense economized at
the same time.
In survey aspect of geology mineral resources, remote sensing
technique has developed from indirect detection to direct
detection phase in our country, for instance, in Zhun Ge Er
region of Xinjiang it directly detects out alteration zone of rock
gold mine by using the subdividing infrared and multispectral
scanning technology and achieves an important headway of
remote sensing technique by which to directly search a gold
mine. Our country also carries out the direct detection test of
remote sensing of oil and natural gas resources by using short
wave infrared imaging spectrum scanner in Xinjiang. Via
information enhancement and extraction by using the remote
sensing image data, it captures the hydrocarbon abnormity
caused by microseepage leak on surface by oil gas accumulation,
further achieves the purpose of direct detection. The project
obtains confirmations in many production tests in Xinjiang
Tarim Basin. Successful application of these technologies exerts
an active action for expediting western development in our
country.
Aiming at coal industry taking manifold satellite remote sensing
image as information source, it farthest extracts regarding rock
(sedimentary rock, magmatic rock and metamorphic rock),
strata (especially coal bearing strata), structure, coal geology
abnormity and other information within survey areas, combined
with predecessor's data, analyze geologic structure characteristic
and coal geology basic feature of region of interest, unfolds the
demonstration working of field investigation, understands the
upgrowth characteristic and deposit state of coal bearing strata,
studies coal accumulation regularity and delineates coal bearing
prospect area.
Taking visual interpretation as predominating and computer
information extraction image as supplement, image explanation
mainly explains regional control basin, coal controlling fault,
stratal distribution, lithology, lithofacies and thickness changes
orderliness, dislocation, plicated property, scale and upgrowth
characteristic, finally establishes interpretation symbols of
remote sensing of strata and structure and frames out the
demonstration plan of field investigation. To extrude the
characteristic of coal-bearing strata and non-coal-bearing strata,
it enriches image information of dislocation, fold and other
structures, enhances explanation effect, feasibility and
foreseeability of survey working. It can also carry out digital
enhancement processing for image by manifold methods.
Remote sensing geology explanation and field investigation
demonstration can ascertain the epoch, distribution range,
depositional feature of coalbearing strata and change of
coalbearing features. By analyzing space distributive orderliness,
on the basis of survey comparison for correlative layers, it can
delineates various coalbearing strata in survey area.
Via information extraction of geognosy of remote sensing
image, it can explain and verify main fault structure within area.
According to every geology block characteristic and boundary
fault property, starting from coal series gather and deposit
background, structural unit can be partitioned to analyze control
action of rupture and all levels of structural unit for coal series.
Via analyses and research for age-old geography of gather coal
acting, ancestral structure evolution, gather coal action, gather
coal basin genesis of various periods, it can ascertain type of
gathering coal basin in area.
Tectonic framework of remote sensing geology of work area is
established to analyze the control action of coal structure for
coal basin and coal series, to study coal basin genesis, to
ascertain distribution range of coal basin and coalbearing strata,
to understand upgrowth and deposit characteristic of
coalbearing strata, to study ancestral structure, age-old
geography and depositional environment of coalforming period,
to analyze reconstruction action of anaphase structure for coal
basin, coal seam and coal quality, to summarize coal
accumulation regularity, under precondition of mastering coal
accumulation regularity fully and to delineate prospect area of
containing coal.
Applying remote sensing technique to carry out coal resource
survey possesses accuracy, high efficiency, economy and a
good many of other predominance, especially on occasions in
which work area is bad in natural conditions, inconvenient in
traffic, coal geology study is low in degree, it can exert fully
remote sensing technique’s predominance and procure new
outcomes.
5. MINE FIELD GEOLOGIC HAZARD MONITORING
AND GOVERNING
Coal district geologic hazard is mainly surface collapse, fracture,
mine water invasion caused by underground mining and coast
and fracture generated by open pit mining. In underground
production area surface collapse and fracture ordinarily exist in
coalfield district, especially in exploitation of major scale coal
industry base, it is more striking. The surface of working
section is in the instability in long term, harmful to tilth, bourg,
road facility and mine safe production in mining section,
already becoming an important factor to restrict area economic
development. Along with increase of mining depth and
complexity of exploitation conditions, especially exploitation in
minefield of complex hydrogeologic condition, mine water
invasion will also be increasingly striking. In addition, coal
gangues pile up in various coal districts and occupy more than
9000 mou, in which to occupy farm area of about 3000 mou.
Main harms of coal gangue are spontaneous combustion, dust
nuisance and explosion, pollution of minefield environment and
harm of human health.