Journal of Coal Science and Engineering (China)
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Drainage feature about coalbed methane wells in different hydrogeological conditions in Fanzhuang area
Journal of Coal Science and Engineering (China) - Tập 18 - Trang 344-349 - 2012
It is an important guarantee to enhance the production of coalbed methane (CBM)
and reduce the project investment by finding out the drainage feature about CBM
wells in different hydrogeological conditions. Based on the CBM exploration and
development data on the Fanzhuang block in southeast Qinshui Basin and combined
with the seepage principle and lithology on the roof and the bottom coalbed, the...
Modeling of a slurry bubble column reactor for Fischer-Tropsch synthesis
Journal of Coal Science and Engineering (China) - Tập 18 Số 1 - Trang 88-95 - 2012
Tracer gas measurement and simulation of turbulent diffusion in mine ventilation airways
Journal of Coal Science and Engineering (China) - Tập 14 - Trang 523-529 - 2008
The effective diffusion coefficients in mine ventilation-flows had been obtained
as 4 to 200 m2/s by matching the measured concentration-time curves with the
advection-diffusion equation. The turbulent diffusion coefficients in the simple
airways have good agreement with the equation proposed by Taylor. However, for
complex airways in operating mines, the evaluated effective diffusion
coefficients...
Numerical simulation and experimental research of surrounding rock deformation of floor roadway under short-distance coal seam group combined mining
Journal of Coal Science and Engineering (China) - Tập 16 - Trang 230-234 - 2010
According to the influence of the combination of short-distance coal seam group
on mining roadway, using numerical simulation software FLAC2D to draw the
abutment pressure distribution ahead the working face and the area of influence
in fully-mechanized mining conditions, the variation rules of surrounding rock
supporting pressure of floor roadway and the deformation rules were summarized.
GYS-300...
Bond interface crack propagation of fresh foundation concrete and rock under blasting load
Journal of Coal Science and Engineering (China) - Tập 15 - Trang 61-65 - 2009
According to concrete age, the dynamic stress intensity factors of bond
interface crack of concrete-rock was calculated. Result shows that the
propagation of concrete interface crack is mainly caused by tensile stress and
shear stress for stress wave reflection. With the growth of concrete age,
interface crack fracture toughness increases, and its capacity of resisting
blasting load strengthens. T...
Research on numerical emulator of mine methane and coal dust explosion
Journal of Coal Science and Engineering (China) - Tập 14 - Trang 447-452 - 2008
The mathematical physics model of mine methane and coal dust explosion
propagation was established in the research, by using continuous phase,
combustion, particulate equations of mathematical physics. Based upon the data
from mine methane drainage roadway explosion, and mine methane and coal dust
explosion propagation experimental studies, the numerical emulator system of
mine methane and coal du...
Effect of loess for preventing contamination of acid mine drainage from coal waste
Journal of Coal Science and Engineering (China) - Tập 18 - Trang 302-306 - 2012
Acid mine drainage (AMD) that releases highly acidic, sulfate and metals-rich
drainage is a serious environmental problem in coal mining areas in China. In
order to study the effect of using loess for preventing AMD and controlling
heavy metals contamination from coal waste, the column leaching tests were
conducted. The results come from experiment data analyses show that the loess
can effectively...
A simplified testing method for stress-induced of tunnel surrounding rock
Journal of Coal Science and Engineering (China) - Tập 16 - Trang 225-225 - 2010
A simple testing method for secondary or induced stress of surrounding rock was
presented by laboratory experiment, numerical simulation and in situ testing
based on the basic principle of the historical stress restoring method. First,
stress equivalent coefficient, which key coefficient of stress restored testing,
was obtained by laboratory experiment. Second, experimental results were
examined u...
Comprehensive analysis of safe mining to heavy and steep coal seam under complex geophysics environment
Journal of Coal Science and Engineering (China) - - 2008
In virtue of effect of N-S intensive ground stress and mining disturbance to
+579E2EB1+2 mining site at Weihuliang Mine, the dip angle and section height is
65° and 52 m, respectively, the collapses happed frequently during mining.
Firstly, mining conditions, spatial structure and parameters were investigated.
Then physical simulation and dynamic numerical tracing and elaborate simulation
relating...
Strata-pressure behavior of double-unit mining method combining fully-mechanized and mechanized coal face
Journal of Coal Science and Engineering (China) - Tập 19 - Trang 454-461 - 2013
Based on the engineering background of double-unit face mining under complicated
geological conditions and the lagging fully-mechanized face surpassing the fore
mechanized face of double-unit face in Zhou Yuanshan coal mine, strata-pressure
behavior in the process was analyzed based on FLAC3D and on-site measurement.
The results show that the stress concentration factor of superposition abutment
p...
Tổng số: 399
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