Journal of Coal Science and Engineering (China)
1866-6566
1006-9097
Cơ quản chủ quản: N/A
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Field investigation into directional hydraulic fracturing for hard roof in Tashan Coal Mine
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Study on the characteristics of grout permeation based on cylindrical diffusion
Tập 19 - Trang 57-62 - 2013
Permeation grouting is widely applied for its low grouting pressure and minor disturbance to the stratum in grouting engineering, especially in engineering with strict requirements on ground settlement. However, permeation grouting theory lags behind compared with other engineering disciplines, and the theoretical formulas now available cannot accurately be used to guide grouting engineering desig......
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The strata of Jurassic was divided into three tectonic sequences and eight sequences of third rank, according to the developing feature of the tectonic inconformity and the transforming feature of the depositional system tracts. Also the identification and the division of the base-level cycle of different period were carried through. Therefore three cycles of super period, eight cycles of long per......
Three-dimensional strata movement around coal face of steeply dipping seam group
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Numerical analysis on water-inrush process due to floor heave
Tập 14 - Trang 225-229 - 2008
To investigate the water-inrush process due to floor heave, simulation model was made and factors of mining height, immediate roof strength, water pressure, depth and strength of confiningbed, excavation step distance and bury depth were analyzed by using UDEC software. Five zones theory (containing two maximum main stress circles and three maximum main stress stratiform zones) along excavation di......