... method is adopted to mine No. 10 coal seam in Pangpangta Col- liery. The seam is 8.60 13.30 m thick and the average thickness is 11.40 m. There are 1 3 levels of carbon mudstone dirt band with a thickness of 0.10 0.38 m in the seam. The roof is grayish black mudstone or sandy mudstone with a thickness...

... of the fine sand and clay, including more argillaceous shale, poor gradation, natural rest Angle between 25 30 . The cretaceous shale contains more grit with low strength. The quaternary water perco- late to the pit, reducing the strength of unconformity mudstone, sliding resistance. All make the slope slide...

..., geological disasters and engineering stability (Wu 1997&Cai 2000). Most parts of the deep-buried underground tunnel project in this paper lie in high stress area. Reservoir Characterization mudstone MPa stress measurement Upstream Oil & Gas deep-buried tunnel Tunnel Project reservoir...

... construction caused by floor heave, which seriously affect production, and threaten life safety[1]. reservoir geomechanics floor heave floor mudstone soft rock roadway Reservoir Characterization Engineering mudstone Upstream Oil & Gas displacement heave rock mass deformation horizontal...