Research on the relation between rock burst and movement of strata and surface

Large-scale bed separation in bending strip upside cranny strip was brought by un-consistency of overlying strata subsidence movement due to under surface mining. Different characteristic of movement and deformation of overlying strata and surface include periodic caving of bed separation interspaced along with work face mining. Conglomerate rock layer movement is the main power fountain of rock burst on the basis of locale observation. And rock burst moves periodically adapted to movement of deep conglomerate rock layer which had similar characteristic with main roof. Practice indicates this method that forecasting and prediction using correlation information of movement of strata and surface is feasible and has reference meaning for similar stope.

地下煤炭开采对地表油气设施的影响距离研究

地下煤炭开采之后,采空区上覆岩层中会形成一个沉陷盆地,直接威胁到区域内油气设施的安全。以鄂尔多斯盆地大牛地气田与葫芦素煤矿重叠区域为研究背景,采用概率积分法和现场观测,分别对地下采煤过程上方地表的移动变形情况进行预计和测量,通过对比分析,确定采空区影响范围,从而确定交叉开采避让距离,保障油气设施的正常运行,为大牛地气田与其它共生煤矿交叉条件下油气井、管道及地面油气设备设施的安全防护提供技术支撑。