摘要
系统地进行了地下水动力学参数、覆岩力学组合结构特征与基岩风化带的阻隔水特性试验。结果表明:风积沙层底部含水层为强含水层;主采煤层上覆覆岩泥岩强度高于砂岩;砂岩孔隙率高、含水量大,抗压抗拉强度比值高;泥岩和砂岩的粘土矿物含量均低。具有典型的脆性易裂、抗扰动能力差和再生隔水能力弱等新的破坏移动特性。并通过多因素拟合确立了薄基岩浅埋煤层覆岩采动破坏"两带"高度的动态变化特征,提出了长壁工作面开采防止突水溃砂的调控技术,成功应用于榆阳煤矿并实现绿色保水开采。为陕北榆神大煤田薄基岩浅埋煤层进一步推广高效开采技术和保护生态环境实现绿色保水开采奠定了基础。
The test of the dynamics parameters of the ground water and the covering--rock mechanics and the capability of reborn insulating water is systemically carried. The result indicates that the intension of muddy rock is higher than that of sand rock, the rate of holes is high, the moisture content is big, the ratio of the compressive and tensile strength is high, the content of the clay mineral is low which has typical cranky characteristic of the brittleness. By fitting many factors, the prediction model of the height of two zones of overburden damage by mining the shallow buried coal seam of thin base rock is constructed, the key technology of avoiding water and sands bursting in the long wall face is brought forward, which is successfully applied in Yu Yang coal mine and achieves the mining of green conserving water. This establishes a base for extending the high efficient mining technology of the shallow buried coal seam of thin base rock in the zone of Shan Bei.
出处
《安徽建筑工业学院学报（自然科学版）》
2009年第2期66-69,73,共5页
Journal of Anhui Institute of Architecture(Natural Science)
关键词
薄基岩浅埋煤层
覆岩破坏
绿色保水开采
突水溃砂
the shallow buried coal seam of thin base rock
overburden damage
mining of green conserving water
water and sands bursting
