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为了指导徐州矿区深部巷道维护及开采安全,在5个埋深超过800 m的深井采用空心包体三维应力解除法进行了原岩地应力测量。实测数据表明:所有测点的最大水平主应力均略大于垂直主应力,方向呈NW-SE向,近水平方向;由于受区域地质构造作用,地应力存在东西差异,西部和西北部矿井,近似呈静水压力型,东部矿井水平应力是垂向应力的1.19～1.23倍;分析了深井地应力量级、主应力与侧向系数随深度的分布规律;分析了区域郯—庐大断裂左旋平移的基础上形成的北东向徐—宿弧形推覆构造作用影响,确立了矿区实测地应力场与区域地质构造的一致性关系,为深部开采提供可靠的地应力基础数据。
In order to guide the maintenance and mining safety of deep roadways in Xuzhou mining area, the original ground stress measurement was carried out by using three-dimensional hollow core excavated stress relief method in 5 deep wells with a depth of more than 800 m. The measured data show that the maximum horizontal principal stress at all measuring points is slightly larger than the vertical principal stress and the direction is NW-SE direction and nearly horizontal direction. Because of the geological structure in the region, there are some differences in the ground stress between the west and northwestern mines, The horizontal stress of the eastern mine is 1.19 ~ 1.23 times that of the vertical stress; the distribution rules of ground stress magnitude, principal stress and lateral coefficient with depth are analyzed; and the left-lateral translation of the large fault Based on the formation of the North East Xu - stern arc-shaped nappe tectonic effect of the established mining area measured geostress and regional geological structure of the consistency of the relationship between the deep mining to provide reliable basic data of stress.