赵楼井田地应力特征及地质构造形成机制

In-situ stress characteristics and geological structure genetic mechanism in Zhaolou mine field

采用钻孔套芯应力解除法在赵楼煤矿井底车场位置选点进行了地应力测量。测量结果表明,最大主应力方向为NEE,反映出测点附近应力场为以NEE向挤压为主的水平构造应力场,与邻近的万福煤矿实测地应力结果基本一致。由区域布格重力场和震源机制解资料得出,鲁西南地区现代地应力场为NEE向水平挤压的构造应力场,赵楼井田地应力场受区域构造应力所控制。通过地质构造成因分析,认为井田构造早期以EW、NE向褶曲为主,晚期以近NE、NW向断层为主,并使早期断层性质发生转换,不同期次构造组合形成了矿井现今复杂的构造格局。

In-situ stress was measured by overcoming method in borehole in Zhaolou Coal Mine shaft station.The stress measurement results point out that：maximum principal stress is dominantly oriented NEE and the results reflect stress field nearby measuring point is horizontal tectonic stress field with NEE direction extrusion.This results is in agreement with the measurement results of Wanfu Coal Mine.The regional Bouguer gravity field and focal mechanism solution obtain that the current stress field is horizontal tectonic stress field with NEE direction extrusion in southwest of Shandong Province,and the stress field of Zhaolou mine field is controled by regional tectonic stress field.Through the analysis of geological structure genetic mechanism,consider that EW and NE directions folds mainly formed in early and NE and NW directions faults main formed in later in Zhaolou mine field,and the faults which formed in later transformed the property of faults formed early,and the geologic structures formed in different geological periods constitute the present complex tectonic framework in Zhaolou mine field.