复杂地质条件下覆岩破坏规律研究

Overlaying Rock Failure Law under Complex Geological Conditions

目前对复杂地质条件下裂缝带和冒落带的高度研究不足,对诸如断层、褶皱等对裂缝带和冒落带高度影响规律研究很少,故结合京福高速公路徐州绕城西段过柳新矿和新河矿老采空区钻孔实测数据,对该地区的裂缝带高度和冒落带高度进行了研究,主要从老采空区、断层和向斜3个方面进行了分析,得到结论:时间因素对裂缝带高度的影响要远大于对冒落带高度的影响;断层对裂缝带高度和冒落带高度均有影响,但影响程度不同;在向斜的不同位置上,裂缝带和冒落带高度受到的影响程度不同。这些规律为今后在类似条件下进行老采空区上方建筑设计和计算冒落裂缝带高度提供了参考。

At present, there has been little study on the effect law of fault and folding on the height of fracture belt and caving belt under complex geological conditions. Therefore, using the practically measured data of the Xuzhou roundthe-city west section of Beijing-Fuzhou Highway that passes the old mined-out areas of Liuxin Mine and Xinhe Mine, a study is conducted on the height of the fracture belt and caving belt in this area. The analysis is made mainly from the old mined-out area, fault and syncline aspects and it is concluded that the effect of the time on the fracture belt is much greater than that on the caving height; the fault has effect on the height of both fracture and caving but different in degrees; and the effect on the height of fracture and caving is different when at different syncline locations. These laws can be the reference for the construction design and calculation of the caving and fracture height over the old mined-out areas under the similar conditions.