论文部分内容阅读
宝山矿2#砂页岩矿体采用黄土-废石胶结充填法回采。为了确定其合适的配合比,采用RMT-150B岩石力学试验机对七种配合比的黄土-废石胶结充填体的标准试样进行了抗压强度测试,利用测试结果选择C组配合比的黄土-废石胶结充填体应用于该矿工业性试验采场进行充填,并对该试验采场的充填体进行了应力测试。研究结果表明:黄土-废石胶结充填体的破坏过程分为五个破坏阶段;黄土-废石胶结充填体的强度随黄土加入量的增加而减小,随水泥加入量的增加而增加;初期强度随水泥加入量的增加而提高;选用C组配合比的黄土-废石胶结充填体充填试验采场的应力为2.25 MPa,其龄期为60 d时为原岩体的抗压强度的47.4%,满足该矿对充填体强度的要求;研究成果为其它采场选用合适的胶结充填体的配合比提供了依据。
Baoshan Mine 2 # sand shale ore body using loess - waste rock cemented filling method. In order to determine the suitable mix ratio, the compressive strength of seven standard samples of loess-waste cemented cements with different proportions was tested by RMT-150B rock mechanics testing machine. The test results were used to select the loess The waste rock cemented filling body is used to fill the stope of the mine industrial test and the stress test of the filling body of the stope is carried out. The results show that the failure process of loess-waste cemented cemented filling body is divided into five stages: the strength of loess-waste cemented backfill body decreases with the increase of the amount of loess, and increases with the addition of cement; The strength increases with the increase of cement content. The stress of stratum in loess-waste cemented cemented filling body filled with C is 2.25 MPa, and the compressive strength of original rock body is 47.4 %, To meet the requirements of the mine on the strength of the filling body; research results provide the basis for the selection of suitable cementing filling body with other stopes.