论文部分内容阅读
为了探究超细粒级浸出渣与分级尾砂混合作为充填骨料的充填体强度能否达到凡口铅锌矿井下充填的要求,开展了浸出渣与分级尾砂的充填配比试验。通过充填配比试验,分析不同配比和质量分数的充填料浆的流动性和充填体强度特性。结果表明:质量分数对充填体强度的影响较大;灰砂比、质量分数越大,充填体的强度越高;在一定范围内,增加浸出渣的用量可提高充填体的强度;扩散度可以很好地反映充填料浆的流动性,充填料浆的流动性随质量分数增加而减小,当质量分数较高时增加水泥用量可提高充填料浆的流动性,增加浸出渣含量会导致充填料浆的流动性降低。根据凡口铅锌矿充填技术要求及室内充填配比试验结果,得出不同部位的最佳充填配比:矿房采场的最佳灰砂比、浸出渣与分级尾砂之比、质量分数分别为1∶6、1∶5、71%,间柱采场为1∶6、1∶6、69%,首层和浇面为1∶3、1∶6、71%。
In order to investigate whether the strength of the filling body mixed with graded tailings and ultrafine graded leach slag can meet the requirement of downhole filling in the lead-zinc mine of Fankou, the proportioning test of leaching residue and grading tailings was carried out. Through the filling proportioning test, the fluidity and filling strength characteristics of filling slurry with different proportions and mass fractions were analyzed. The results show that the mass fraction has a great influence on the strength of the filling body. The larger the weight ratio of sand to sand is, the higher the strength of the filling body. In a certain range, increasing the amount of leaching residue can increase the strength of the filling body. The fluidity of filling slurry is well reflected in the fluidity of filling slurry. The fluidity of filling slurry decreases with the increase of mass fraction. When the mass fraction is higher, increasing the amount of cement can improve the fluidity of filling slurry. Increasing the content of leaching residue will lead to filling Slurry fluidity is reduced. According to the technical requirements of Fankou lead-zinc filling and indoor filling proportioning test results, the best filling proportion of different parts is obtained: the best ratio of sand-limestone, the ratio of leached slag to graded tailings, the mass fraction Respectively 1: 6,1: 5,71%, between the column stope for the 1: 6, 1: 6, 69%, the first floor and the surface of 1: 3,1: 6,71%.