崩落的拼音和意思

sub level caving is a large scale mining method suitable for large ore bodies with a steep dip and a rock mass where the host rock in the hanging wall will fracture under control conditions therefore the infrastructure is always placed on the footwall side mining starts at the top of the ore body and progresses downwards in a safe sequence it is a productive mining method where all of the ore is fragmented by blasting and the host rock in the hanging wall of the ore body caves once the production drifts have been excavated and reinforced the opening rays and long hold drilling in ring patterns are completed minimizing whole deviation when drilling is crucial as it will affect the fragmentation of the blasted ore and therefore also affect the flow of the caving rock mass rock is loaded from the cave front after each blasted ring in order to control dilution of waste rock in the cave loading a predetermined extraction percentage of rock is done or if there is a significant difference in density between ore and waste rock bucket waying can be utilized for dilution control unloading from the cave front it is important for the productivity to keep the roads maintained in a good condition dumping the ore into ore passes connected to the holage level is an efficient way of transporting rock from the production points to the crusher each sub level features a systematic layout with drifts across the ore body activities in the parallel production drifts are performed simultaneously in order to maintain a good process in the mine due to caving of waste rock into the blasted ore a certain degree of ore loss and waste rock dilution comes with the method caving will sooner or later also cause substance on the surface sub level caving is a productive large scale mining method that enables safe and efficient use of mining equipment with good mind planning there are also great opportunities for automation。

来，跟着我念。知识是 knowledge 的 意思哦，是 knowledge 的 意思啊，这个简单，只是 instructions 的 意思。 what 啊 what 不是 knowledge 吗？怎么变成了 instruction？ 是 是是， only 的 意思。 stop stop。 这这怎么又是 only only what hey look here。 直视 look straight 的 意思。 no i don't want to look at you。