Non-pillar sublevel caving mining method for direct loading for ore

Abstract

The present invention relates to a non-pillar sublevel caving method. The non-pillar sublevel caving method which loads and transports ores directly is characterized by comprising the steps as follows: two or more dipheads are tunneled downwards at the position of an orebody near a heading side along the orebody tendency and are used as main haulageways; segmented haulageways are tunneled from the dipheads to divide the orebody into segments; a stoping drift is tunneled from the segmented haulageways; the inner end of the stoping drift is tunneled a cutting roadway and a cutting winze; a vertical upward or oblique upward cutting slot medium and deep hole is drilled at the top plate of the cutting roadway, and the cutting slot is explored and formed on the cutting winze as a free surface; a mining medium and deep hole is drilled in the whole stoping drift, and the mining medium and deep hole of the stoping drift is explored on the cutting slot as the free surface to break ores; the ores are drawn under overlying rocks at the end of the stoping drift, and the ores are loaded on a tramcar directly to be transported out; when stoping, the processed of exploring the mining medium and deep hole, ore drawing and transporting out the ores are processed in the stoping drift, and the retreating mining is circulated until the stoping drift is mined completely. The non-pillar sublevel caving mehod has low cost, high ore recovery ratio, safe production and wide application range.

Description

technical field [0001] The invention belongs to the technical field of underground mining of mineral resources, and in particular relates to a pillarless segmental caving mining method. Background technique [0002] Since the successful research of Swedish iron mines in the 1960s, the pillarless segmental caving mining method has been popularized in the underground mining of metal mines worldwide. Currently, it accounts for more than 80% of the underground mining of iron mines in my country, and has a high ore recovery rate. , high degree of mechanization, simple process, high efficiency, safety and other advantages. This method (such as Figure 1-3 shown) require the ore body and its footwall rock mass to be basically stable, so as to arrange and excavate the transportation roadway outside the vein ( figure 2 In the label 1), pedestrian equipment patio ( figure 2 Mark 3) and ore-drawing chute ( Figure 2-3 The label 4). Since the lithology of the footwall rock mass of ...

AI Technical Summary

Problems solved by technology

Otherwise, not only will it be difficult to excavate the ore-drawing chute, the pedestrian equipment patio and the transportation roadway outside the vein, the service life will be short, and the maintenance cost will be high, and they will easily collapse and cause accidents

After searching, there is no precedent of applying the pillarless segmental caving mining method in the weak footwall surrounding rock deposit

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