(1) The ore body is first divided into panels, and the ore section is divided into sections, and the ore section is the mining unit.
(2) Implement mining environment reengineering. In the top column part of the mine section, 1-2 layers are separately recovered by the traditional downward layered cementation filling method, and then filled with high-grade concrete to form an artificial roof column; at the bottom column part, After the shallow hole falling mining method recovers a certain height, the artificial bottom column with the mining system is poured with concrete. Since the surrounding rock of the upper and the F disk is not stable, the cutting groove should be formed along the ore body and cemented and filled to form a manual column (or a stable ore column formed by grouting). A relatively stable and confined space is formed around the re-soil section. The “reconstruction of the mining environment†is completed.
(3) Reserve a small well of a certain size in the artificial roof column. As the filling well of the mining process towel, the filling well and the filling well filling the narrowing area, refer to the deep hole resistance line size under the artificial roof column to form deep hole rock drilling. Laneway diverticulum.
(4) Reservation ore pillar artificial opening in a lower portion; forming a large free surface and the compensating space falls Mine seven, or by local roadway mining shallow hole in Mine method of artificial pillar.
(5) Drilling the large- diameter deep hole of the large resistance line with deep-hole rock drilling equipment in the rock drilling chamber , and then performing the spherical drug pack down to collapse in the full height of the stage; the joint cracks in the confined space are relatively developed. The ore body can be harvested by the method of forced and induced coupling of higher education, and under certain conditions, even natural collapse can be used.
(6) A large number of caving ore is transported by the scraper through the ore discharge port, and the enhanced ore is carried out: after the completion of the mining, the tailings are filled with the full tailings (or low-grade concrete) through the filling of the small well in the artificial top column. .
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