A downward approach layered cemented filling mining method

Abstract

The invention provides a downward drift layered cemented filling mining method, and belongs to the technical field of layered cemented filling mining methods. The downward drift layered cemented filling mining method provided by the invention avoids tunnelling of a filling tunnel and a small filling well, reduces or avoids a large quantity of rubbles and improves the filling height of a mined-out stope access. By adopting the mining method, the small filling well and the filling tunnel are not tunnelled, so that waste stone produced by tunnelling the small filling well and the filling tunnel is eliminated, ore dilution is reduced, and blasting fume poisoning accidents and susceptible dampness syndromes produced during upward tunnelling are prevented; filling pipes are not erected over the stope access, so that overhead operation is avoided, and the filling pipes are omitted; meanwhile, the stope access can be fully filled to the top, and the safety of stope top plates is improved.

Description

technical field [0001] The invention relates to the technical field of layered cemented filling mining methods, in particular to a downward approach layered cemented filling mining method. Background technique [0002] At present, the mining method adopted by Longshou Mine is the hexagonal high entry road downward layered cemented filling mining method, and the filling is filled by self-flowing fine sand pipeline. The stope is an ordinary electric rake hexagonal approach, and the YT-28 rock drill is used for rock drilling, and the electric rake is used for mining. [0003] Such as Figure 1-3 As shown, the stope approach 4 is a vertical layered double-wing arrangement, 24 meters long, hexagonal in cross section, 2.6 meters wide at the top and bottom, 5.4 meters wide at the waist, and 4 meters high. The vertical height of adjacent access roads is staggered by half a layer, that is, 2.0 meters, and the access roads are mined every other, and the height of each mining layer is...

AI Technical Summary

Problems solved by technology

[0005] After the stope mining is completed, the filling small well 3 is dug up at the end of the goaf stope approach 4 to communicate with the vein-piercing main filling road 10, but the rubble that is dug up and filling the small well 3 is difficult to separate, and is directly mixed into the mined stone. In the ore, resulting in the depletion of the ore grade

At the same time, when filling, the personnel should hang the filling pipe in the filling well 3 in advance. Because the environment in the filling well 3 is relatively harsh, it is very dangerous to fill the well 3 up and down.

It is easy for stope operators to dig and fill the small well 3. Generally, when filling, the mortar presses through the waistline of the stope approach 4 and stops filling. Because the filling is not connected to the top, the ground pressure stress is concentrated on the two sides of the approach, which is easy to occur. The two sides of the filling body in stope approach 4 collapsed

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