Long-distance automatic pipe folding covering rock grouting method based on sill-pillar-free sublevel caving method

Abstract

The invention relates to a long-distance automatic pipe folding covering rock grouting method based on a sill-pillar-free sublevel caving method, and aims to solve the grouting problems of long-distance and position change of covering rock grouting in the sill-pillar-free sublevel caving method. Automatic pipe folding grouting pipes are pre-buried on the two sides of the bottom of a stoping roadway, and along with stoping of each caving step pitch, in the ore rock falling process, one section of each grouting pipe can be automatically broken, and the grouting outlet of each grouting pipe is automatically adjusted to the position where grouting is needed, so that covering rock grouting is facilitated, operation is convenient, implementation is easy, and finally the purpose of efficient ore drawing under the grouting covering rock is achieved.

Description

technical field [0001] The invention belongs to the technical field of caving mining methods in underground mines, and relates to a long-distance automatic pipe-folding overburden grouting method of the segmental caving method without bottom pillars. Background technique [0002] Pillarless segmental caving method has the advantages of simple process structure, high mining intensity, high efficiency, high degree of mechanization, safety, and low mining cost, and has been widely used in the world. [0003] The standard non-pillar segmental caving method is to divide the ore body into several stages, and then divide the stages into several segments with mining roadways, and carry out mining segment by segment from top to bottom. Segmented rock drilling, ore-breaking and ore-extraction work are carried out in the mining roadway from the end of the mining roadway to the entry end of the mining roadway, and a smaller ore-breaking step is mined at a time. The ore-breaking step is ...

AI Technical Summary

Problems solved by technology

[0004] The caving ore is drawn under the overburden rock. Due to the direct contact between the ore and the rock, the ore will be mixed with the rock when it is released, resulting in a large loss of ore in the ore. The solution of the problem is a major problem in the mining industry

[0006] The non-pillar segmental caving method needs to grout the overburden rock above the mined ore body, and the upper segment can only be grouted for the lower segmental overburden rock. Due to the safety requirements of the non-pillar segmental caving method, the upper segmental Mining must be advanced by more than 20m in subsections, or mined layer by layer. The grouting position has been covered by overburden rock, and people cannot enter the grouting position. Because of the non-pillar segmental caving method, only a small caving step is mined at a time. , with the recovery of each caving step, the grouting position needs to change each time, therefore, the overburden grouting of the sub-column method without pillars is a grouting problem in the closed area of ​​overburden, long distance, and position change , is a big problem

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