Method for filling and mining after ore caving

Abstract

The invention discloses a method for filling and mining after ore caving, which includes the following steps: exploiting; mining quasi work; cutting work: including excavation of mine collection trench and patio cutting, cutting a patio at one end portion of a rock drilling chamber, cutting the patio by using a vertical deep hole ore falling stage chamber method, and enabling patio cutting to provide sufficient compensation space for actual mining; chamber extraction work: constructing a downward blasthole in the rock drilling chamber, filling and blasting, one-time blasting charging at the entire middle section height of the blasthole, and enabling blasting to adopt one-time lateral blasting and ore removal; filling and maintaining: closing all outlets communicated with a lower mine of the empty area, burying strainer pipes, leading in filling pipelines from the upper portion of the chamber, and filling and maintaining the chamber; and pillar recovery: recovering pillars after filling and maintaining the chamber, and the pillar recovery is the same as the chamber extraction work. The method for filling and mining after ore caving is high in recovery rate of mineral resources, small in blasting impact effect, low in cost and high in production efficiency.

Description

technical field [0001] The invention relates to a mining method for non-coal mines, in particular to an ore body with moderate or above solid ore and surrounding rock, a thickness greater than 30 meters, and an ore body mining method with an inclination angle greater than 55° and a thickness not less than 20 meters. Background technique [0002] Non-coal mines, such as mining metal ores, radioactive ores, and mines used as petrochemical raw materials, construction materials, auxiliary raw materials, refractory materials, and other non-metallic minerals (except coal). Non-coal mining projects are divided into four steps from construction to production: development, mining, cutting and mining. [0003] 1) Exploitation: Excavating a series of shaft and roadway projects from the surface (such as one or more combinations of adit, inclined shaft, vertical shaft, and ramp) to access the ore body, so as to establish a connection between the surface and the underground blocks to be m...

AI Technical Summary

Problems solved by technology

Compared with the first method of ore extraction in the middle section of the non-local section, although the ore recovery rate has increased to 69.2%, a new slip shaft is added, and the second ore extraction method of the non-local section needs more development A middle section, the production period is greatly extended

[0011] In addition, the common VCR subsequent filling method is mostly downward collapsing, which is difficult to charge and takes a long time; and the impact force on the lower triangular ore pillar during blasting is large and the damage is serious; the blast smoke generated by blasting remains inside the mine for a long time , can only spread to the upper rock drilling chamber through vertical blast holes, threatening the life safety of rock drilling workers

In the case of segmental mine collapse, each blast hole at the same section height needs to be charged multiple times and blasted multiple times. After each blasting, the top of the blast hole will be damaged by the impact. The blasting personnel need to clean the top of the blast hole repeatedly. It consumes a lot of man-hours and blasting materials, resulting in high cost and low efficiency

In addition, the pot-hanging method or common method used in the existing VCR subsequent filling method requires special equipment and personnel. For example, the pot-hanging method requires special pots and shallow hole rock drills. Drilling with tanks, and another driver for hanging tanks is required; shallow hole rock drills, rock drilling and blasting personnel for construction of patios, and patio support erection personnel are required for common method construction of patios, which has low production efficiency and poor operation safety; , you need specialized personnel and equipment, and the purchase price of the equipment is relatively high. In addition, the cost of drilling into the well is also relatively high

At present, there are two commonly used drilling methods for cutting patios: the first is to erect scaffolding and platform slabs, use YSP45 shallow hole rock drills to drill rocks, blast multiple times, and concentrate slag in the lower part. This method has poor working conditions and labor intensity. large, high risk, and low production capacity; the second is to use raise drilling, which has good safety and high production efficiency, but the price is relatively expensive

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