Filling mining method for slant middle-thick ore body

Abstract

The invention relates to a filling mining method for a slant middle-thick ore body. The method includes the following steps: (1) chamber division; (2) chamber stoping; specifically, each chamber is divided into two mining ranges respectively of a hanging side and a heading side, namely, a hanging side mining range stope and a heading side mining range stope, according to the connecting line between the hanging side vertex and the heading side bottom point for stoping; the heading side mining range stope is preferentially stoped, and then the hanging side mining range stope is stoped; in each stage, the stoping is carried out in the chambers one by one from bottom to top along the ore body; the stoping in both the heading side mining range stope and the hanging side mining range stope includes stope arrangement and three processes, namely, mining, stope ore drawing and chamber filling; the chambers are divided into two mining ranges, the hanging side mining range and the heading side mining range, for mining; the heading side mining range is firstly mined, and after the goaf is filled, the hanging side mining range is mined, so that full recovery of collapsed ores in the heading side mining range stope can be ensured, and untimely falling of the surrounding rock on the hanging side due to crush and mixing-in of a large number of barren rocks on the hanging side are avoided; the hanging side mining range stope is stoped after the goaf of the heading side mining range stope is filled in a high-concentration manner, so that stability of the stope surrounding rock body is improved; by partially controlling the ore drawing, ore piles are reserved in the stopes, so that the hanging side surrounding rock can be effectively supported, an extrusion condition is provided for next blasting, and the blasting effect is improved.

Description

technical field [0001] The invention relates to an underground mining method, in particular to a double-width split mining and segmental filling mining method for inclined medium-thick ore bodies. Background technique [0002] For buried ore deposits with a dip angle of 30°-55° and a thickness of more than 10m, the main mining methods adopted by mines at home and abroad are: (1) Low-section mine method, low-section ore-cutting and high-section Mining room method, comprehensive method, comprehensive room and pillar method. These methods are mainly suitable for stable surrounding rock conditions. When the surrounding rock is broken, especially when the hanging wall of the ore body is not stable, there will be poor production safety and serious problems of ore loss and dilution; (2) upward horizontal layered filling method , Upward approach filling method, downward approach filling method. These methods have strong applicability, but the amount of mining work is large, the pr...

AI Technical Summary

Problems solved by technology

These methods are mainly suitable for stable surrounding rock conditions. When the surrounding rock is broken, especially when the hanging wall of the ore body is not stable, there will be poor production safety and serious problems of ore loss and dilution; (2) upward horizontal layered filling method , Upward approach filling method, Downward approach filling method

These methods have strong applicability, but the amount of mining work is large, the production efficiency is low, and the production cost is high. Especially under the condition of the surrounding rock of the upper wall is broken, the ore rocks frequently fall and the safety of the stope operation is poor; in order to prevent the fall, some The mine had to reserve a large number of permanent interpillars in the stope, and gave up the recovery of some ore bodies near the hanging wall, resulting in an increase in the ore loss rate; (3) using explosive force to move the pre-controlled roof and then fill the deep hole mining method

This kind of mining method has complicated mining process, high production cost and poor ore body adaptability

In summary, due to the small inclination angle of this type of ore body, the caving ore cannot be released naturally by gravity during the mining process, resulting in a large amount of residue in the footwall of the ore body, resulting in a large loss of ore; at the same time, due to the small thickness of the ore body, the mining The working space of the field is limited, and the shallow hole ore falling process is usually adopted, which seriously restricts the production capacity of the mine, resulting in difficulty in selecting mining methods for this type of deposit, a large amount of mining and cutting engineering, difficulties in ore collapse and ore transportation, and low mechanization and operating efficiency. , long production cycle and a series of technical problems, it is recognized as a difficult mining body at home and abroad.

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