Upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method

Abstract

The invention provides an upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method. The method includes the following steps that panels are divided in the ore direction, a stope preparation system is arranged, upward fan-shaped medium-depth blast holes are drilled from one side to the other side of a chamber, the blast holes are filled with explosives for detonation, and an undercut space is formed after detonation; cut grooves are formed through a VCR method, and as for ore above the undercut space, downward vertical deep holes are drilled in a drilling chamber at the top of the chamber, and the holes are filled with explosives for detonation with the cut grooves as a compensation space; the chamber in each panel is subjected to two-step backstoping, after ore removal of a first-step chamber is finished, the first-step chamber is filled with cementing materials, after the first-step chamber is filled and cured, a second-step chamber is subjected to backstoping, the backstoping steps of the second-step chamber are the same as those of the first-step chamber, and the second-step chamber is filled with cemented filling bodies and non-cemented filling bodies; and the steps are repeated in this way till backstoping of all chambers are completed. The upward and downward staged rock drilling, sublevel bottom cutting and ore removal subsequent backfilling mining method has the advantages that the rock drilling efficiency of the upward fan-shaped medium-depth blast holes is improved, the waste hole rate is lowered, efficient and safe bottom ore removal is achieved, and the mechanization level is high.

Description

technical field [0001] The present invention relates to a mining method of stage emptying and then filling, and more specifically, relates to a mining method of up-and-down-stage rock drilling, segmental bottom cutting and mining, and then filling. Background technique [0002] At present, there are many mining methods suitable for gently inclined to inclined thick large ore bodies, including upward layered filling method, segmented empty stop and then fill mining method, and stage open stop followed by fill mining method. Point-pillar upward layered filling method, etc., its advantages are mainly good adaptability to ore body occurrence conditions, easy removal of rock inclusions, low mixing rate, small exposed area of ​​hanging wall, and easy control; but this method has production The capacity is not high, the safety of man-machine operation in the open field is threatened, and the concentricity of the point column is high, the production links are interlocking, and the p...

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Problems solved by technology

Point-pillar upward layered filling method, etc., its advantages are mainly good adaptability to ore body occurrence conditions, easy removal of rock inclusions, low mixing rate, small exposed area of ​​hanging wall, and easy control; but this method has production The capacity is not high, the safety of man-machine operation in the open field is threatened, and the concentricity of the point column is high, the production links are interlocking, and the production management requirements are relatively strict. It is not recommended to use this method to mine thick and large ore bodies.

[0003] Subsection empty field followed by filling method, the cutting volume of the roadway is large, and too much ore cannot be left after the ore falls to support the surrounding rock or filling body. The exposed area of ​​the empty field is relatively large, and the time is long, which is not conducive to the second The surrounding filling body is stable during the step-by-step recovery, and the working points of the equipment are scattered in the vertical direction, the ventilation is not easy to manage, the equipment is frequently mobilized, and the efficiency is difficult to exert

[0004] The main advantage of the stage empty field and subsequent filling method is that neither man nor machine works in the empty field, which is relatively safe, and this method is easy to realize high-level mechanization, simple process, less process constraints, and large production capacity. The adaptability to the occurrence conditions is poor, the inclusion rate of rocks is not easy to remove, the mixing rate is high, the ore mining grade is low, and the requirements for the top quality and self-supporting strength of the filling body are high, etc.

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