A Strip Wet Filling and Roofing Mining Method

A technology of wet filling and mining method, applied in the fields of filling, ground mining, mining equipment, etc., can solve the problem of unsuitable mining of phosphate rock, and achieve the effect of ensuring economic feasibility, improving safety factor, and reducing the amount of cemented filling

CN112127889BActive Publication Date: 2022-04-22HUBEI SHANSHUYA MINING SCI & TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-04-22

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Abstract

A strip wet filling and roofing mining method, which specifically includes: 1) construction cutting and section roadway; 2) construction of filling and unloading yard; 3) construction of bottom roadway; 4) construction of bottom roadway at the same time of wet filling and roof connection ;5) Mining the intercolumns and pulling the bottom, and performing wet filling at the same time; 6) Backfilling the intercolumns with dry material, and constructing the bottom roadway at the same time; 7) Mining the intercolumns again and pulling the bottom, and performing wet filling at the same time; 8) Sequential cycle operation , Multiple security channel recovery. The present invention adopts the above-mentioned method, fills with dry and wet filling strips at intervals, ensures that the safety exit is continuously advanced with the advance of withdrawal, always ensures that the safety exit does not exceed three rows of ore pillars in the mining area, and improves the safety factor of the safety exit; The mining and filling operations are carried out in different areas at the same time, avoiding cross operations, and the recovery efficiency of the mine room is doubled; the size of the bottom roadway is controlled and does not penetrate the structure, which improves the filling efficiency.
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Description

technical field

[0001] The invention relates to the field of filling and mining, in particular to a strip wet filling and roofing mining method. Background technique

[0002] Filling mining can be divided into two categories, one is ordinary room-and-pillar method subsequent filling, that is, goaf is mined according to the room-and-pillar method, and then the goaf is backfilled, and the filling is a single goaf control filling. The other is to pour the filling body to support the roof and replace part or all of the original ore pillars. This filling not only controls the ground pressure, but also effectively improves the resource recovery rate.

[0003] The pouring filling body mainly includes waste rock cemented filling, full tailings cemented filling and paste filling at this stage. Full tailings cemented filling and paste filling take the construction of large ground filling stations as the main development trend, and the investment is relatively large. The filling cost...

Examples

Embodiment 2

[0041] On the basis of Embodiment 1, in step 1), the distance between two adjacent segmented roadways 2 is not greater than 50 meters. The distance between the sub-section roadways 2 is controlled to be no more than 50 meters to achieve the purpose of controlling the distance between the filling material unloading site 3 and the working surface, reducing the filling material transfer distance, and improving the filling efficiency.

Embodiment 3

[0043] On the basis of Example 1, in step 3), the two ends of the first bottom-drawing roadway 4 respectively extend into two adjacent excavation units, and both ends of the first bottom-drawing roadway 4 do not penetrate through, wherein A 1.5m rear pillar is left at one end. The non-penetrating method is used to construct the bottom roadway, which avoids the pouring of retaining walls, reduces the amount of cemented filling, and improves the filling efficiency.

[0044] In a preferred solution, the length of the columns 6 between the two strips is controlled to be 30-40 meters, and the width is controlled to be 3-3.5 meters.

[0045] The bottom-drawing roadway is 3-3.5 meters wide, which controls the filling volume of the wet strip, reduces the bottom filling cost, and ensures the economic feasibility of the filling mining plan; it is 30-40 meters long to ensure the filling efficiency, and at the same time controls the 6 columns between the strips The recovery period ensure...

Embodiment 4

[0047] On the basis of Example 1, the strip column 6 between the second first bottom-drawing roadway 4 and the third first bottom-drawing roadway 4 is mined and runs through the mine house to form a safety exit without backfilling. In this way, the safety exit is continuously advanced with the advancement of mining, and it is always ensured that the safety exit does not exceed three rows of ore pillars in the mining area, and the safety factor of the safety exit is improved.

[0048] In this application, the raw materials for the wet filling material are the waste rock produced in the shaft, the tailings of the ore dressing plant and the machine-made sand as the main aggregates. The raw materials are cheap and the solid waste can be reused. With 100kg cement per cubic meter, the comprehensive strength of the filling body is 4-6MP, and the comprehensive filling cost is 100-120 yuan / m 3 .

[0049] The filling process adopts the filling process of mixing on the ground, truck tra...