缓倾斜破碎矿体高效进路充填采矿方法研究与应用

doi:10.11872/j.issn.1005-2518.2021.06.222

Abstract

Abstract:

The orebody in the north area of the -496 m middle section of the No.1 orebody in Dayingezhuang gold mine is a typical gently inclined thin to medium thick orebody，which has the characteristics of small dip angle，large ground pressure and broken orebody.Aiming at the first seam，the point pillar upward flat-back cut and fill method was used to mining the orebody，and the exposed area of the chamber is large，making it vulnerable to collapse.Even if more point pillars were done，poor mining security was still threatening the production safety，and there are shortcomings such as poor operation conditions，low production efficiency and high rate of ore loss.In order to ensure the safety of stope operation，realize high-efficiency production and reduce the ore loss，the small size upward drift backfill mining method was proposed.This method is proposed in consideration of the mining technical conditions，mining status and development needs of Dayingezhuang gold mine，combined with the mining experience and development trend of similar gold mines in Jiaodong Peninsula.Some key problems such as mining technology，blasting technology and roof filling were optimized and improved，and the expected effect was achieved.The industrial test shows that under the condition of the same drilling time and the drilling length are basically the same，the production capacity of the panel is 372 t/d and the monthly ore output is 11 000 t，and the comprehensive ore production capacity is basically the same as the original mining method.Unit explosive consumption was only 0.26 kg/t，28% lower than the original mining method.The ore loss rate is only 5.7%，62% lower than the original mining method，recovery has been significantly increased.By using cemented fills instead of concrete seperation wall，the construction period is shortened from 5.5 days to 2.5 days，effectively solving the problem of drift stope replacement.The new mining method has the benefits of safe and efficient production and meets the requirements of technical and economic indicators.The research results of the new mining method can be used to guide the mine production and provide technical base for the production target of reaching 5 000 t/d.At the same time，it can be used for reference by other similar mines with remarkable economic and social benefits.

Key words: broken orebody, upward horizontal approach layered filling method, mining technology, blasting process, high-efficient mining, filling mining method

CLC Number:

TD853

Hongwei ZHANG,Fuxing ZHANG,Sheng SUN,Zhengcheng GUO. Research and Application of High-efficiency Drift Backfill Mining Method in Gently Inclined Broken Orebody[J].Gold Science and Technology, 2021, 29(6): 899-907.

Figures/Tables 6

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采矿方法	盘区生产能力 /（t·d^-1）	凿岩台效 /（t·台班^-1）	损失率/%	贫化率/%	采切比 /（m·kt^-1）	采矿直接成本 /（元·t^-1）
原采矿方法	384	192	15	6.2	6.4	21.53
小规格上向水平进路分层充填法	372	186	5.7	5.4	16.8	27.81

爆破方案	单机凿岩时间/h	单机凿岩进尺/m	进尺率/%	单位炸药消耗量/（kg·t^-1）	单位导爆管雷管消耗量/（发·t^-1）	单位导爆索消耗量/（m·t^-1）
点柱式	3	121	50	0.36	0.18	0.24
初始方案	3	119	52	0.35	0.23	0.41
改进方案	3	117	46	0.26	0.11	0.53

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Research and Application of High-efficiency Drift Backfill Mining Method in Gently Inclined Broken Orebody

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