Technical Status and Application of Filling Mining Method
Release time:
2018-11-02
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Current Situation and Application of Filling Technology
To understand the current situation and application of filling mining method technology, first of all, we talk about the current situation of domestic mining of mineral resources.
1. Deep mining: surface resources are gradually withering,
2. Complex conditions: easy mining and reduction, most of the current mining bodies are complex and changeable, and the number of ore bodies near towns and cities is increasing.
3. Environmental pollution: a large number of mining waste surface accumulation of serious pollution
4. Strict policy: the government on environmental protection, production safety requirements are getting higher and higher
Secondly, mining, there is tailings emissions, let's list the domestic tailings emissions status, as of 2015, tailings about12000Multiple, tailings stockpiled up110More than 100 million tons,2015year, with emissions greater12Billion tons and this number is still growing at a high speed. According to the relevant information, China's historical mined-out volume of more250billion cubic. equivalent to the capacity of one Three Gorges Reservoir
According to the above figures, then, the small editor to give you an analysis of the current domestic generally adopted three major mining methods:
The first is the open field mining method: this mining method, leaving a large number of permanent pillars, resulting in a large loss of mineral resources.
The second is the caving mining method: this mining method will bring surface subsidence, disaster and environmental damage serious.
The third is the filling mining method we are talking about today. This mining method is to backfill the surface accumulated waste underground and deal with the empty area, thus greatly improving the safety degree of mining operation, increasing the recovery rate of deep resources by 30%, solving the environmental pollution caused by surface accumulated waste and realizing green mining.
So what are the advantages of filling mining method?
First: supporting role, supporting rock strata, protecting surface objects
Second: improve the overall efficiency, improve the recovery rate, reduce the poverty rate, reduce labor costs.
Third: fire prevention, improve ventilation efficiency, prevent high sulfur deposit fire
Fourth: improve the deep operating conditions, control the deep well mining rock burst, reduce the deep ground temperature
Fifth: protect the environment, deal with solid waste, protect the surface environment
What are the economic advantages of filling mining method?
The comprehensive cost of filling is about 25~35 yuan./t(equivalent to raw ore):
The one-step cementation filling ratio is about 40%, and the cost40~50Yuan/t;
Two-step non-cemented filling accounts for about 60%, cost10~20Yuan/t.
Filling system investment is about 800~30 million yuan: a one-time investment, mainly for deep cone thickener, paste pump and other core equipment investment, operating costs are mainly electricity, the cost is very low.
Note: The above documents refer to Professor Chen Qiusong's speech PPT of Central South University.
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