Method of refill spent mining field using city solid garbage

Abstract

A method for using the solid garbage coming from city to fill the rejected mining pit includes such steps as classifying, pulverizing, dewatering, compressing to become blocks, stacking in said rejected mining pit which has been pretreated, and covering with soil.

Description

technical field [0001] The invention belongs to methods and technologies for comprehensive environmental management, in particular to a method for backfilling abandoned mining sites with urban solid waste. Background technique [0002] As we all know, urban garbage is a major public hazard that damages the quality of the urban environment, endangers the physical and mental health of residents, and hinders the sustainable and coordinated development of the social economy and the ecological environment; Collapse, rock formation and surface movement, cracking and subsidence are a major disaster that endangers industrial and agricultural production and the safety of people's lives and properties. Facing the ever-increasing and increasingly serious urban waste hazards, the conventional solution is to effectively control the source of waste generation, promote the classified recovery of renewable resources in waste, convert and utilize potential resources ...

AI Technical Summary

Problems solved by technology

Judging from the current situation, due to the large one-time investment of incineration to build a plant, the high operating cost, the low fertilizer efficiency of composted fertilizers, and the great harm of dioxins and residual substances, countries around the world use incineration and composting to treat them. Garbage is less than 15% of the total amount of garbage generated, and a large amount of domestic garbage is still disposed of by landfill or exposed stacking; in the face of the increasingly serious problem of abandoned stopes, the commonly used treatment methods: in addition to effective filling (replacement) In addition to mining methods, it is support and reinforcement, or backfilling with waste rocks and waste materials. However, due to the high operating cost and complicated process, it is difficult to do it in practice, especially for iron and coal with large quantities and wide areas and low value. As far as the development of mineral resources such as phosphate and phosphorus is concerned, it is even more difficult to do so, which makes the ever-increasing urban garbage and the increasing number of abandoned mining sites become harmful to the ecological environment and harm the sustainable and coordinated development of the social economy and the ecological environment. factor