Abstract
With the development of science and technology, backfill technology has made continuous progress, and the traditional backfill method is no longer suitable for various complicated practical engineering situations. Therefore, researchers in the field of backfill mining have gradually shifted their research focus to the study of high-concentration backfill, and Chinese researchers are no exception. In order to solve the problems caused by the traditional backfill method, China began to vigorously develop high-concentration backfill in recent years, and achieved a lot of results. In this paper, some important achievements made by Chinese researchers on high-concentration backfill in recent years are reviewed; it also presents a summary report of the latest research results from several key laboratories across China. Therefore, this paper reviews the development progress of high-concentration backfill China has made, of which the main contents include: (1) research progress of the high-concentration backfill theory in China; and (2) research progress of high-concentration backfill equipment in China. Finally, we claim that this paper serves just as a guide to start a conversation, and we hope many more experts and scholars will be interested and engage in the research of this field.
Highlights
IntroductionThe development process of backfill mining and backfill technology in the world can be roughly divided into the following three stages: 1. The first stage (before 1900): Water and sand backfill
The development process of backfill mining and backfill technology in the world can be roughly divided into the following three stages: 1. The first stage: Water and sand backfill.In 1864, a coal mining area in Pennsylvania in the United States carried out the world’s first water-sand backfill experiment to protect a church from subsidence and collapse.Subsequently, South Africa, Germany, Australia and other countries have tested and successfully used the sand backfill process
High-concentration backfill is a very broad concept, and the backfill slurry with a mass concentration of more than 60% and s bleeding rate of less than 10% belongs to the category of high concentration
Summary
The development process of backfill mining and backfill technology in the world can be roughly divided into the following three stages: 1. The first stage (before 1900): Water and sand backfill. The development process of backfill mining and backfill technology in the world can be roughly divided into the following three stages: 1. Tong-lu-shan Copper Mine, Zhao-yuan Gold Mine, Fan-kou Lead-Zinc Mine and other mines began to use sand backfill process to treat goaf [6,7]. More than 60 non-ferrous, black and gold mines, such as An-qing Copper Mine, Zhang-ma-tun Iron Mine and San-shan-dao Gold Mine, have built graded tailing backfill systems During this period, the cemented backfill process and technology with natural sand and rod grinding materials as aggregate has become mature, and has been popularized and applied in more than 20 mines such as Fan-kou Lead-Zinc. The high-concentration backfill technology to reduce the backfill water began to be widely accepted by people quickly, and was put into use in Sustainability 2022, 14, x FOR PEER REVIEW such as stope dehydration. (2) Research progress of high-concentration backfill equipment in China
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