Open limestone mining method applied to environmental protection and dust fall

Abstract

The invention discloses an open limestone mining method applied to environmental protection and dust fall, and relates to the technical field of mining. The open limestone mining method comprises the following steps that S1, perforating operation is carried out, a wet type operation method is adopted, a high-pressure water spraying device is additionally arranged, high-pressure water is injected through the center of a drill rod during rock drilling, so that dust in a blast hole is wetted and becomes slurry, and then the slurry is blown out by high-pressure airflow blown into the center of the drill rod. According to the open limestone mining method applied to environmental protection and dust fall, a BSD foam dust suppression system is adopted, dust removal management work can be simplified, the whole dust removal system can be easily controlled by a central control room as long as water and compressed air are conveyed to all dust production points, dust removal is not needed in the dust suppression technology, secondary pollution is avoided, so that the working condition of dust removal management personnel is improved, the dust suppression system occupies a small space, the effective space in a plant can be saved, the capital construction investment is reduced, and the dust removal operation cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to an open-pit limestone mining method applied to environmental protection and dust reduction. Background technique [0002] my country is one of the countries with the richest limestone resources in the world. According to the statistics of the Geological Center of the former National Building Materials Bureau, the distribution area of ​​limestone in my country is 438,000 km2, and the limestone resources that can be used as cement raw materials account for about 1 / 4 of the total resources. -1 / 3, currently there are 7,000 to 8,000 limestone deposits discovered, of which 1,286 have proven reserves, with a total of 54.2 billion tons of ore reserves, of which limestone reserves are 50.4 billion tons, accounting for 93%. The main cement The raw material is limestone, which is second only to coal in Class A mineral products. The amount of limestone used for cement production alone is as hig...

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Problems solved by technology

[0002] China is one of the countries with the richest limestone resources in the world. According to the statistics of the Geological Center of the former National Building Materials Bureau, the distribution area of ​​limestone in China is 438,000 km2, of which it can become The limestone resources of cement raw materials account for about 1 / 4-1 / 3 of the total resources. At present, there are 7,000 to 8,000 limestone ore spots discovered, of which 1,286 have proven reserves, and a total of 54.2 billion tons of ore reserves are preserved. , of which limestone reserves are 50.4 billion tons, accounting for 93%. The main raw material of cement is limestone, which is second only to coal in Class A mineral products. The amount of limestone used for cement production is as high as 1.1 billion tons every year. At present, China The mining method of limestone mines is mainly open-pit bench blasting mining. With the rapid development of industrial construction, traditional mining methods can no longer meet the increasing demand for limestone mines. The progress of society and the development of science and technology have also made the mining industry to Large-scale and intelligent equipment, continuous mining, automatic operation, digitalization of resources, harmless and unmanned mining, etc.

[0003]The blasting operation of open-pit mining field and the mining and loading operation of large-scale mining equipment will generate a lot of dust, which will bring dust pollution. Dust pollution has always been one of the environmental protection problems in open-pit mines. It is a difficult problem. It not only reduces the air quality of the work area and its surrounding environment, endangers the health and life safety of workers, but also damages machinery and equipment, causing various accidents, thereby affecting the economic benefits of production and enterprises. Therefore, it is reasonable It is of great significance to the production and construction of mines to prevent and control dust pollution locally and minimize its harm.

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