What are the conditions for open-pit mining?
The conditions for open-pit mining included the following aspects: First, the coal seam must be continuous and stable to ensure that there would be no safety problems such as collapses during the mining process. Secondly, the stripping ratio needed to be appropriate, which was the ratio of the amount of soil and rock that needed to be stripped to the amount of ore mined per ton of ore. In addition, the comprehensive mining technology of the open-pit coal mine also needed to meet the mining conditions. In addition, mining open-pit coal mines also required a series of qualifications, including business license, mining license, safety production license, land certificate, and so on. At the same time, he also needed to apply for an environmental impact assessment report, approval documents from the environmental protection department, and a pollution discharge permit or pollution discharge registration form. Finally, the mining of open-pit coal mines also required the selection of appropriate mining methods according to the distribution of the deposit, such as continuous mining, intermittent-continuous mining, and intermittent mining.
Open pit mining method
The open-pit mining method mainly included the technological processes of drilling, blasting, mining, transportation, and rock discharge. Piercing work was the primary process of open-pit mining. It was done by a down-the-hole drill or a roller drill to control the ore grade and improve the blasting quality. Explosions were used to blast rocks or rock formations to facilitate subsequent mining operations. Mining and transportation was the transportation of ore from the open space to a designated location. It was usually operated by excavators, cars, electric vehicles, and other equipment. Rock removal was to remove the rocks or rock layers produced during the mining process to maintain the unobstructed flow of the mining area. The open-pit mining method has the characteristics of large mining space, excellent working conditions, high labor productivity, and low mining costs.
Open pit mining process
The mining process of open-pit mines included drilling, blasting, shoveling and loading of ore (rock), transportation of ore and rock, and discharge of rock. Piercing was the primary process of open-pit mining. Its purpose was to provide holes for blasting to store explosives. The quality of the piercing was directly related to the efficiency of the subsequent blasting, mining, crushing, and other work. There were two methods of piercing: thermal piercing and mechanical piercing. Commonly used drilling equipment is divided into shallow hole drill (rock drill and rock drilling jumbo) and deep hole drill (roller drill and down-the-hole drill) according to the depth of drilling. Explosions were the key to the mining of open pits. The rocks were broken through explosions to facilitate the subsequent mining and transportation. The shoveling of ore (rock) was to load the blasted ore or rock into a transportation tool, such as a truck or a conveyor belt. The transportation of ores and rocks was to transport the shoveled ores or rocks to a designated location. The common transportation methods were trucks and tape conveyor. Rock discharge was to discharge the ore or rock from the transportation tool for subsequent treatment or processing. In general, the open-pit mining process was a continuous process, and each link played an important role.
Open pit mining methods and methods
The mining methods of open-pit mines included mechanized mining methods and non-mechanized mining methods. Mechanized mining methods mainly used mechanical equipment for mining, such as excavators, cars, electric vehicles, bulldozers, etc. The non-mechanized mining method used manpower or a combination of human and animal power to mine. According to the stope form of the stripping material, there were mainly pit mining methods and in-place mining methods. Pit mining methods included top-down mining, stone mining, spiral drilling mining, water jet mining, etc. In-place mining methods included in-place extraction mining. According to the location where the stripping was discarded, it could be divided into inner discharge mining method and outer discharge mining method. Internal drainage mining methods included toppling mining and digging mining. According to the mining technology, open-pit mines could be divided into mechanical mining and hydraulic mining. The hydraulic mining was only suitable for mining soft deposits, while mechanical mining was a widely used mining method in open pit mines.
What are the conditions for a mining license?
The mining license required the following conditions: enterprise qualifications, including the business license of the enterprise legal person, tax registration certificate, organization code certificate and other basic certificates; special qualifications, such as mining license, safety production license, etc.; technical personnel qualifications, which required a certain number of technical personnel with professional backgrounds, such as mining engineers, registered safety engineers, etc.; safety production conditions, which ensured the safety of the mining process. The specific application for the mining license also needed to be applied for and approved according to the relevant laws and regulations of different mineral resources and regions.
What does it mean to open a new pit in the novel?
Creating a new plot in a novel usually referred to the author starting a new storyline based on the existing plot of the novel and forming a new storyline. The purpose of creating a new pit was to give readers a fresh reading experience, make the story more colorful, and at the same time, bring more inspiration and motivation to the author. Usually, a new story would be more interesting than the existing one and attract the readers 'interest. It might continue the development of the existing story or continue to be written on the basis of it. However, there might be some problems with creating a new story. For example, the author might make negligence, mistakes, or shortcomings in the creative process, causing the new story line to be incoherent or incomplete. In addition, new works might also affect the progress and ending of existing works, causing unnecessary trouble for readers.
What does it mean to open a new pit in the novel?
A new plot in a novel usually meant that the author suddenly stopped writing and started a new story at the climax of the novel. The new story usually had some connection with the previous story, but it would also change a lot. This style of writing was usually used to make the novel more colorful, and sometimes to make the readers feel fresh. However, there were also times when authors would create a new scam just to make money, not caring about the quality of the novel.
What does it mean to open a new pit in the novel?
In novels, creating a new trap usually meant that a new storyline or character setting would form a new storyline and bring a new experience to the readers. Sometimes, a new trap would suddenly be opened to allow the character to continue developing, and the plot would also unfold. Doing so could surprise and anticipate the readers, and at the same time, help them. However, sometimes a new plot could be created because they needed to take a break or reimagine the story. Under such circumstances, opening a new pit could also be seen as a kind of creative adjustment. New traps in novels could bring new surprises and experiences to the readers as well as help them.
What does it mean to open a new pit in the novel?
In novels, creating a new plot usually referred to creating a new plot or unfolding one of the plots and starting a new chapter. This kind of behavior was often seen as a continuation of an existing work or a continuation of a reader, so it was often called a scam or a continuation. It was a common phenomenon to create a new plot, character, and plot in the process of writing a novel, and to reimagine the entire story line. This kind of behavior could also attract more readers to pay attention to their works. Of course, there were some. No matter which method he chose, it would be a loss for him.
Mining
There were many options for mining, including exploit, mine, extract, and so on.
Mining
Mining referred to the act of digging or taking action, especially the digging of minerals or the extraction of underground resources. For example, oil mining, coal mining, and so on. The mining process involved digging ditches and culverts. Green mining was a theoretical basis. It focused on the rules of joints, fissures, and separation formed by the movement of key layers in the rock formation after mining, as well as the laws of gas and underground water infiltration in the broken rock formation. The main contents of the green mining technology included water-preserving mining, mining under buildings and layer separation by injection to reduce settlement, strip and filling mining, coal and gas co-mining, coal tunnel support and underground disposal of some waste rock, underground coal vaporizing, etc. In short, mining referred to the process of digging or taking action to obtain minerals or underground resources.