Development and prospect of mine hoist

2025-03-14 15:55:01

The task of transporting lifting, materials and equipment is an important piece of equipment that connects the underground and the surface.

China's coal reserves are extremely abundant, ranking among the top in the world, and it is a guaranteed energy source for the sustainable development of China's economy and plays a leading role in China's energy system. China

The annual production volume of mine hoists is mainly related to the demand of coal mines, especially large and extra-large mine hoists.

At present, the depth of coal mining in China is generally less than 800m, and a large amount of coal has not been developed due to being buried more than 1000m underground. With the rapid development of the economy, the society has become interested in

With the increasing demand for energy, deep coal mining has become a problem that the world's major coal mining countries need to face and solve. According to statistics, the depth of coal mining in China is average

It is about 500 m and is developing at a depth rate of 8~12m per year. In the next 10 years, the mining depth of China's mines will reach 10 meters 000~2 000 m.

20th century In the early 80s of the 20th century, German coal mining reached a depth of 1443 meters, and by the mid-80s of the 20th century, there were 79 foreign mines with a depth of more than kilometers. In 1977, I

The development depth of Zhaogezhuang Coal Mine has reached 1154.4.4m, and at present, there are 17 mines in China with a mining depth of more than one kilometer.

When the multi-rope friction hoist is used in deep wells, due to the lengthening of the hoist wire rope, not only the lifting load is increased, but also the wire rope is due to the tension under the conditions of deep well lifting

If the change is too large, its service life will drop dramatically, which has become a major factor restricting the improvement of mine safety and efficiency. The common problem of deep well wire rope lifting is: the wire is broken early

Uneven, the metal section of the wire rope is reduced, the tensile strength is reduced, and the overall breaking force is reduced, so that the service life of the wire rope is short. For example, the copper mine in Tongling Donggua Mountain is raised

The degree is 1 100 m, and the average service life of the wire rope is about 3 months; The lifting height of the main shaft hoist of Zhangxiaolou in Pangzhuang, Xuzhou is 1039.6m, and the average service life of the wire rope

6 months; Therefore, it is not recommended to use domestic multi-rope friction hoists in the case of a depth of more than 1200m.

Generally speaking, for deep well hoisting, segmented hoisting can be adopted, that is, a mature single-rope winding hoist or a multi-rope friction hoist

Mining and technology are easy to implement, but more equipment is required, production management costs increase significantly, and the probability of failure increases; Another method is mining

The use of Brel hoist (i.e., multi-rope winding hoist) can be completed with only one set of hoisting equipment, avoiding the complex operation system and indoor engineering brought by multi-stage hoisting.

Save investment costs.

From 1958 to 2000, South Africa began to use multi-rope winding hoists, which are widely used in South Africa 2 mines with a lifting height of about 000m. The multi-rope winding hoist is a kind of double-rope winding hoist

There is a rope baffle in the middle of each reel, so that each drum is wound with two wire ropes at the same time. The wire rope is wound in multiple layers through the sky wheel

After the installation, 2 wire ropes are connected with the same lifting container. Since it is a tailless rope lifting, the tension of the wire rope will change due to the change of the tail rope during the deep well hoisting process

The impact of excessive on its service life.

The multi-rope winding hoist has a large lifting capacity, a small drum diameter, a double hook hoist can be used for multi-stage hoisting, and a tailless rope device is suitable for extra-deep wells

Improvement and many other advantages solve the problem of wire rope of multi-rope friction hoist in deep well improvement, and change the improvement mode of deep well mining. This improved technology in China

There are certain applications abroad, but the current domestic applications are still blank.

Deep coal resources are an important part of China's energy security, and many mines will enter deep mining in the future; As a result, deep mining will become the mining of the future

The development trend of the industry. Depth enhancement is an important problem that needs to be solved in deep mining. Due to the high stress of kilometer-deep wells and the special high-temperature geological environment, the transportation equipment has been improved

It presents new requirements, but it also presents new challenges for technicians. How to safely and cost-effectively mine and transport deep coal resources will become China's coal mining bank

Major technical issues that the industry needs to break through.

Throughout the development history of elevators in China, from single-rope winding to multi-rope friction, from reducer transmission to direct transmission of motor and spindle, the research and development of elevators

The manufacturing industry has come a long way.

In the past 10 years, domestic elevators have been dominating the domestic market, which is related to price factors and national policies, but also objectively reflects the domestic market

High device dependency. Although the imported equipment is of good quality, the price is high, and users pay more attention to the cost performance of the product. In recent years, the performance and quality of domestic hoists have been improved

The increase in its market share has been boosted.

With the rapid growth of coal production, the demand for mine elevators is also increasing. ABB and SEMAG have established an elevator manufacturing base in China

By reducing manufacturing costs and expanding the domestic market, the competitiveness of the domestic elevator manufacturing industry has been intensified. Product reliability, intelligence, automatic control of multinational companies, etc

It represents the technical manufacturing level of modern lifting equipment, and also encourages the domestic market to upgrade the machine manufacturing industry, change the design concept, optimize the design method, and develop ideas

In order to meet the market demand, we will innovate.

It is worth noting that due to many factors such as China's weak industrial foundation, insufficient technological innovation ability, and backward product technical standards, China's mining machinery manufacturing

The overall manufacturing industry is not strong and lacks international competitiveness. A considerable number of mining machinery manufacturing enterprises can only engage in the imitation of some simple products with low technical level, but can not be engaged in

New product development can only participate in market competition at low prices.

Judging from the current economic operation situation of coal, the demand for coal is affected by various factors such as the slowdown in macroeconomic growth, the advanced construction of coal production capacity, and the growth of imported coal

The demand for elevators has dropped sharply, and the demand for mine elevators has dropped sharply, putting forward new and higher requirements for the elevator industry. In terms of products, first of all, we should always pay attention to market demand

Adjust the product structure in a timely manner to realize the initiative of market competition; The second is to improve product quality, and strive for survival, efficiency and development by quality.

With the continuous improvement of the technical level of mine hoisting equipment, many of the old hoists currently used are relatively backward, and the service time is longer due to the earlier factory time

Long, aging equipment, there are some defects that cannot be ignored, can not meet the relevant provisions of coal mine safety regulations, there are greater safety risks, must be overdue

The service hoist undergoes technical transformation. Some mines require the hoist to be modified on the basis of the existing bearing structure and in accordance with the principle of saving investment costs and reducing production time

Comprehensive technological transformation, the use of new parameters, new technology, new structure, with modern elevators to replace the old elevators.

It is very important for mining enterprises to carry out reasonable technical transformation of old equipment, which is also a way for equipment manufacturing enterprises to expand the elevator market. Meet the technical needs of the mine

Under the premise of requirements, the overall technical water of the equipment should be improved in line with the principles of energy saving, reducing consumption, reducing costs, and improving the safety and maintainability of the equipment

Flat purpose. In addition, the transformation period should be shortened as much as possible to reduce the adverse impact on production.

When carrying out technical transformation of equipment, the mine output, production conditions, service life, transformation cost and installation cycle of different users should be comprehensively considered

In-depth analysis of the use of the machine and detected problems, put forward transformation countermeasures, theoretical verification, in the case of insufficient cost to carry out segmented transformation

How to make it, step by step.

Economic globalization and regional integration are the trend of the times. In the sustainable development of China's economy in the future, with the progress of technology and the improvement of means, new technologies and new knots

With the continuous development of structure, new materials and new processes, the development of mine hoist will also show diversified forms, and its unique performance and advantages will be more perfect

Wide range of applications.

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