Pengzhuang – an example for Backfilling efficiency in Coal Mining Application

Shandong Energy Group has successively built a series of demonstration coal mines for safe and efficient production. The Pengzhuang Coal Mine is owned by Linyi Mining Group Heze Coal and Electricity Co. and is located near Yuncheng, in the west of the Shandong Province.

Penzhuang coal mine paste filling station construction project contract with a total investment of more than 70 million RMB (8.5 Mio. €), covers an area of 2.5 ha and it is designed for an annual filling capacity of 800.000 t.

 

KOS 25.150 with hopper

The construction content includes crushing and screening system, belt conveyor system, storage system, weighing agitator filling system and other key process links, a total of 12 units of engineering.

The project has been under preparation since April 2023. The construction permit for full commencement has been obtained. This project is of great significance in terms of releasing resources during mine construction, reducing cave-in disasters and extending mine life.

It is the first backfilling station construction project in the Juye coal field. When completed, it will play an important demonstration and leading role for other mine filling projects in the surrounding area

The Pengzhuang coal mine
 

The Putzmeister impact for success

Mining operations, particularly coal extraction, require efficient and sustainable methods to ensure safety and structural integrity. One of the critical aspects of modern mining is backfilling, which enhances mine stability and minimizes environmental impact.

 

Hydraulic power unit with protective screen for a higher security

Why Backfilling

Increasing production volumes made it as necessary to find an alternative solution for the resulting tailings to the previous rock filling as did the fact, that there is a lane from a high-speed train track nearby.

The Advantages of Backfilling

Backfilling improves mine stability as well as operational efficiency. It enhances safety, particularly near critical infrastructure like rail lines.

The backfilling material

The available material are cemented coal mine tailings with a dry solids content between 75 – 77%. The maximum particle size is 25 mm. In summary up to 200 m³/h pumpable cemented coal mine tailings will be pumped to the underground with a max. delivery pressure of 100 bar. The assumed filling efficiency is 90%.

The pumping system

To require the necessary volumes Putzmeister calculated a KOS 25.150 High Pressure operated with a HA 2XL 2 x 500 Hydraulic power unit and a SEP 2 control board

View inside the hopper with feeding screw

Hopper attachment installed by the customer

Machines Equipment

Delivery quantity