Stigesænkning

Stigesænkning, also known as stage lowering, is a process used in mining to increase the efficiency and safety of underground operations. It involves the controlled lowering of the mine's working level or stage, typically by several meters, to access deeper ore bodies or to improve ventilation and drainage. This technique is particularly useful in deep-level mining where traditional methods may not be feasible.

The process of stigesænkning begins with the construction of a new level or stage below the current working level. This new level is supported by pillars or other structural elements to ensure stability. Once the new level is established, the mining equipment and personnel are moved down to the new stage. The old level is then backfilled with waste material, such as rock or tailings, to maintain stability and prevent water ingress.

Stigesænkning offers several advantages. It allows miners to access deeper ore bodies, increasing the overall yield of the mine. It also improves ventilation and drainage, reducing the risk of water-related accidents. Additionally, it can help in the rehabilitation of the mine by allowing for the gradual closure of upper levels.

However, stigesænkning also presents challenges. The process requires significant investment in new infrastructure and equipment. It also involves risks associated with moving personnel and equipment underground. Proper planning, safety measures, and engineering expertise are crucial to the successful implementation of stigesænkning.