The XVIII International Conference on Mine Surveying

292 / 2023-10-11 11:05:16

New Technology of Interlayered Filling Reclamation of Coal Mining Subsidence Land with Yellow River Sediment

mining subsidence land,soil reconstruction,soil water,filling technique,filling reclamation

Filling reclamation is an effective way to increase the amount of farmland. The existing reclamation technology adopts one－time filling measures, which leads to a classic two-layer soil profile pattern with "soil layer+ filling material layer". As covering soil is insufficient, the productivity of reclaimed farmland is usually low. This paper put forward a multi-layered soil profile pattern with inter-layers of filling materials. Taking filling reclamation of subsidence land with Yellow River Sediments as an example, this study analyzes the principles and methods of inter-layer reclamation. The results show that: Adding a soil layer as an inter-layer in the filling material layer could improve the moisture and nutrition situations of the filling material, overcome the disadvantages of a two-layer soil profile pattern with "soil layer+ filling material layer", and increase the quality of reclaimed farmland. An alternate multilayered multi－filling method for soil reconstruction with reclaimed mining subsidence was proposed. The continuous construction technology of multilayered soil profile reconstruction is realized through the alternate filling process, multiple filling, and soil backfilling. Practices were carried out in the Qiuji Mine of Shandong Province. Interlayer soil profile pattern has a certain influence on wheat output. The wheat outputs of some profile patterns are higher than those of the control group.