![]() ![]() More importantly, a self-bearing system, which includes self-designed H-steel beams, H-steel brackets, and self-locking anchor cables, was proposed and constructed to bear the whole weight of the bunker. The FLAC3D program was adopted to study the stability of the rocks surrounding the new bunker, and an optimized reinforcement scheme was determined. Then, a new wall-mounted coal bunker (WMCB), without building the CFC, is proposed. The results indicate that the intrusion of water weakens the strength of the floor rock and causes significant expansive forces thus, large deformations and tensile failure occur first in the floor, further causing shearing and tensile damage of the reinforced column and even overall instability of the CFC. ![]() Based on the serious CFC collapse case at Xiashijie mine, China, this work analyzed the deformation characteristics, main influencing factors, and failure mechanisms of the CFC using a FLAC numerical model. Moreover, there is no report on the construction of bunker without a CFC, especially under such weak floor-rock conditions. Floor-heave control is a complex problem and is still not well-solved. However, maintenance of CFCs within soft, swelling floor rock is a challenge faced in underground coal mines. In traditional vertical coal bunker systems, a coal-feeder chamber (CFC) must bear the whole weight of the bunker. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |