|
| Study on the support technology of broken roof of layered clay rock in bauxite |
|
Received:December 07, 2019
Revised:December 14, 2019
Accepted:December 17, 2019
Published Online:July 16, 2020
|
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:bauxite; clay rock; cracked roof; support technology; anchor cable steel belt + steel mesh coupling support |
| Author | Institution |
| HUANG Dan |
BGRIMM Technology Group |
| YU Shibo |
BGRIMM Technology Group |
| QIN Xiushan |
BGRIMM Technology Group |
| CHEN He |
BGRIMM Technology Group |
| WANG Chang |
ShanXi Hua-xing Aluminum Industry Co,LTD,Shanxi Lvliang |
| ZHANG Yaoyao |
ShanXi Hua-xing Aluminum Industry Co,LTD,Shanxi Lvliang |
|
| Hits: 1852 |
| Download times: 916 |
| Abstract: |
| The ore body of Shanxi bauxite is stratified and stratiform-like with gentle dip. The orebody direct roof is mainly broken clay rock. The deformation and failure characteristics of typical roadway in the vein are mainly characterized by the roof of the broken bauxite caving zone with low strength claystone caving. This paper is based on the engineering geological conditions of the broken roof of layered claystone in bauxite. FLAC3D simulation software was used to analyze the deformation and failure process of roadway under the original support and obtain the mechanical mechanism of roadway deformation. According to the mechanism of deformation mechanics, two support schemes were developed and compared. The typical support scheme anchor cable steel belt + steel mesh coupling support (anchor cable 7m long, triangular arrangement and 2m×1.6m mesh) was determined. The anchor cable was fixed in the main roof. Pre-tensioning force was applied to make the steel ladder, mesh and anchor cable laid on the surface of the roof form a whole, and the integrated support ability of suspension, pretension and protection was brought into full play. The field implementation showed that the coupling support technology with anchor cable + steel mesh + steel ladder can meet the support requirements of the bauxite clay rock roadway. |
| Close |
|
|
|