## 6 Conclusions  
This study was based on the engineering basis of the No. 3606 panel of the track roadway of the Chaili Coal Mine, which has a thick layer and soft rock mass roof. Using a combination of theoretical analysis, numerical simulations, and field applications, we systematically studied the full anchor cable support of a thick-layer soft rock mass roof in mining roadway technology, drawing the following main conclusions:  
1. Comparing the roof full anchor cable support method to the roof bolt and anchor cable combined support method, theoretical analysis of the support function and effect was performed. The roof's shallow surrounding rock was efficiently restrained from deforming and being damaged by the roof full anchor cable support method, maintaining the roof's structural integrity. Therefore, full anchor cable support of thick soft rock roof was proposed;
2. Numerical simulation analysis and comparison of the support effect of roof full anchor cable support and roof bolt-anchor cable support in the mining process showed a relatively high risk of roof instability due to the deformation of the surrounding rock and plastic failure of the bolt-anchor cable support scheme. The roof full anchor cable support scheme can meet the support requirements;
3. By combining the support experience of the Chaili Coal Mine, the approximate support parameters for the roof and two ribs were determined. Then, nine support schemes were designed for numerical simulations using orthogonal experiments, and the support effectiveness and cost-effectiveness of each scheme were analyzed and compared. Based on the numerical simulation results, the final parameters for the roof's full anchor cable support were determined as follows: the spacing between the roof anchor cable rows was 1200 \(\times\) 1000 mm, and the spacing between the two ribs of anchor rod rows was 1200 \(\times\) 1000 mm;
4. When the roof full anchor cable support scheme was applied in the 3606 track roadway, the average maximum working resistance of the anchor bolts and anchor cables was 53 KN and 124.5 KN, the convergence of roof-to-floor and two ribs displacement was 132.5 mm and 144 mm, and the deformation rate was 3.68% and 3.13%, respectively. The support resistance maintained a stable working status, and the roadway was well stabilized, proving that the thick soft rock mass roof of the mining roadway was well anchored. The adaptability of the full anchor cable support method for thick soft rock roadway roof support and the rationality of supporting parameters were demonstrated.  
This paper only analyzed the thick soft rock roof conditions specific to the No. 3606 track roadway in the Chaili Coal Mine and studied the full anchor cable support technique. However, for thick soft rock roofs under different conditions, there are various types of soft rocks with different deformation and failure mechanisms and varying thicknesses. The adaptability and scope of using full anchor cable support for the roof require further systematic research.  
Conceptualization, writing--review and editing, and supervision: Y.Y.; data curation, formal analysis, methodology, and writing--review and editing: L.M.; software and validation: T.Z.; All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research was supported by the National Natural Science Foundation of China (grant nos. 51574156) and the Natural Science Foundation of Shandong Province of China (grant no. ZR2022 ME195).  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** Data associated with this research are available and can be obtained by contacting the corresponding author upon reasonable request.  
**Conflicts of Interest:** The authors declare no conflict of interest.