## 5 Field Application and Effect Evaluation  
### Monitoring Program  
The purpose of this study is to analyze the effectiveness of the roof full anchor cable support method and the support parameters used in the trackway of the No. 3606 panel. To achieve this, two measurement stations were set up in a representative area of the trackway, one at 220 m and the other at 250 m from the working face. These stations were designed to monitor the roof-to-floor convergence and record the working resistance of the anchor bolts and cables used in the support method.  
The measurement points for the working resistance of the anchor cable were arranged in two measurement stations, labeled as station A and station B, located at 220 m and 250 m, respectively, from the working face in a representative area of the trackway. At station A, two dynamometers, labeled as 1# and 2#, were installed on the anchor cable on the roof, while two dynamometers were installed on the anchors of two ribs: the production rib, labeled as 3#, and the non-production rib, labeled as 4#. Similarly, station B had the same arrangement with dynamometers numbered from 5# to 8#. The bolt and cable dynamometer is shown in Figure 14, with the sensing device on the right and the data  
Figure 13: Variation curve of surrounding rock plastic range in different schemes.  
collector on the left. During the installation of the anchor cable and dynamometer, the installation torque should be no less than 150 N\(\cdot\)m.  
The bolt and cable dynamometer comprised a sensing device and a data collector. During installation, the load dynamometer was placed between the anchor bolt/cable saddle and nut, and the nut was tightened using a torque wrench to apply the specified pre-tensioning force. The data collector was then handheld and aimed directly at the sensor display screen to read the data. The load dynamometer was read once per day for the first 5 days after installation, and then every 3-5 days thereafter. When the monitoring point was within 100 m of the working face, it was observed once a day. Layout plan of anchor bolt and cable dynamometer as shown in Figure 15.  
The rock displacement monitoring scheme depicted in Figure 16 involves four measurement points at each station arranged around the roadway layout. These points are used to monitor the distance between A and B and between C and D. To set up each measuring point, a 0.5 m deep, 29 mm diameter borehole should be drilled into the coal and rock mass. Then, a 0.53 m long, 22 mm diameter threaded steel bar should be inserted into the center of the borehole and anchored in place with an anchoring agent. The steel bar should protrude by 30 mm, while the steel bar at the floor measuring point does not need to be exposed.  
Figure 14: Bolt and cable dynamometer.  
Figure 15: Layout plan of anchor bolt and cable dynamometer.  
The displacement monitoring method used involves the use of a handheld laser rangefinder to measure the distance between points A and B and between points C and D. From the initial measurement, subsequent movements of the roof, floor, and two ribs were calculated. The first measurement was taken one day after the layout of the measurement points was completed, and data were collected once a day for the first five days. Afterward, measurements were taken once every three to five days. When the measurement point was within 100 m from the working face, observations were conducted once a day, and when the measurement point was within 50 m from the working face, observations were conducted twice a day.