Experiment and Application of Coalcrete on Roadway Stability: A Comparative Analysis

Table 6

Comparison of various support cases.

Cases	Support materials
	Coalcrete (mm)	Shotcrete (mm)	U-shaped shed	Rock bolts
Case 1^a	—	100	Used	Used
Case 2^b	300	50	—	—
Case 3^b	500	50	—	—
Case 4^b	700	50	—	—

^aConventional support. ^bJet grouting prereinforced support.