Stability of Close Chambers Surrounding Rock in Deep and Comprehensive Control Technology

Table 3

Deformation of the chamber under different excavation modes (unit: mm).

Excavation mode	Chamber	Floor heave volume	Roof subsidence volume	Left side horizontal displacement	Right side horizontal displacement
Excavation of the water pump house	Water pump house	389	437	549	579
Excavation of the water pump house and transport roadway		524	645	832	719
Excavation of the waiting room, −850 m main haulageway, and water pump house		614	726	959	750
	−850 m main haulageway	662	743	774	789
	Waiting room	509	504	560	662