Research on Optimization of Mining Substitution in Wangzhuang Mine Based on System Dynamics

Table 1

Key influencing factors of mining system.

The key factors	Detailed index	Driving system	Coal mining system
Geological structure level	Distance of geological structural zone (m)	√	√
Mine pressure level of underground roadway	Advance support distance of roadway (m)	×	√
	Two-sided displacement (mm)	×	√
Working environment level	Water inflow per unit time at mining face (m^3/h)	√	√
	Roof crushing degree	√	√
	Roof falling capacity (mm)	√	√
	Roof subsidence rate (mm/min)	√	√
	Return air flow gas concentration at the mining face (%)	√	√
Regular circulation level	Normal circulation rate (%)	√	√
Mechanical and electrical equipment failure level	Electromechanical equipment accident rate (%)	√	√
Power on level	Operating rate (%)	√	√