Experimental Study on Mechanical Properties and Energy Dissipation of Gas Coal under Dynamic and Static Loads

Table 1

Basic parameters of the strain gauge.

Resistance strain gauge	Model	Resistance (Ω)	Sensitivity coefficient	Grid length × grid width (mm)	Base size (length × width) (mm)
	BX120-2AA	119.8 ± 0.1	2.08 ± 1%	2×1	6 × 3
Semiconductor strain gauge	Model	Resistance (Ω)	Sensitivity coefficient	Silicon bar size (mm)	Base size (length × width) (mm)
	TP-5-120	120	110 ± 5%	5 × 0.30 × 0.05	6 × 4