Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Table 3

Sensor sequencing results in different periods.

Date	Sensor sequencing (from heading face to back)	Shifting sensor
June 1–June 12	1432	—
June 13–June 23	2143	#2
June 23–June 30	3214	#3
July 1–July 9	4321	#4