Shock and Vibration

Research Article

Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology

Table 6

Relationship between load and strain rate.
Strain rate (s−1)Change rate of load (MPajingtai)Type
<10−5<0.1Static load
10−5∼10−30.1–10Stress disturbance
>10−3>10Dynamic load