Abstract
To study the correlation among advancing direction, strata behaviors, and rock burst induction, two physical models utilizing similar materials are established. Subsequently, the influence of advancing direction on the mining effect, caused by a fault, is studied. Moreover, the rock bursts affected by faults with different mining directions are compared and analyzed. The results show that the overlying structure varies notably, affected by fault cutting and fault dip, and the fault-affected zone and the cause of induced rock burst differ with different mining directions. However, regardless of mining directions, the overlying structure of the hanging wall is stable and fault activation is not obvious, while that of the footwall is relatively active and fault activation is violent; the risk of rock burst on the footwall is larger than that of mining on the hanging wall. Finally, an engineering case regarding two rock bursts in panel 6303 is used to verify some physical simulation results to a certain extent. Study results can serve as a reference for face layout and prevention of rock bursts under similar conditions.
Highlights
Because of the complicated geological conditions and stress environment of deep coal mines, the intensity and counts of rock bursts have increased notably
The influence of advancing directions on mining effect caused by a fault is studied, and the rock burst risks with different mining directions are compared and analyzed
The effect of fault activation is enhanced gradually, and the fault slipping is notable, which leads to the variation of fault plane stress and the rise of abutment stress of the footwall coal body; the footwall strata move fully, and the displacement is large
Summary
Because of the complicated geological conditions and stress environment of deep coal mines, the intensity and counts of rock bursts have increased notably. Wang et al [4], Jiang et al [11], and Jiang et al [12] studied the strata behaviors with conditions of thick hard strata and fault and revealed the rock burst-inducing mechanism. As to different faults and mining directions, the overlying strata present different failure-movement characteristics during the mining process, and fault activationinstability and its inducing way to rock burst are different, resulting in the degree of dynamic pressure, the delineation of dangerous areas, and their subsequent controls being different. It is necessary to carry out an in-depth study on mining effect in different mining directions under the influence of faults and to analyze and explain the relationship between mining effect, fault activation-instability, and rock burst induction. Study results can serve as a reference for face layout and prevention of rock bursts under similar conditions
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
