高应力区的小煤柱已充分预发育裂隙，且水平位移大，应力水平降低。
Small coal pillar in high stress area has pre-developed splits and large horizontal displacement, and its stress concentration degree is lower.
岩爆的预防和控制对深部高应力区矿床的安全开采具有十分重要的意义。
The prevention and control of rock burst are of great significance for safely exploiting deep deposit in high-stress area.
这样我们能够直接观察高应力区的三维图象，即高应力区的表面形状及其深度。
In this way, the 3d image of high stress zone, both the shape on surface and the depth of the zone, can be observed directly.
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