Small coal pillar in high stress area has pre-developed splits and large horizontal displacement, and its stress concentration degree is lower.
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。
The reasonable mining design should avoid and relieve the stress as far as possible the high degree of concentration.
合理的开采设计应尽量避免和解除应力的高度集中和发生因应力升高而引起的危险。
The reasonable mining design should avoid and relieve the stress as far as possible the high degree of concentration and has because the stress to elevate the danger which causes.
合理的开采设计应尽量避免和解除应力的高度集中和发生因应力升高而引起的危险。
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