计算结果表明，底板岩体的应力呈非均匀分布。最大主应力与最小主应力差值、

The calculation results show that the stress of the floor rock mass is non-uniformly distributed. The difference between the maximum principal stress and the minimum principal stress and the maximum principal deflection stress are used to measure the imbalance of the stress field. The smaller the imbalance of the stress field, the easier it is for the roadway to maintain stability.

The results show that the stress of the substrate rock body is unevenly distributed. The difference between the maximum main stress and the minimum main stress, and the maximum main stress are used to measure the degree of imbalance of the stress field, the smaller the degree of imbalance of the stress field, the easier it is to maintain stability in the laneway.

The results show that the stress distribution of floor rock mass is non-uniform. The difference between the maximum principal stress and the minimum principal stress, and the maximum principal deviator stress are used to measure the imbalance degree of the stress field. The smaller the imbalance degree of the stress field is, the easier the roadway is to maintain stability.<br>