According to the mechanics analysis method of BHA and the real work state of drill string in inclined straight well, a mechanical model of BHA is presented.
根据现有钻具力学分析方法和斜直井钻具的实际工作状态，建立了斜直井下部钻具力学分析模型。
The settlement calculation of artificial roof was done with structural mechanics analysis method, and the scale of thickness which can maintain the artificial roof stably was obtained.
首先通过结构力学解析法对顶板沉降量的计算，估算出能维持顶板稳定的厚度取值范围；
The new back analysis method of physics and mechanics parameters of surrounding rock was established by uniform design, calculus of differences and fuzzy artificial neural networks in this paper.
基于均匀设计、差分法和模糊人工神经网络建立了新的隧道围岩物理力学参数反分析方法。
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