最大水平主应力方向以近东西向为主，水力压裂裂缝的延伸方向也以近东西向为主；
The conclusion is that the size of terrestrial stress mainly is vertical principal stress maximum and the fracture of hydraulic fracturing is vertical.
洞室地应力以构造应力为主，其最大主应力方向与厂房轴线方向近垂直。
The cave's initial principal stress is tectonic stress, and the Max main stress's direction is perpendicular to the power house's stalk line.
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