以往开切眼的支护一般为木棚，使开切眼的空间狭小，对于安装设备的效率和安全有很大影响。
In the past, the supporting of open-off cut used to be log shed. Since the space is limited, the facilities fixing efficiency and safety are influenced greatly.
工业试验表明：开切眼巷道使用改进后的锚杆支护，有利于工作面安全生产，且能降低支护成本。
Commercial tests indicate that adopting the improved bolts are good for safety in production and can reduce support cost.
工业试验表明：开切眼巷道使用改进后的锚杆支护，有利于工作面安全生产，且能降低支护成本。
Commercial tests indicate that adopting the improved bolts are good for safety in production and can reduce support cost.
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