Original bolt-supporting technology of rail roadway 4302 played little role in supporting, so it led to severe deformation, bad maintaining conditions and high maintaining cost of roadway.
某矿4302轨道平巷原有的锚杆支护技术不能有效的发挥作用，导致部分巷道变形严重，维护条件差，维护费用高。
Original bolt-supporting technology of rail roadway 4302 played little role in supporting, so it led to severe deformation, bad maintaining conditions and high maintaining cost of roadway.
某矿4302轨道平巷原有的锚杆支护技术不能有效的发挥作用，导致部分巷道变形严重，维护条件差，维护费用高。
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