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为适应各种矿山地质条件准备巷道的需要,应采用这种型式的支护,它要在安全可靠的情况下保证:在爆破作业破坏危险最小的条件下支护可紧跟迎头,可采用机械化安装以提高支护工人的劳动生产率;在规定的服务年限内支护所消耗的材料和费用最少;有利于加强与其它掘进循环主要工序充分结合。为实现以上要求,要非常有效地利用混合式支护方法即锚杆和普通框架(金属拱形、钢筋混凝土或木质组合的框架)相结合的支护型式。混合式支护已成功地应用在卡
In order to meet the needs of various mining geological conditions for the preparation of roadway, this type of support should be used, it is to be safe and reliable to ensure that: in the blasting operation under the conditions of minimal danger to support follow the head can be mechanized Installation to improve the labor productivity of support workers; the minimum amount of materials and costs for support during the specified service life; and the full integration with the main processes of other driving cycles. In order to achieve the above requirements, the hybrid support method, that is, the combination of anchor rod and ordinary frame (metal arched, reinforced concrete or wood composite frame), should be utilized very effectively. Hybrid support has been successfully used in the card