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无底柱分段崩落法中切割槽一直是该方法的重要组成部分。一般而言,为了确保切割槽形成的质量,都是在切割横巷内施工切割天井,再以切割天井为自由面,通过中深孔爆破形成切割槽。而黄山铜镍矿矿体非常破碎,在切割横巷内施工切割天井安全隐患大,作业人员安全无法保障,安全管理难度大。采用机械设备形成切割天井又不具备现场条件。在这种情况下,在保证安全的前提下,又要确保形成切割槽,必须采取更为有效的方法来形成。通过现场试验,中深孔楔形拉槽技术是一种简单、使用、可靠的拉槽方法。
Slot cutting in non-pillar caving has been an important part of this method. In general, in order to ensure the quality of the formation of cutting grooves, cutting slabs are constructed in the cutting laneways, and then the cutting patio is a free surface. The cutting grooves are formed by medium-deep borehole blasting. The Huangshan copper and nickel ore ore body is very fragmented, cut the construction of cut-off lane in the alley security hidden danger, the safety of workers can not be protected, safety management difficult. The use of mechanical equipment to form a cutting patio do not have the site conditions. Under such circumstances, to ensure the safety of the premise, but also to ensure the formation of cutting groove, we must take a more effective way to form. Through the field test, the deep-hole wedge slot technology is a simple, reliable and reliable slotting method.