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地表不允许塌陷时,急倾斜厚大矿体的开采是一个世界采矿技术难题。国内外对此类矿体采用高阶段空场嗣后充填法和高分段空场嗣后充填法。以李楼铁矿厚大矿体的开采为实例,从矿体赋存形态和矿岩稳固性对空场法、崩落法、充填法进行采矿方法的初选。对生产中应用的25 m高分段凿岩空场嗣后充填法和高阶段侧向崩矿嗣后充填法从采场生产能力、采场工程布置、采准工程量、工艺技术、采场充填周期进行技术分析比较,提出以高阶段侧向崩矿嗣后充填法为主,25 m高分段上向扇形孔空场采矿嗣后充填法和浅孔留矿法为辅的采矿方法,能实现安全、高效、大规模生产。随着凿岩设备、装药设备、爆破器材的发展,大孔穿爆,高分段或阶段凿岩在矿山中的应用越来越广泛,对类似开采条件的矿山具有一定的借鉴意义。
When the surface is not allowed to collapse, the mining of the steep-leaning thick ore body is a world mining technology problem. At home and abroad for such ore bodies using high-stage empty field after the filling method and high-end sub-field after filling method. Taking the exploitation of the thick ore body of Lilou iron mine as an example, the primary method of mining method is selected from the open-field method, caving method and filling method based on the ore-forming morphology and ore-rock solidity. In the production of 25 m high section of the rock drill after the filling method and subsequent high-stage lateral collapse after filling method from the stope production capacity, stope layout, quasi-engineering engineering, technology, stope filling cycle In the technical analysis and comparison, the mining method based on high-stage lateral collapse and post-filling method is proposed, and the mining method of secondary filling to the scalloped hole at 25 m high is supplemented by the shallow hole retention mining method, which can realize the safety, Efficient, mass production. With the development of rock drilling equipment, charging equipment and blasting equipment, it is more and more widely used in drilling for drilling with large holes, high-grade or stage rock-drilling, and has certain reference significance to similar mining conditions.