- 更多网络例句与未可厚非相关的网络例句 [注:此内容来源于网络,仅供参考]
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Because the direct roof of the No.92 ore-body is the backfilling of the No.91orebody which is the cementing materials or non-cementing materials, and there are no-filled mined-areas in someplace. So there are large-scale hidden troubles on the top of the No.92 slowly inclined large and thick ore-body, then we must find a new mining technology which aims at the complex mining condition of the No.92 ore-body. The cutting nature of the No.92 ore-body is very poor, so choosing the rational drilling and blasting parameters and enhancing the overall technological economic benefits are also the urgent problems waiting to be solved in the exploitation of the No.92 ore-body. The No.92 ore-body, thin lodes and the exploitation process of the No.91orebody influence each other, the geo-pressure phenomena aggravates obviously in case of the mined-areas increase constantly, and the geo-pressure problem will be more and more serious when the No.92 ore-body be exploited on a large scale in the next step.
由于它的直接顶板就是开采91号矿体时的胶结或者非胶结的空区充填体,部分地段甚至是未充填的采空区,使92号缓倾斜厚大矿体的上部形成大范围的隐患区,因此,必须针对92号矿体复杂的开采技术条件,寻找新的采矿技术与工艺。92号矿体的可凿性极差,选择合理的凿岩爆破参数,提高凿岩爆破工作的总体技术经济效益,也是92号矿体开采急待解决的问题。92号矿体与细脉带、91号矿体开采相互影响,目前在采空区不断增大的情况下地压显现有明显加剧的趋势,在下一步92号矿体大规模开采时,地压问题将越来越严重。