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陕北黄土高原煤矿区覆盖着厚黄土层且水资源短缺,为了指导其安全生产和水资源保护,以黄陵二号矿为例,应用多种方法研究冒裂带发育高度,以期得出较优的预测方法,并得出黄陵矿区适合的裂采比.研究主要利用有限差分软件(FLAC3D)进行数值模拟,由于厚黄土自重影响基岩开采沉陷,计算中使用了厚黄土有效载荷对应的等效开采宽度.研究还应用了经验公式计算法和实际钻探测量法,对比实际钻探测量数据,数值模拟结果与其较为一致,而经验公式计算结果则小得多.因此在黄陵厚黄土层煤矿区,经验公式并不适用,而数值模拟则较为准确.通过综合分析计算结果,得出黄陵二号矿适合的裂采比为28,并应用裂采比对黄陵二号矿首采区顶板突水危险性进行了分区预测,为其水害的预防和控制提供了参考.
In order to guide its safe production and water resources protection, the loess plateau in northern Shaanxi is covered with thick loess layer. Taking Huangling No.2 Mine as an example, a number of methods are used to study the developmental height of the fissured zone so as to obtain a comparatively better water- And the suitable ratio of fracturing and mining in Huangling mining area is obtained.The numerical simulation is carried out by means of finite difference software (FLAC3D). Because the weight of thick loess affects the subsidence of bedrock mining, the effective load of thick loess is used in the calculation The equivalent mining width.The empirical formula calculation method and the actual drilling measurement method are also used to compare the actual drilling measurement data with the numerical simulation results more consistent with the empirical formula calculation results are much smaller.Therefore, Area and empirical formula are not applicable, and the numerical simulation is more accurate.According to the comprehensive analysis and calculation results, it is concluded that the suitable fracturing-mining ratio of Huangling No.2 Mine is 28 and the ratio of fracturing to mining is the best for the first mining area of Huangling No.2 Mine The risk of roof water inrush was predicted by zoning, which provided a reference for the prevention and control of water damage.