深部保护层开采煤岩体动力学演化的参数计算分析 |
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引用本文: | 惠功领,宋锦虎. 深部保护层开采煤岩体动力学演化的参数计算分析[J]. 煤矿安全, 2013, 44(6): 168-171 |
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作者姓名: | 惠功领 宋锦虎 |
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作者单位: | 1. 河南理工大学安全科学与工程学院,河南焦作,454000 2. 河南城建学院土木与材料工程系,河南平顶山,467044 |
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基金项目: | 国家重点基础研究发展计划资助项目(2011CB201205)国家自然科学基金资助项目 |
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摘 要: | 通过将平煤股份十二矿的己14-31010保护层开采工作面作为试验原型进行了数值模拟试验,分析了开采高度、层间距、层间岩性对下伏煤岩体卸压的影响。通过对比保护层采高分别为0.65、1.3、2.6 m的计算结果,得知采高越大,对被保护层的卸压保护效果越好;通过层间距为9.1 m和29.1 m的对比计算,得知随着层间距的增加,保护层的卸压效果越来越差;通过不同层间岩性的对比计算,得知层间坚硬岩层的存在,将影响对下被保护层的卸压保护作用。
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关 键 词: | 深部开采 近距离 保护层开采 采动压力 数值模拟 |
Parameter Calculation Analysis of the Coal Rock Dynamical Evolution of the Deep Protective Seam Mining |
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Abstract: | Through taking the mining face of Ji14-31010 protective seam in the Twelve Coal Mine of Pingdingshan Tian'an Coal Industry Co.,Ltd as a test prototype,it made numerical simulation experiments,and analyzed the effects of mining height,seam spacing,interlaminar lithology on underlying coal-rock relief.By comparing the calculation results of protective seam mining heights which included 0.65 m,1.3 m and 2.6 m,it obtained that the bigger the mining height was,the better the pressure relief effect for the protected seam was.By comparative calculation for seam spacing of 9.1 m and 29.1 m,it attained that the relief effect of protective seam became worse and worse with the increase of the seam spacing.By comparative calculation for different interlaminar lithology,it obtained that pressure relief protective effect for the protected seam below would be affected by the presence of interlaminar hard rock. |
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Keywords: | deep mining close range protective seam mining mining pressure numerical simulation |
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