2024 03 v.6;No.24 34-46
厚硬岩层结构调控低损开采方法及机理研究
基金项目(Foundation):
国家自然科学基金面上基金资助项目(52174079)
邮箱(Email):
1849633238@qq.com;
DOI:
10.13532/j.jmsce.cn10-1638/td.20240515.001
中文作者单位:
煤炭科学研究总院开采研究分院;中煤科工开采研究院有限公司;天地科技股份有限公司开采设计事业部;煤炭智能开采与岩层控制全国重点实验室;
摘要(Abstract):
为探究厚硬岩层采动结构对上覆岩层下沉破坏影响及新的低损开采方法,采用相似模拟、离散元数值模拟方法分析了厚硬基本顶采动破坏结构演化和堆积特征对覆岩下沉破坏的影响。相似模拟及数值模拟结果均表明,随采随垮的直接顶岩层和周期性破断的厚硬基本顶分别呈现小块度破坏杂乱堆积和大块度破断整齐堆积;受采动结构特征影响,直接顶岩层采动破坏产生的体积膨胀显著大于厚硬基本顶。根据模拟得到的采动岩层破坏堆积特征构建了厚硬基本顶条件下采动覆岩下沉计算模型。根据采动作用下随采随垮直接顶岩层采动破坏膨胀量显著大于周期性破断厚硬基本顶的规律,提出对厚硬基本顶进行采前大规模水力压裂并借助采动超前支承压力进一步破坏厚硬基本顶,降低厚硬基本顶采动破坏块度,使其随采随垮、杂乱堆积并充分充填采空区以控制上覆岩层下沉破坏,实现低损开采。采用数值模拟验证了压裂弱化厚硬岩层调控其采动结构,增大采动破坏岩层体积膨胀量,降低上覆岩层下沉的有效性。提出的厚硬岩层结构调控低损开采方法可为煤矿绿色高效开采提供一定的参考。
关键词(KeyWords):
低损开采;;岩层控制;;水力压裂;;覆岩结构调控;;采动岩层膨胀
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参考文献
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[15]郑凯歌,杨俊哲,李彬刚,等.基于垮落充填的坚硬顶板分段压裂弱化解危技术[J].煤田地质与勘探, 2021,49(5):77–87.ZHENG Kaige, YANG Junzhe, LI Bingang, et al. Collapse filling-based technology of weakening and dangersolving by staged fracturing in hard roof[J]. Coal Geology&Exploration, 2021, 49(5):77–87.
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[21]许家林,鞠金峰.特大采高综采面关键层结构形态及其对矿压显现的影响[J].岩石力学与工程学报, 2011,30(8):1547–1556.XU Jialin, JU Jinfeng. Structural morphology of key stratum and its influence on strata behaviors in fullymechanized face with super-large mining height[J]. Chinese Journal of Rock Mechanics and Engineering, 2011,30(8):1547–1556.
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[2]张吉雄,鞠杨,张强,等.矿山生态环境低损害开采体系与方法[J].采矿与岩层控制工程学报, 2019, 1(1):013515.ZHANG Jixiong, JU Yang, ZHANG Qiang, et al. Low ecological environment damage technology and method in coal mines[J]. Journal of Mining and Strata Control Engineering, 2019, 1(1):013515.
[3]李晓斌,李全生,韩鹏华,等.高强度开采地表损伤程度分类判别与控制研究[J].采矿与岩层控制工程学报,2022, 4(3):033014.LI Xiaobin, LI Quansheng, HAN Penghua, et al. Identification of surface damage degree in high-intensity mining and control technologies[J]. Journal of Mining and Strata Control Engineering, 2022, 4(3):033014.
[4]李凤明,丁鑫品,孙家恺.我国采煤沉陷区生态环境现状与治理技术发展趋势[J].煤矿安全, 2021, 52(11):232–239.LI Fengming, DING Xinpin, SUN Jiakai. Ecological environment status and development trend of governance technology of coal mining subsidence area in China[J].Safety in Coal Mines, 2021, 52(11):232–239.
[5]黄宝柱,阎跃观,马国平,等.唐山矿“充–留”协调开采覆岩及煤柱变形规律研究[J].煤炭工程, 2021,53(8):115–120.HUANG Baozhu, YAN Yueguan, MA Guoping, et al.Deformation law of overlying strata and coal pillar in coordinated backfilling-retaining mining in Tangshan Mine[J]. Coal Engineering, 2021, 53(8):115–120.
[6]许家林,轩大洋,朱卫兵,等.基于关键层控制的部分充填采煤技术[J].采矿与岩层控制工程学报, 2019,1(1):013504.XU Jialin, XUAN Dayang, ZHU Weibing, et al. Partial backfilling coal mining technology based on key strata control[J]. Journal of Mining and Strata Control Engineering, 2019, 1(1):013504.
[7]张吉雄,屠世浩,曹亦俊,等.深部煤矿井下智能化分选及就地充填技术研究进展[J].采矿与安全工程学报,2020, 37(1):1–10, 22.ZHANG Jixiong, TU Shihao, CAO Yijun, et al. Research progress of technologies for intelligent separation and insitu backfill in deep coal mines in China[J]. Journal of Mining&Safety Engineering, 2020, 37(1):1–10, 22.
[8]赵春虎,王皓,靳德武.煤层开采覆岩预裂–注浆改性失水控制方法探讨[J].煤田地质与勘探, 2021, 49(2):159–167.ZHAO Chunhu, WANG Hao, JIN Dewu. Discussion on roof water loss control method of coal seam based on presplitting grouting reformation(P-G)[J]. Coal Geology&Exploration, 2021, 49(2):159–167.
[9]黄炳香,赵兴龙,陈树亮,等.坚硬顶板水压致裂控制理论与成套技术[J].岩石力学与工程学报, 2017,36(12):2954–2970.HUANG Bingxiang, ZHAO Xinglong, CHEN Shuliang,et al. Theory and technology of controlling hard roof with hydraulic fracturing in underground mining[J]. Chinese Journal of Rock Mechanics and Engineering, 2017,36(12):2954–2970.
[10]马彦阳,吴教锟,冯仁俊,等.坚硬顶板定向长钻孔水力压裂卸压瓦斯抽采研究[J].矿业安全与环保, 2022,49(6):52–56.MA Yanyang, WU Jiaokun, FENG Renjun, et al. Pressure relief gas drainage by directional drilling hydraulic fracturing in hard roof[J]. Mining Safety&Environmental Protection, 2022, 49(6):52–56.
[11]乔伟.顺层长钻孔中压水力割缝增透技术及应用[J].矿业安全与环保, 2022, 49(2):122–126.QIAO Wei.Application on anti-reflection technology of long borehole along coal seam with medium pressure hydraulics lotting[J]. Mining Safety&Environmental Protection, 2022, 49(2):122–126.
[12]冯彦军,康红普.定向水力压裂控制煤矿坚硬难垮顶板试验[J].岩石力学与工程学报, 2012, 31(6):1148–1155.FENG Yanjun, KANG Hongpu. Test on hard and stable roof control by means of directional hydraulic fracturing in coal mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(6):1148–1155.
[13]于斌,高瑞,孟祥斌,等.大空间远近场结构失稳矿压作用与控制技术[J].岩石力学与工程学报, 2018, 37(5):1134–1145.YU Bin, GAO Rui, MENG Xiangbin, et al. Near-far strata structure instability and associate strata behaviors in large space and corresponding control technology[J].Chinese Journal of Rock Mechanics and Engineering,2018, 37(5):1134–1145.
[14]杨俊哲,郑凯歌.厚煤层综放开采覆岩动力灾害原理及防治技术[J].采矿与安全工程学报, 2020, 37(4):750–758.YANG Junzhe, ZHENG Kaige. Principle and prevention technology of overburden dynamic disaster in fully mechanized mining of thick coal seams[J]. Journal of Mining and Safety Engineering, 2020, 37(4):750–758.
[15]郑凯歌,杨俊哲,李彬刚,等.基于垮落充填的坚硬顶板分段压裂弱化解危技术[J].煤田地质与勘探, 2021,49(5):77–87.ZHENG Kaige, YANG Junzhe, LI Bingang, et al. Collapse filling-based technology of weakening and dangersolving by staged fracturing in hard roof[J]. Coal Geology&Exploration, 2021, 49(5):77–87.
[16]高富强.工作面坚硬顶板水力压裂对采动应力影响的数值模拟研究[J].采矿与岩层控制工程学报, 2021,3(2):023032.GAO Fuqiang. Influence of hydraulic fracturing of strong roof on mining-induced stress-insight from numerical simulation[J]. Journal of Mining and Strata Control Engineering, 2021, 3(2):023032.
[17]张玉军,张志巍.煤层采动覆岩破坏规律与控制技术研究进展[J].煤炭科学技术, 2020, 48(11):85–97.ZHANG Yujun, ZHANG Zhiwei. Research progress of mining overlying stratas failure law and control technology[J]. Coal Science and Technology, 2020, 48(11):85–97.
[18]王婉洁,高富强.工作面覆岩采动裂隙演化规律物理及数值模拟研究[J].采矿与岩层控制工程学报, 2023,5(2):023033.WANG Wanjie, GAO Fuqiang. Study of the evolution of mining-induced fractures with longwall face proceedsinsight from physical and numerical modeling[J]. Journal of Mining and Strata Control Engineering, 2022, 5(2):023033.
[19]许家林,秦伟,轩大洋,等.采动覆岩卸荷膨胀累积效应[J].煤炭学报, 2020, 45(1):35–43.XU Jialin, QIN Wei, XUAN Dayang, et al. Accumulative effect of overburden strata expansion induced by stress relief[J]. Journal of China Coal Society, 2020, 45(1):35–43.
[20]郭广礼,缪协兴,张振南.老采空区破裂岩体变形性质研究[J].科学技术与工程, 2002, 2(5):44–47.GUO Guangli, MIAO Xiexing, ZHANG Zhennan. Research on ruptured rock mass deformation characteristics of longwall goafs[J]. Science Technology and Engineering, 2002, 2(5):44–47.
[21]许家林,鞠金峰.特大采高综采面关键层结构形态及其对矿压显现的影响[J].岩石力学与工程学报, 2011,30(8):1547–1556.XU Jialin, JU Jinfeng. Structural morphology of key stratum and its influence on strata behaviors in fullymechanized face with super-large mining height[J]. Chinese Journal of Rock Mechanics and Engineering, 2011,30(8):1547–1556.
[22]任岚,林然,赵金洲,等.页岩气水平井增产改造体积评价模型及其应用[J].天然气工业, 2018, 38(8):47–56.REN Lan, LIN Ran, ZHAO Jinzhou, et al. A stimulated reservoir volume(SRV)evaluation model and its application to shale gas well productivity enhancement[J]. Natural Gas Industry, 2018, 38(8):47–56.
基本信息:
DOI：10.13532/j.jmsce.cn10-1638/td.20240515.001
中图分类号:TD823
引用信息:
[1]张玉军,肖杰,李嘉伟等.厚硬岩层结构调控低损开采方法及机理研究[J].采矿与岩层控制工程学报,2024,6(03):34-46.DOI:10.13532/j.jmsce.cn10-1638/td.20240515.001.
基金信息:
国家自然科学基金面上基金资助项目(52174079)
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