| 煤矿巷道底板冲击矿压发生的原因及控制研究 |
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| 引用本文： | 徐学锋,窦林名,刘军,崔晓晖,张银亮,姚喜渊.煤矿巷道底板冲击矿压发生的原因及控制研究[J].岩土力学,2010,31(6):1977-1982. |
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| 作者姓名： | 徐学锋 窦林名 刘军 崔晓晖 张银亮 姚喜渊 |
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| 作者单位： | 1. 中国矿业大学 煤炭资源与安全开采国家重点实验室，江苏 徐州221008；2. 中国矿业大学 矿业工程学院，江苏 徐州 221008； 3. 河南理工大学 能源科学与工程学院，河南 焦作 454000；4. 义马煤业集团 跃进煤矿，河南 义马 472300 |
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| 基金项目： | 国家重点基础研究(973)专项项目，中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金，河南省教育厅自然科学研究计划项目 |
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| 摘 要： | 巷道底板水平应力是导致底板冲击矿压发生的主要因素，根据巷道底板冲击矿压的特点，建立了底板冲击矿压发生条件与影响因素的力学模型，初步确定了底板冲击矿压危险性系数的表达式。当底板岩层泊松比一定时，底板冲击矿压危险性系数与巷道埋深、巷道宽度的平方、水平构造应力、巨厚坚硬老顶影响系数成正比，与弹性模量、巷道底板软弱层厚度的平方成反比。通过数值模拟，发现巷道开挖后底板煤层的水平应力升高和垂直应力降低的规律，底板应力极易达到煤层破坏极限，在支护不当和外界扰动下容易发生底板冲击矿压。最后确定了底板强度弱化减冲原理，在跃进煤矿25110工作面下巷采取底板爆破卸压措施后取得了良好效果。研究成果为解决类似条件底板冲击矿压防治问题提供了理论依据和借鉴。
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| 关 键 词： | 底板冲击矿压 水平应力 底板冲击矿压危险性系数 数值模拟 底板爆破卸压 |
| 收稿时间： | 2009-10-23 |
Research of reasons and controlling for floor burst in coal mine roadway |
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| XU Xue-feng,DOU Lin-ming,LIU Jun,CUI Xiao-hui,ZHANG Yin-liang,YAO Xi-yuan.Research of reasons and controlling for floor burst in coal mine roadway[J].Rock and Soil Mechanics,2010,31(6):1977-1982. |
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| Authors: | XU Xue-feng DOU Lin-ming LIU Jun CUI Xiao-hui ZHANG Yin-liang YAO Xi-yuan |
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| Institution: | 1. State Key Laboratory of Coal Resources and Mine Safety, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China; 2. School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China; 3. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 4. Yuejin Coal Mine of Yima Coal Mining Group, Yima, Henan 472300, China |
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| Abstract: | The horizontal stress in the floor of roadway plays an important role in floor burst. According to the theory and characteristics of floor burst, a mechanical model is set up; and the dangerous coefficient of floor burst is also initially given. The research results show that the dangerous coefficient of floor burst is directly proportional to the depth, the horizontal tectonic stress , the square of width of roadway and the coefficient of hard roof abutment pressure, and inversely proportional to the elastic modulus of rock and the square of the thickness of soft rock of floor when the Poisson’s ratio is invariable. Through numerical simulation, the distribution laws of horizontal stress rising and vertical stress reducing in the floor are found out. When the stress is more than the breaking point of the floor coal seam, floor burst will happen with the influence of blast firing or roof breaking quickly. According to the research, the intensity weakening theory for floor burst is established. The measure of blasting for stress-relief in the floor is applied to the haulage gateway of 25110 coal face in Yuejin Coal Mine, and has gained good effect. The study conclusions provide theoretical foundation and ways for floor burst prevention in similar conditions. |
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| Keywords: | floor burst horizontal stress dangerous coefficient of floor burst numerical simulation blasting for stress-relief in floor |
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