| 高瓦斯厚煤层覆岩裂隙瓦斯分布规律及抽放研究 |
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| 引用本文： | 王明中.高瓦斯厚煤层覆岩裂隙瓦斯分布规律及抽放研究[J].中州煤炭,2019,0(5):14-17. |
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| 作者姓名： | 王明中 |
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| 作者单位： | （河南理工大学 能源科学与工程学院，河南 焦作 454003） |
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| 摘 要： | 为了研究某煤矿厚煤层综放面开采覆岩裂隙演化和瓦斯运移规律，用理论分析和现场工程实践相结合的方法，在某矿进行了煤与瓦斯共采试验。研究得出，经过几次周期来压后，采空区的中部裂隙被压实，形成了通裂隙发育的“O”形圈；经过瓦斯抽采效果分析得出，在距离顶板大约40 m位置处、水平距回风巷33~43 m位置处，是布置抽采钻孔最合适的区域；采用顶板裂隙带钻孔+瓦斯尾巷抽采技术，可有效解决工作面回风巷上隅角瓦斯超限的问题。研究为实现煤与瓦斯共采提供了一定的技术支持。
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| 关 键 词： | 高瓦斯厚煤层 覆岩裂隙 瓦斯分布规律 “O”形圈 顶板裂隙带钻孔 瓦斯尾巷 |
Study on gas distribution and drainage of overlying rock fracture in high gassy thick coal seam |
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| Wang Mingzhong. Study on gas distribution and drainage of overlying rock fracture in high gassy thick coal seam[J].Zhongzhou Coal,2019,0(5):14-17. |
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| Authors: | Wang Mingzhong |
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| Affiliation: | （School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo 454003，China） |
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| Abstract: | In order to study the law of overburden fracture evolution and gas migration on fully-mechanized caving mining face of a coal seam，a combination of theoretical analysis and field engineering practice was carried out，and coal and gas co-production in a mine was tested.The study showed that after several cycles of periodic weighting，the central fissure of the goaf is compacted，forming a through-fracture that develops into an "O" ring；according to the analysis on effect of gas drainage，it was found that the most suitable area for the arrangement of boreholes where it is about 40 m away from the roof，and at the position of 33~43 m horizontally from the return airway.By the combined method of roof fracture zone boreholes+ gas extraction technology in tail gateway，it can effectively solve the gas over limit in upper corner of return airway on working face.The research has provided certain technical support for the realization of coal and gas co-production. |
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| Keywords: | ,high gassy thick coal seam, overburden fracture, gas distribution law, "O" ring, boreholes in roof fracture zone, gas tail gateway |
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