| 煤储层造缝及卸压增透实验研究 |
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| 引用本文： | 蔺海晓,苏现波,刘晓,郭红玉.煤储层造缝及卸压增透实验研究[J].煤炭学报,2014,39(Z2):432-435. |
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| 作者姓名： | 蔺海晓 苏现波 刘晓 郭红玉 |
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| 作者单位： | 1.河南理工大学 深部矿井建设开放实验室，河南 焦作 454000；;
2.中国矿业大学 煤层气资源与成藏过程教育部重点实验室，江苏 徐州 221116；;
3.河南理工大学 能源科学与技术学院，河南 焦作 454000；;
4.河南理工大学 土木工程学院，河南 焦作 454000 |
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| 基金项目： | 国家自然科学基金资助项目（41472129）；山西省煤层气联合研究基金资助项目(2013012004)；煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金资助项目(2013-003) |
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| 摘 要： | 煤矿井下瓦斯抽采难易程度取决于煤体渗透性,煤体增透是瓦斯抽采研究的关键之一。以煤岩体加载作用下的渗透率测试实验为前提,揭示了不同结构煤体水力强化的造缝和卸压两种增透机理;提出了硬煤(原生结构煤和碎裂煤)可通过水力压裂造缝提升渗透率,软煤(碎粒煤和糜棱煤)可通过冲孔出煤卸压增透或顶底板围岩水力压裂抽采的两种工艺,从而形成了基于煤体结构的水力强化增透瓦斯抽采技术。现场应用结果充分说明了实验室研究结论的正确性。
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| 关 键 词： | 水力强化 压裂增透 卸压增透 渗透率 瓦斯抽采 煤体结构 |
| 收稿时间： | 2013-08-13 |
Experimental study of permeability enhancement in coal layers by fracture making or unloading |
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| Abstract: | The difficulty of gas extraction in underground coal layers depends on the coal permeability，coal permeability enhancement is a key for gas extraction.In this paper，based on the measurements of penetration rates in coal-rocks with loading，two different mechanisms were proposed for the hydraulic-induced permeability enhancements in different coal structures.Consequently，the experimental results show that the permeability of hard coal (original structural and cracked coal) can be improved by hydraulic fracturing，and that of soft coal (crashed and mylonitic coal) may be enhanced by unloading through taking coal out with hole-drilling or by mining with hydraulic fracturing of roof，floor and surrounding rock.Thus，a gas mining technique has been developed，which is suitable for different coal structures based on hydraulic strength.The experimental results were also verified by the site applications. |
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| Keywords: | hydraulic reinforcement fracturing permeability improvement unloading permeability improvement permeability rate gas extraction coal structure |
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