| 高应力和构造应力区联合增透抽采技术研究 |
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| 引用本文： | 潘雪松. 高应力和构造应力区联合增透抽采技术研究[J]. 中州煤炭, 2020, 0(7): 27-30，33. DOI: 10.19389/j.cnki.1003-0506.2020.07.006 |
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| 作者姓名： | 潘雪松 |
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| 作者单位： | （中煤科工集团 重庆研究院有限公司，重庆 400037） |
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| 摘 要： | 为了解决矿井高应力和构造应力影响作用下煤层透气性差、钻孔塑性变形垮孔严重的问题，以松藻煤电公司逢春煤矿M7、M8煤层为试验对象，采用水力压裂和水力割缝相结合的方式，对煤层进行增透，以提高瓦斯抽采效率。介绍了穿层钻孔区域防突措施设计方案，开展了水力压裂钻孔、瓦斯抽采钻孔设计以及注水压力、注水量和保压时间等水力压裂工艺参数试验。通过比较水力压裂、水力割缝增透措施结合硬套管封孔技术及普通钻孔瓦斯抽采情况，表明水力压裂和水力割缝后钻孔瓦斯抽采浓度分别提高16%~36%和4%~16%，瓦斯抽采量（纯量）分别提高了6倍和3倍，可为同类地质条件瓦斯抽采提供参考。现场试验结果表明，复杂地质低渗煤层水力压裂—割缝综合瓦斯增透技术在煤层强化抽采中有较好的实际应用价值。
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| 关 键 词： | 突出煤层 瓦斯抽采 水力压裂 水力割缝 联合增透 |
Study on combined enhanced permeability drainage technology in high stress and tectonic stress areas |
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| Pan Xuesong. Study on combined enhanced permeability drainage technology in high stress and tectonic stress areas[J]. Zhongzhou Coal, 2020, 0(7): 27-30，33. DOI: 10.19389/j.cnki.1003-0506.2020.07.006 |
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| Authors: | Pan Xuesong |
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| Affiliation: | （China Coal Technology and Engineering Group Chongqing Research Institute，Chongqing 400037，China） |
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| Abstract: | In order to solve the problems of poor coal permeability and severe plastic deformation and collapse of the borehole under the influence of high stress and structural stress in the mine，the M7 and M8 coal seams of the Fengchun Coal Mine of Songzao Coal and Electric Power Company were used as the test objects，and hydraulic fracturing and hydraulic slitting were adopted.In a combined manner，the coal seam was increased in permeability to improve the efficiency of gas extraction.The design plan of anti-outburst measures in the interpenetrating borehole area was introduced，and the design of hydraulic fracturing borehole，gas drainage borehole and hydraulic fracturing process parameter test such as water injection pressure，water injection volume and pressure holding time were carried out.Comparing hydraulic fracturing，hydraulic slotted penetration enhancement measures combined with hard casing sealing technology and ordinary borehole gas extraction，it showed that the gas extraction concentration of borehole after hydraulic fracturing and hydraulic slotting increased by 16%~36% and above 4%~16%，the gas drainage volume（pure volume）had been increased by 6 times and 3 times respectively，which could provide a reference for gas drainage under the same geological conditions.The field test results showed that the complex geological low permeability coal seam hydraulic fracturing-slit comprehensive gas permeability enhancement technology had better practical application value in coal seam enhanced drainage. |
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| Keywords: | outburst coal seam gas drainage hydraulic fracturing hydraulic slotting combined permeability enhancement |
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