| 水力致裂弱化坚硬顶板现场试验研究 |
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| 引用本文： | 孙兴林,窦林名,张士斌,贺虎,高京龙.水力致裂弱化坚硬顶板现场试验研究[J].煤矿安全,2011,42(5):16-19. |
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| 作者姓名： | 孙兴林 窦林名 张士斌 贺虎 高京龙 |
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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. 兖州煤业股份有限公司,济三煤矿,山东,济宁,272000 |
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| 摘 要： | 针对济三煤矿6305工作面坚硬厚层砂岩顶板难以断裂跨落,采用波兰水力致裂技术进行顶板的致裂。通过对不同孔深的致裂钻孔进行注水致裂,然后观测布置在周围的观测钻孔是否有水流出,以确定最大的致裂半径,根据现场试验验证,最大致裂半径可达6～10 m。同时对比致裂过程前后钻孔的煤粉量,验证了致裂后煤岩体的应力明显降低,从而能有效防止冲击矿压的发生。最后分析微震监测系统SOS接收到的致裂过程矿震波形特点与频谱分布图,得出在致裂过程中会诱发小矿震,震动频率相对较大,能量主要集中在高频部分。
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| 关 键 词： | 水力致裂 坚硬顶板 微震监测 波形分析 |
Field Testing and Study on Hydraulic Fracturing to Weaken Hard Roof |
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| SUN Xing-lin,DOU Lin-ming,ZHANG Shi-bin,HE Hu,GAO Jing-long.Field Testing and Study on Hydraulic Fracturing to Weaken Hard Roof[J].Safety in Coal Mines,2011,42(5):16-19. |
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| Authors: | SUN Xing-lin DOU Lin-ming ZHANG Shi-bin HE Hu GAO Jing-long |
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| Affiliation: | SUN Xing-lin1,DOU Lin-ming1,ZHANG Shi-bin2,HE Hu1,GAO Jing-long1(1.State Key Lab of Coal Resources and Safety Mining,China University of Mining and Technology,Xuzhou 221008,China,2.Jisan Coal Mine,Yanzhou Coal Group Co.Ltd,Jining 272000,China) |
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| Abstract: | In order to address the problem that the hard thick sandstone roof of 6305 working face in Jisan Coal Mine is difficult to fracture,hydraulic fracturing technique introduced from Poland was adopted to cut off the roof.First pressure water was injected to test holes with different drill hole depth and the maximum crack radius was determined through investigating whether there was water flowing from the observation holes arranged around test holes.Field test verification reveals that the maximum crack radius ... |
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| Keywords: | hydraulic fracturing hard roof microseismic observation waveform analysis |
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