大采高工作面超前支承压力区深孔注浆防片帮技术
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摘要
为有效地解决大采高综采工作面片帮问题,通过数值模拟分析了1307工作面超前支承压力分布规律;制定了单轴和三轴卸压实验方案,研究了煤体裂隙开始增生规律,确定了注浆时机。最后,在赵庄矿1307工作面进行应用,并且通过钻孔窥视分析注浆效果,结果表明,注浆效果显著,具有良好的经济和安全效益。
In order to effectively solve the rib spalling of high cutting fully mechanized mining face,numerical simulation was carried out to analyze the distribution law of advance abutment pressure,uniaxial and triaxial compression experimental scheme is formulated,and the law of coal body crack initiation proliferation is explored to determine the time of grouting. The research results were applied in Zhaogezhuang Coal Mine with the grouting effect monitored by borehole peeping. The results showed that,the grouting effect was remarkable offering favorable economic and safety benefits.
In order to effectively solve the rib spalling of high cutting fully mechanized mining face,numerical simulation was carried out to analyze the distribution law of advance abutment pressure,uniaxial and triaxial compression experimental scheme is formulated,and the law of coal body crack initiation proliferation is explored to determine the time of grouting. The research results were applied in Zhaogezhuang Coal Mine with the grouting effect monitored by borehole peeping. The results showed that,the grouting effect was remarkable offering favorable economic and safety benefits.
引文
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[2]赵景礼.厚煤层全高开采新论[M].北京:煤炭工业出版社,2004.
[3]中华人民共和国煤炭工业部.煤与岩石物理力学性质测定方法[M].北京:中国标准出版社,1988.
[4]翟小洁.岩石在单轴受荷条件下的超声波特性研究[D].成都:成都理工大学,2008.
[5] ALKAN H,CINAR Y,PUSCH G. Rock salt dilatancy boundary from combined acoustic emission and triaxial compression tests[J]. International Journal of Rock Mechanics&Mining Sciences,2007,44:108-119.
[6] MARTIN C D,READ R S. Strength of massive granite around underground excavations[C]. Proceedings of the 16th Canadian Rock Mechanics Symposium. Sudbury,1992:1-11.
[7] MAHMUTOGLU Y,VARDAR M. Effects of inelastic volume increase on fractured rock behaviour[J]. Bull Eng Geol Env,2003,62:117-121.
[8]谢和平.不同开采条件下采动力学行为研究[J].煤炭学报,2011,36(7):1067-1074.
[9]谢和平,张泽天,高峰,等.不同开采方式下煤岩应力场-裂隙场-渗流场行为研究[J].煤炭学报,2016,41(10):2405-2417.
[10]苏承东,高保彬,南华,等.不同应力路径下煤样变形破坏过程声发射特征的试验研究[J].岩石力学与工程学报,2009,28(4):757-766.