巷道过断层技术研究与应用
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摘要
为了确保龙王沟煤矿回风大巷安全通过导通承压水的断层,阻隔底板奥灰水与巷道间的导水通道,有效提高断层破碎带的岩石强度,避免断层滞后突水和发生冒顶事故,采用对奥灰纪灰岩顶界面以下10～30 m范围内的岩层注浆和对断层破碎带巷道围岩帷幕注浆的方法,对巷道过断层治理技术进行了研究。回风大巷通过该断层后,该段巷道顶板只有少量淋水,总淋水量仅为0.5 m3/h。结果表明:通过对该断层的注浆治理,有效地封堵了奥灰水的导水通道,提高了巷道的围岩强度,治理方案能够满足巷道安全掘进的需要。
In order to ensure that the return air tunnel in Longwanggou Coal Mine safely passes through the fault that conducts pressure water and blocks the water channel between Ordovician limestone water and the tunnel, to effectively improve the rock strength in the fracture zone of the fault and avoid fault hysteretic water inrush and roof fall accidents caused by the fault, the technology of tunnel passing through the fault was studied by the method of grouting rock strata within 10 m to 30 m below the limestone roof interface of Ordovician period and surrounding rock curtain grouting of the roadway in the fault fracture zone. After the tunnel passes through the fault, the roof of the tunnel in this section has only a small amount of leaching water, and the total amount of leaching water is only 0.5 m3/h. The results show that through grouting treatment of the fault, the channel of Ordovician limestone water is effectively blocked, and the surrounding rock strength of the tunnel is improved, and the treatment scheme can meet the needs of the tunnel safety.
In order to ensure that the return air tunnel in Longwanggou Coal Mine safely passes through the fault that conducts pressure water and blocks the water channel between Ordovician limestone water and the tunnel, to effectively improve the rock strength in the fracture zone of the fault and avoid fault hysteretic water inrush and roof fall accidents caused by the fault, the technology of tunnel passing through the fault was studied by the method of grouting rock strata within 10 m to 30 m below the limestone roof interface of Ordovician period and surrounding rock curtain grouting of the roadway in the fault fracture zone. After the tunnel passes through the fault, the roof of the tunnel in this section has only a small amount of leaching water, and the total amount of leaching water is only 0.5 m3/h. The results show that through grouting treatment of the fault, the channel of Ordovician limestone water is effectively blocked, and the surrounding rock strength of the tunnel is improved, and the treatment scheme can meet the needs of the tunnel safety.
引文
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[2]王立伟,靳子栋.大型断层下盘奥灰顶段及断层带注浆加固技术[J].煤炭与化工,2015,38(2):19-20.
[3]邢鹏飞,王恩营.煤矿断层突水问题的研究现状与展望[J].煤,2015,24(10):59-61.
[4]黄河,李敏,许光泉.断层带对巷道工程影响分析[J].煤炭工程,2010,42(1):34-36.
[5]黄成光,于敦荣.公路隧道施工[M].北京:人民交通出版社,2001.
[6]杨会军,胡春林,谌文武,等.断层及其破碎带隧道信息化施工[J].岩石力学与工程学报,2004(22):3917.
[7]宋彦波,高全臣.有机高水材料注浆堵水机理研究[J].采矿与安全工程学报,2006,23(3):320-323.
[8]刘勇.断层破碎带中巷道注浆加固设计与实践[J].煤矿开采,2012,17(6):56-58.
[9]邹光华,张凤岩,宋彦波.巷道过含水断层破碎带的注浆加固技术[J].煤炭科学技术,2010,38(6):50-53.
[10]刘长武,陆士良.水泥注浆加固对工程岩体的作用与影响[J].中国矿业大学学报,2000,29(5):454-458.