窄煤柱沿空掘巷锚杆支护及矿压监测技术
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摘要
为了解决某矿7806回风巷窄煤柱沿空掘巷支护问题,设计采用预应力全长锚固强力锚杆锚索组合支护系统,并采用综合矿压监测技术结合日常监测,分析巷道稳定情况,及时变更补强了支护设计。通过矿压监测发现两帮尤其是窄煤柱帮变形较大,随着远离工作面,巷道趋于稳定,约600 m后巷道变形大幅减小,稳定周期缩短,预应力全长锚固组合支护系统在窄煤柱沿空掘巷实际应用中能起到较好的效果,保证了巷道掘进安全。
To solve the supporting problem of roadway driving along next goaf in the 7806 return airway of a coal mine,the whole prestressed anchor bolts combined supporting system is designed,and the roadway stability,as well as the supporting design could be analyzed and increased in time respectively by way of utilizing the integrated pressure monitor technology combined with daily monitor.The monitoring of the mine pressure helps to detect that the two gangs,especially the narrow coal pillars,have a large deformation.Along with keeping far away from the working face,the roadway tends to be stable.When approaching to 600 m,the deformation of the roadway is dramatically reduced,and the stability period is shortened.The whole prestressed combined supporting system plays an important role in practical application of the narrow coal pillar along the roadway driving.Furthermore,it brings about roadway excavation safety,which would play a guiding role for future work.
To solve the supporting problem of roadway driving along next goaf in the 7806 return airway of a coal mine,the whole prestressed anchor bolts combined supporting system is designed,and the roadway stability,as well as the supporting design could be analyzed and increased in time respectively by way of utilizing the integrated pressure monitor technology combined with daily monitor.The monitoring of the mine pressure helps to detect that the two gangs,especially the narrow coal pillars,have a large deformation.Along with keeping far away from the working face,the roadway tends to be stable.When approaching to 600 m,the deformation of the roadway is dramatically reduced,and the stability period is shortened.The whole prestressed combined supporting system plays an important role in practical application of the narrow coal pillar along the roadway driving.Furthermore,it brings about roadway excavation safety,which would play a guiding role for future work.
引文
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[2]柏建彪.沿空掘巷围岩控制[M].徐州:中国矿业大学出版社,2006.
[3]李学华.综放沿空掘巷围岩稳定控制原理与技术[M].徐州:中国矿业大学出版社,2008.
[4]陈炎光,钱鸣高.中国煤矿采场围岩控制[M].徐州:中国矿业大学出版社,1994.
[5]柏建彪,侯朝炯,黄汉富.沿空掘巷窄煤柱稳定性数值模拟研究[J].岩石力学与工程学报,2004,23(20):3475-3479.
[6]郑西贵,姚志刚,张农.掘采全过程沿空掘巷小煤柱应力分布研究[J].采矿与安全工程学报,2012,29(4):459-465.
[7]侯朝炯,郭励生,勾攀峰.煤巷锚护支护[M].徐州:中国矿业大学出版社,1999.12-16.
[8]柏建彪,王卫军,侯朝炯.综放沿空掘巷围岩控制机理及支护技术研究[J].煤炭学报,2000,25(5):478-480.
[9]李磊,柏建彪,王襄禹.综放沿空掘巷合理位置及控制技术[J].煤炭学报,2012,37(9):1564-1569.
[10]郑西贵.煤矿巷道锚杆锚索托锚力演化机理及围岩控制技术[D].徐州:中国矿业大学,2013.
[11]李秀文.深部复杂困难巷道控制技术研究[J].煤,2013,22(11):37-40.
[12]蔡光顺.放顶煤大断面切眼锚杆支护技术的应用[J].山西煤炭,2003,23(4):19-21.
[13]贺天才.切眼大断面锚杆支护技术的应用[J].山西煤炭,2002,22(4):29-32.