清水营煤矿极软岩井底车场支护技术分析
|
摘要
针对清水营煤矿垂深610 m的极软岩井底车场工程,分别使用了"注浆锚杆+高强锚杆"、"U型钢支架+锚注"、钢管混凝土等3种组合支护形式进行了巷道修复和二次支护,综合现场实测和支护成本分析了3种支护的应用效果,提出了深部软岩巷道支护适度"让"和合理"抗"的主要应对策略。"让"压总体变形量主要由地质条件、原岩应力、断面大小和岩体强度综合决定,"抗"的设计应以前一支护的最大形变压力为主要参考值。
In order to assure the shaftstation roadway in extremely soft rock security of Qingshuiying coal mine. Three forms of combined support be used in roadway repair and second supporting at vertical depth of 610 m. and they are grouting bolt combine with high-strength anchor, u-steel support combine with bolt-grouting, concrete filled steel tube. On the basis of site measurement and support cost analysis, supporting measures of deep soft rock roadway was expressed as moderate yielding and reasonable resistance. Total deformation of yielding depend on geological conditions, initial rock stress field, rock mass strength and section size of shaftstation roadway. Design of resistivity should referred to the maximum deformation pressure of the previous support.
In order to assure the shaftstation roadway in extremely soft rock security of Qingshuiying coal mine. Three forms of combined support be used in roadway repair and second supporting at vertical depth of 610 m. and they are grouting bolt combine with high-strength anchor, u-steel support combine with bolt-grouting, concrete filled steel tube. On the basis of site measurement and support cost analysis, supporting measures of deep soft rock roadway was expressed as moderate yielding and reasonable resistance. Total deformation of yielding depend on geological conditions, initial rock stress field, rock mass strength and section size of shaftstation roadway. Design of resistivity should referred to the maximum deformation pressure of the previous support.
引文
[1]柏建彪,王襄禹,贾明魁,等.深部软岩巷道支护原理及应用[J].岩土工程学报,2008,30(5):632-635.
[2]牛双建,靖洪文,张忠宇,等.深部软岩巷道围岩稳定控制技术研究及应用[J].煤炭学报,2011,36(6):914-919.
[3]宗义江,韩立军,郜建明.极破碎软岩巷道失稳机理与动态迭加耦合支护技术研究[J].采矿与安全工程学报,2013,30(3):355-362.
[4]王卫军,彭刚,黄俊.高应力极软破碎岩层巷道高强度耦合支护技术研究[J].煤炭学报,2011,36(2):223-228.
[5]贾后省,王志刚,冯井龙,等.软岩巷道“让压-支护”围岩控制技术与应用[J].煤矿开采,2014,19(4):68-72.
[6]何满潮,孙晓明.中国煤矿软岩巷道工程支护设计与施工指南[M].北京:科学出版社,2004.
[7]靖洪文,李元海,赵宝太,等.软岩工程支护理论与技术[M].徐州:中国矿业大学出版社,2008.
[2]牛双建,靖洪文,张忠宇,等.深部软岩巷道围岩稳定控制技术研究及应用[J].煤炭学报,2011,36(6):914-919.
[3]宗义江,韩立军,郜建明.极破碎软岩巷道失稳机理与动态迭加耦合支护技术研究[J].采矿与安全工程学报,2013,30(3):355-362.
[4]王卫军,彭刚,黄俊.高应力极软破碎岩层巷道高强度耦合支护技术研究[J].煤炭学报,2011,36(2):223-228.
[5]贾后省,王志刚,冯井龙,等.软岩巷道“让压-支护”围岩控制技术与应用[J].煤矿开采,2014,19(4):68-72.
[6]何满潮,孙晓明.中国煤矿软岩巷道工程支护设计与施工指南[M].北京:科学出版社,2004.
[7]靖洪文,李元海,赵宝太,等.软岩工程支护理论与技术[M].徐州:中国矿业大学出版社,2008.