特厚煤层综放工作面大断面切眼支护技术
|
摘要
为了解决塔山煤矿综放工作面跨度10 m切眼的支护难题,采用理论分析、数值计算方法确定了大跨度切眼的支护形式为高强度锚杆、组合锚索、W钢带、金属网、混凝土联合支护,以形成群锚封闭效应,维护切眼巷道围岩的稳定性和安全性。试验中锚索锚固力达140~160 kN,锚固区内顶板最大离层值7 mm,顶底板移近量最大值38 mm,试验结果表明,设计提出的锚杆-组合锚索-混凝土支护提高了支护结构的整体承载力,有效控制了切眼巷道围岩的变形,保证了大断面切眼的安全使用。
In order to solve the support difficulty of the open-off cut with a span of 10 m for the fully mechanized top coal caving mining face in Tashan Mine,the theoretical analysis and the numerical calculation method was applied to set up the high strength bolt,the built-up anchor,the W steel band,the steel mesh and the concrete combined support as the large span open-off cut support mode in order to form a group bolt closed effect and to keep the surrounding rock stability of the open-off cut and the safety.During the test,the anchorage force of the anchor reached at 140~160 kN,the max separation value of the roof in the anchorage zone was 7 mm and the max convergence value between the roof and floor was 38 mm.The test results showed that the bolt-built-up anchor-concrete combined support proposed in the design could improve the integrated bearing force of the support structure,could effectively control the surrounding rock deformation of the open-off cut and could ensure the safety application of the large cross section open-off cut.
In order to solve the support difficulty of the open-off cut with a span of 10 m for the fully mechanized top coal caving mining face in Tashan Mine,the theoretical analysis and the numerical calculation method was applied to set up the high strength bolt,the built-up anchor,the W steel band,the steel mesh and the concrete combined support as the large span open-off cut support mode in order to form a group bolt closed effect and to keep the surrounding rock stability of the open-off cut and the safety.During the test,the anchorage force of the anchor reached at 140~160 kN,the max separation value of the roof in the anchorage zone was 7 mm and the max convergence value between the roof and floor was 38 mm.The test results showed that the bolt-built-up anchor-concrete combined support proposed in the design could improve the integrated bearing force of the support structure,could effectively control the surrounding rock deformation of the open-off cut and could ensure the safety application of the large cross section open-off cut.
引文
[1]吴永平.大同矿区特厚煤层综放采场矿压显现规律研究[J].煤炭科学技术,2008,36(1):8-10.
[2]黄庆国.塔山煤矿特厚煤层综放开采关键技术[J].煤炭科学技术,2009,37(2):22-24.
[3]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7):872-874.
[4]王金华.中国煤矿现代化开采技术装备现状及展望[J].煤炭科学技术,2011,39(1):1-5.
[5]侯朝炯,郭励生,勾攀峰.煤巷锚杆支护[M].徐州:中国矿业大学出版社,1999.
[6]康红普.煤巷锚杆支护成套技术研究与实践[J].岩石力学与工程学报,2005,24(11):3959-3964.
[7]陈炎光,陆士良.中国煤矿巷道围岩控制[M].徐州:中国矿业大学出版社,1994.
[8]侯朝炯,柏建彪,张农.困难复杂条件下的煤巷锚杆支护[J].岩土工程学报,2001,23(1):84-88.
[2]黄庆国.塔山煤矿特厚煤层综放开采关键技术[J].煤炭科学技术,2009,37(2):22-24.
[3]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7):872-874.
[4]王金华.中国煤矿现代化开采技术装备现状及展望[J].煤炭科学技术,2011,39(1):1-5.
[5]侯朝炯,郭励生,勾攀峰.煤巷锚杆支护[M].徐州:中国矿业大学出版社,1999.
[6]康红普.煤巷锚杆支护成套技术研究与实践[J].岩石力学与工程学报,2005,24(11):3959-3964.
[7]陈炎光,陆士良.中国煤矿巷道围岩控制[M].徐州:中国矿业大学出版社,1994.
[8]侯朝炯,柏建彪,张农.困难复杂条件下的煤巷锚杆支护[J].岩土工程学报,2001,23(1):84-88.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心