厚煤层无煤柱自成巷柔模混凝土支护技术
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摘要
针对配套挡矸支架作为巷旁支护初期投入成本过高的问题,结合柠条塔S1201-II工作面切顶卸压自成巷技术现场实践,研究决定当巷道围岩变形基本稳定后采用柔模混凝土柱替换挡矸支架作为巷旁支护。并根据柔模混凝土柱的参数对其进行承载力验算,使柔模混凝土柱满足巷道稳定性要求。同时阐述了柔模混凝土柱的现场施工工艺,并通过结合成巷效果和围岩变形监测数据,证实了使用柔模混凝土柱替换挡矸支架作为巷旁支护的可行性,留巷效果好,减少了初期投入成本,取得了巨大的收益。
Aiming at the excessive cost in the initial investment when using the gangue-blocking support for roadside,combining with the field situation in Ningtiaota S1201-II working face,it is decided that after the basic stability of the roadway surrounding rock deformation has been assured,adopting flexible-formwork concrete columns which has displaced the gangueblocking support for roadside. According to the parameters of flexible-formwork concrete columns,the bearing capacity of the flexible-formwork concrete columns is checked to meet the requirements of roadway stability. At the same time,the field construction technology of flexible-formwork concrete columns is expounded. And by combining the effect of roadway retaining with the monitoring data of surrounding rock deformation,it is proved that the use of flexible-formwork concrete columns which replaced the block gangue bracket as the side entry support is feasible,has good effect of roadway retaining reducing the initial investment costs and has made a huge profit.
Aiming at the excessive cost in the initial investment when using the gangue-blocking support for roadside,combining with the field situation in Ningtiaota S1201-II working face,it is decided that after the basic stability of the roadway surrounding rock deformation has been assured,adopting flexible-formwork concrete columns which has displaced the gangueblocking support for roadside. According to the parameters of flexible-formwork concrete columns,the bearing capacity of the flexible-formwork concrete columns is checked to meet the requirements of roadway stability. At the same time,the field construction technology of flexible-formwork concrete columns is expounded. And by combining the effect of roadway retaining with the monitoring data of surrounding rock deformation,it is proved that the use of flexible-formwork concrete columns which replaced the block gangue bracket as the side entry support is feasible,has good effect of roadway retaining reducing the initial investment costs and has made a huge profit.
引文
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[3]赵鹏,谢凌志,熊伦.无煤柱开采条件下煤岩体支承压力的数值模拟[J].煤炭学报,2011,36(12):2029-2034.
[4]石建军,马念杰,白忠胜.沿空留巷顶板断裂位置分析及支护技术[J].煤炭科学技术,2013,41(7):35-37,42.
[5]王亚军,杨军,高玉兵,等.切顶卸压沿空留巷动压承载临时支护技术研究[J].煤炭工程,2018,50(3):30-36.
[6]田臣,刘英杰.神东矿区沿空留巷应用技术研究[J].煤炭工程,2016,48(S1):50-53.
[7]崔石磊,佘永明,边春林,等.厚煤层柔模沿空留巷工艺在神东矿区的应用[J].煤炭工程,2016,48(1):52-55.
[8]何满潮,宋振骐,王安,等.长壁开采切顶短壁梁理论及其110工法———第三次矿业科学技术变革[J].煤炭科技,2017(1):1-9,13.
[9]马立强,张东升,王红胜,等.厚煤层巷内预置充填带无煤柱开采技术[J].岩石力学与工程学报,2010,29(4):674-680.
[10]杨继元,王晓利,吴玉意,等.柔模混凝土沿空留巷稳定性监测方法应用[J].陕西煤炭,2014,33(6):105-108.
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