沿空留巷矸石墙代替煤柱喷浆控制技术
Research on Shotcrete Control Technology for Replacing Coal Pillars by Gangue Wall Along Gob Side
-
摘要: 针对深井高应力巷道沿空留巷围岩控制困难的问题,提出了沿空留巷矸石墙代替煤柱喷浆控制技术。通过袋装矸石砌筑成墙作为沿空留巷的承载隔离墙,对袋装矸石墙表面喷射纤维混凝土,以提高矸石墙的承载能力。通过数值模拟研究矸石墙宽度、喷浆层厚度和钢纤维掺量对矸石墙垂直应力和变形的影响。结果表明:最佳矸石墙宽度为3.0 m,最佳喷浆层厚度为70 mm,最佳钢纤维掺量为60 kg/m3。通过现场观测得出巷道顶板最大下沉量为88 mm,说明沿空留巷矸石墙代替煤柱喷浆控制技术能够有效控制顶板岩层。Abstract: In view of the difficulty in controlling surrounding rock in high-stress roadway along gob, this paper proposes the technology of replacing coal pillar shotcrete along the empty roadway by gangue wall. The bagged gangue masonry wall is used as the bearing isolation wall along the roadway. The fiber concrete is sprayed on the surface of the bagged stone wall to improve the bearing capacity of the wall. The effects of the width of the gangue wall, the thickness of the sprayed layer and the amount of steel fiber on the vertical stress and deformation of the gangue wall were studied by numerical simulation. The results showed that the optimal wall width was 3.0 m. The optimum spray layer thickness was 70 mm. The optimum steel fiber content was 60 kg/m3. Through on-site observation, the maximum deformation of the roof of the roadway was 88 mm, which indicates that the shotcrete control technology for gangue wall replacing coal pillars along gob side can effectively control the roof rock formation.
-
-
[1] 彭赐灯.矿山压力与岩层控制研究热点最新进展评述[J].中国矿业大学学报,2015,44(1):1-8. [2] 刘建功.煤矿充填开采岩层控制理论与技术新进展[J].煤炭与化工,2015,38(3):1-4. [3] 刘建功,赵家巍,李蒙蒙,等.煤矿充填开采连续曲形梁形成与岩层控制理论[J].煤炭学报,2016,41(2):383-391. [4] 傅京昱.煤矿支护设备与岩层控制技术标准体系研究[J].煤炭工程,2016,48(5):1-3. [5] 黄庆享.浅埋煤层保水开采岩层控制研究[J].煤炭学报,2017,42(1):50-55. [6] 冯吉成,马念杰,赵志强,等.深井大采高工作面沿空掘巷窄煤柱宽度研究[J].采矿与安全工程学报,2014, 31(4):580-586. [7] 余学义,王琦,赵兵朝,等.大采高双巷布置工作面巷间煤柱合理宽度研究[J].岩石力学与工程学报,2015, 34(S1):3328-3336. [8] 张明,姜福兴,李家卓,等.基于巨厚岩层-煤柱协同变形的煤柱稳定性[J].岩土力学,2018,39(2):705. [9] 黄庆享,杜君武.浅埋煤层群开采的区段煤柱应力与地表裂缝耦合控制研究[J].煤炭学报,2018,43(3):591-598. [10] 唐宗明.基于FLAC(3D)的混凝土替代护巷煤柱研究[J].煤炭技术,2016,35(9):58-60. [11] 兰虎虎.护巷混凝土支撑体设计与效果考察[J].煤,2017,26(5):20-22. [12] 余伟健,王卫军.矸石充填整体置换“三下”煤柱引起的岩层移动与二次稳定理论[J].岩石力学与工程学报,2011,30 (1):105-112. [13] 田文元,成云海,邹成松,等.干、湿喷混凝土和湿喷仿钢纤维混凝土强度性能比较分析[J].混凝土,2018(1):158-160. [14] 曹康建.湿喷钢纤维混凝土在隧道单层衬砌中的应用[J].水利与建筑工程学报,2011,9(3):83-86. [15] 程伟峰,林星平,丁一宁,等.掺硅粉、钢纤维湿喷混凝土的工程应用研究[J].岩石力学与工程学报,2011,30(11):2321-2329.
计量
- 文章访问数: 121
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
