大断面综放沿空巷道煤柱合理宽度与围岩控制

doi:10.16285/j.rsm.2016.06.024

›› 2016, Vol. 37 ›› Issue (6): 1721-1728.doi: 10.16285/j.rsm.2016.06.024

大断面综放沿空巷道煤柱合理宽度与围岩控制

张广超，何富连

中国矿业大学（北京）资源与安全工程学院，北京 100083

收稿日期:2015-08-31 出版日期:2016-06-13 发布日期:2018-06-09
作者简介:张广超，男，1987年生，博士研究生，主要从事资源开采理论与技术、矿山压力与岩层控制、岩石力学与工程方面的研究。
基金资助:
国家自然科学基金资助项目（No.51234005）；中央高校基本科研业务费专项资金资助（No.2010YZ02）

Pillar width determination and surrounding rocks control of gob-side entry with large cross-section and fully-mechanized mining

ZHANG Guang-chao, HE Fu-lian

College of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China

Received:2015-08-31 Online:2016-06-13 Published:2018-06-09
Supported by:
This work was supported by the National Natural Science Foundation of China (51234005) and the Fundamental Research Funds for the Central Universities (2010YZ02).

摘要/Abstract

摘要： 确定合理的区段煤柱宽度及巷道支护型式和参数，对于提高资源回采率和巷道安全性及实现综放开采高产高效意义重大。以王家岭煤矿20103区段运输平巷为工程背景，采用FLAC3D数值分析了不同煤柱宽度下围岩主应力差、变形及破坏演化规律，认为合理煤柱宽度为6～10 m，并结合实际地质和生产条件确定试验巷道煤柱宽度为8 m。采用理论分析和现场钻孔窥视方法综合确定基本顶断裂线位于距采空区约7 m处，认为由于综放沿空巷道围岩性质结构和应力分布沿巷道中心线呈明显非对称性，将引发煤柱侧顶板严重下沉和肩角部位煤岩体错位、嵌入、台阶下沉等非对称破坏特征，靠煤柱侧顶板及肩角部位是巷道变形破坏的关键部位。在此研究基础上，针对性地提出了以高强锚梁网、不对称锚梁、锚索桁架为主体的综合控制技术，详细阐明了具体支护措施的控制机制，并进行现场应用。工程实践表明，8 m煤柱宽度合理，该支护技术能够保证窄煤柱沿空巷道围岩稳定，并已在王家岭煤矿大面积推广应用，对类似工程条件的支护技术具有一定的理论意义和实用价值。

关键词: 主应力差, 煤柱宽度, 大断面, 非对称性, 沿空掘巷, 锚索桁架

Abstract: To improve the coal recovery rate, it is crucial to properly determine the coal pillar size, supporting patterns and parameters of the roadway, since this can ensure the stable of butt entry with fully-mechanized mining. The evolution of principal stresses, deformation and failure are studied using FLAC3D with different pillar widths in haulage roadway 20103 of Wangjialing coal mine. It is shown that the most reasonable and economic pillar widths range from 6 m to 10 m. The final reasonable pillar width is determined to be 8 m based on the geological production conditions. Theoretical analysis and borehole observation show that the main roof breaks at 7 m next to the gob. The property and structure of the surrounding rock and the stress distribution are asymmetric along the axis of roadway, resulting in asymmetric roof strata behaviors including the subsidence of roof near the pillar and even the dislocation, embedding, step convergence of rock on the abutment of coal mine. The roof near the pillar and the abutment of coal mine are the key positions of deformation failure. A comprehensive supporting technology is proposed including high strength anchor-beam-net, asymmetric cable-beam and cable truss. The mechanism of supporting measures for surrounding rock is analyzed. It is shown that the pillar width with 8 m is reasonable and the proposed measure can control the asymmetric deformation failure. The proposed supporting measure has been successfully applied to Wangjialing mine area.

Key words: principal stress difference, pillar width, large cross-section, asymmetry, gob-side entry, cable truss

中图分类号:

TD 823

张广超，何富连. 大断面综放沿空巷道煤柱合理宽度与围岩控制[J]. , 2016, 37(6): 1721-1728.

ZHANG Guang-chao, HE Fu-lian. Pillar width determination and surrounding rocks control of gob-side entry with large cross-section and fully-mechanized mining[J]. , 2016, 37(6): 1721-1728.

参考文献

相关文章 15

[1]	李栋, 卢义玉, 荣耀, 周东平, 郭臣业, 张尚斌, 张承客, . 基于定向水力压裂增透的大断面瓦斯隧道快速揭煤技术[J]. 岩土力学, 2019, 40(1): 363-369.
[2]	崔德山, 陈琼, 项伟, 王菁莪, . 黄土坡滑坡饱和滑带土三轴压缩应力松弛试验研究[J]. 岩土力学, 2018, 39(S2): 209-216.
[3]	王朋飞，冯国瑞，赵景礼，Yoginder P. Chugh ，王志强,. 长壁工作面巷顶沿空掘巷围岩应力分析[J]. , 2018, 39(9): 3395-3405.
[4]	刘聪，李术才，周宗青，李利平，王康，侯福金, 秦承帅，高成路,. 复杂地层超大断面隧道施工围岩力学特征模型试验[J]. , 2018, 39(9): 3495-3504.
[5]	江贝，李术才，王琦，王富奇，张若祥，. 基于上限法的深部大断面回采巷道顶板锚索设计方法研究[J]. , 2017, 38(8): 2351-2354.
[6]	张元超，杨圣奇，陈淼，臧传伟，龙景奎，. 深井综放沿空掘巷实体煤帮变形破坏机制及控制技术[J]. , 2017, 38(4): 1103-1113.
[7]	刘泉声，彭星新，雷广峰，王俊涛，张静，肖龙鸽4. 特大断面浅埋暗挖隧道十字岩柱开挖技术模型试验研究[J]. , 2017, 38(10): 2780-2788.
[8]	沈威，窦林名，刘鹏，贺虎, . 沿空掘巷应力动态变化规律研究[J]. , 2016, 37(S1): 489-494.
[9]	关振长，龚振峰，罗志彬，陈仁春，何川，. 特大断面隧道地震动力特性的振动台试验研究[J]. , 2016, 37(9): 2553-2560.
[10]	许锡昌，陈善雄，姜领发. 斜坡地基附加应力分布规律模型试验及数值模拟[J]. , 2015, 36(S2): 267-273.
[11]	李雪，周顺华，宫全美，陈长江, . 大断面深埋高水压地铁盾构隧道周边土压力作用模式评价[J]. , 2015, 36(5): 1415-1420.
[12]	江贝，李术才，王琦，朱维申，王德超，王富奇，王洪涛，阮国强，邵行,. 基于非连续变形分析方法的深部沿空掘巷围岩变形破坏及控制机制对比研究[J]. , 2014, 35(8): 2353-2360.
[13]	何富连，王晓明，许磊，吴焕凯，王军. 大断面切眼主应力差转移规律及支护技术[J]. , 2014, 35(6): 1703-1710.
[14]	何历超，王梦恕，李宇杰 , . 浅埋大跨小间距黄土隧道支护技术研究[J]. , 2013, 34(S2): 306-310.
[15]	彭林军，张东峰，郭志飚，段庆伟，. 特厚煤层小煤柱沿空掘巷数值分析及应用[J]. , 2013, 34(12): 3609-3616.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

大断面综放沿空巷道煤柱合理宽度与围岩控制

Pillar width determination and surrounding rocks control of gob-side entry with large cross-section and fully-mechanized mining

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0