林南仓矿深部高应力软岩巷硐群支护技术研究
发布时间：2019-06-22 17:39
【摘要】：近年来随着开采深度的不断增加,煤矿开采转入深部,由于高地温、高地压、高岩溶水压影响,深部岩体的组织结构、基本特征发生根本性变化。从而出现了大批很难控制的巷道围岩,其中包含埋藏于深部的高应力软岩巷道,围岩松软破碎的巷道,受强烈采动压力影响的巷硐群以及特大断面巷硐等。巷道往往需要多次维修与翻修,其安全得不到保证,灾变事故多发,给煤矿安全高效生产造成极大威胁。鉴于此,对处于深部的高应力软岩巷硐群围岩的支护控制技术的研究具有十分重要的意义。大断面巷硐群作为永久工程,其支护质量历来是开拓工程的难点,因此探索科学合理的软岩大断面巷硐群围岩控制机理与稳定支护技术是一项亟待解决的难题。以林南仓矿-850水平回风斜井和皮带斜井间的高应力软岩巷硐群为主要研究对象,对其所处的高应力环境、特殊的岩性条件、围岩体层状构造以及硐室群空间位置结构等多个角度进行测试分析和研究。通过采用微观分析、物理力学实验、理论计算相结合的方法,掌握了-850水平高应力软岩巷硐群典型围岩的物理力学性能;基于剪涨效应的SALENCON公式确定了饱水和无水条件下5类巷道的塑性区厚度,提出了超大断面巷道错开布置、小断面交叉过渡等降低临近扰动的优化方法;采用ANSYS和FLAC3D两种数值模拟软件,进行了复杂巷硐群的稳定性评估,构建了-850斜井区域的4类复杂交叉巷硐群模型,创新了马蹄形浅拱底梁支架、锚杆固棚方式、双层棚子壁后充填、双层布筋全断面浇筑等软岩治理技术,形成了“优化+改善+反馈”的变形控制技术。通过开展支护技术分段设计和支护参数的全面优化,确保了在施工安全前提下,实现支护投入经济合理、施工循环安全有序、巷硐断面稳定保持的技术要求;为深部区域的软岩巷道及硐室群施工提供全面的理论支撑和技术指导,为后续巷硐群间距、层位及支护参数设计提供指导,为具有同类地质条件的软岩巷硐群围岩稳定性控制提供了借鉴。
[Abstract]:In recent years, with the continuous increase of mining depth, coal mining has gone to deep. Due to the influence of high ground temperature, high pressure and high Karst water pressure, the organizational structure and basic characteristics of deep rock mass have undergone fundamental changes. As a result, there are a large number of roadway surrounding rocks that are difficult to control, including high stress soft rock roadway buried in deep part, soft broken roadway with surrounding rock, roadway group affected by strong mining pressure and super large section roadway. Roadway often needs many maintenance and renovation, its safety can not be guaranteed, disaster accidents occur frequently, which poses a great threat to the safe and efficient production of coal mines. In view of this, it is of great significance to study the supporting control technology of surrounding rock of high stress soft rock roadway group in deep part. As a permanent project, the supporting quality of large section roadway group has always been a difficult point in development engineering, so it is an urgent problem to explore scientific and reasonable surrounding rock control mechanism and stable support technology of large section roadway group in soft rock. Taking the high stress soft rock roadway group between the horizontal return air inclined well and belt inclined shaft in Linnancang Mine as the main research object, the high stress environment, special lithologic conditions, layered structure of surrounding rock body and spatial position structure of chamber group are tested and analyzed. By using the method of microscopic analysis, physical and mechanical experiment and theoretical calculation, the physical and mechanical properties of typical surrounding rock of soft rock roadway group with high stress at-850 level are mastered, the thickness of plastic zone of five kinds of roadway under saturated and anhydrous conditions is determined by SALENCON formula based on shear effect, and the optimization methods of reducing adjacent disturbance, such as staggered arrangement of super large section roadway and cross transition of small section, are put forward. Using ANSYS and FLAC3D numerical simulation software, the stability evaluation of complex roadway group is carried out, four kinds of complex cross roadway group models in inclined shaft area are constructed, and the soft rock treatment techniques such as horseshoe shallow arch bottom beam support, bolt fixing shed, double layer shed filling, double layer reinforcement full section pouring and so on are innovated, and the deformation control technology of "optimizing and improving feedback" is formed. By carrying out the segmented design of support technology and the overall optimization of support parameters, the technical requirements of economical and reasonable support input, safe and orderly construction cycle and stable roadway section are ensured under the premise of construction safety. It provides comprehensive theoretical support and technical guidance for the construction of soft rock roadway and chamber group in deep area, provides guidance for the design of tunnel group spacing, horizon and support parameters, and provides a reference for the stability control of surrounding rock of soft rock roadway group with similar geological conditions.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353
本文编号：2504818
[Abstract]:In recent years, with the continuous increase of mining depth, coal mining has gone to deep. Due to the influence of high ground temperature, high pressure and high Karst water pressure, the organizational structure and basic characteristics of deep rock mass have undergone fundamental changes. As a result, there are a large number of roadway surrounding rocks that are difficult to control, including high stress soft rock roadway buried in deep part, soft broken roadway with surrounding rock, roadway group affected by strong mining pressure and super large section roadway. Roadway often needs many maintenance and renovation, its safety can not be guaranteed, disaster accidents occur frequently, which poses a great threat to the safe and efficient production of coal mines. In view of this, it is of great significance to study the supporting control technology of surrounding rock of high stress soft rock roadway group in deep part. As a permanent project, the supporting quality of large section roadway group has always been a difficult point in development engineering, so it is an urgent problem to explore scientific and reasonable surrounding rock control mechanism and stable support technology of large section roadway group in soft rock. Taking the high stress soft rock roadway group between the horizontal return air inclined well and belt inclined shaft in Linnancang Mine as the main research object, the high stress environment, special lithologic conditions, layered structure of surrounding rock body and spatial position structure of chamber group are tested and analyzed. By using the method of microscopic analysis, physical and mechanical experiment and theoretical calculation, the physical and mechanical properties of typical surrounding rock of soft rock roadway group with high stress at-850 level are mastered, the thickness of plastic zone of five kinds of roadway under saturated and anhydrous conditions is determined by SALENCON formula based on shear effect, and the optimization methods of reducing adjacent disturbance, such as staggered arrangement of super large section roadway and cross transition of small section, are put forward. Using ANSYS and FLAC3D numerical simulation software, the stability evaluation of complex roadway group is carried out, four kinds of complex cross roadway group models in inclined shaft area are constructed, and the soft rock treatment techniques such as horseshoe shallow arch bottom beam support, bolt fixing shed, double layer shed filling, double layer reinforcement full section pouring and so on are innovated, and the deformation control technology of "optimizing and improving feedback" is formed. By carrying out the segmented design of support technology and the overall optimization of support parameters, the technical requirements of economical and reasonable support input, safe and orderly construction cycle and stable roadway section are ensured under the premise of construction safety. It provides comprehensive theoretical support and technical guidance for the construction of soft rock roadway and chamber group in deep area, provides guidance for the design of tunnel group spacing, horizon and support parameters, and provides a reference for the stability control of surrounding rock of soft rock roadway group with similar geological conditions.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353
【参考文献】
相关期刊论文 前10条
1 王卫军;袁超;余伟健;赵延林;彭文庆;吴海;彭刚;屈延嗣;;深部高应力巷道围岩预留变形控制技术[J];煤炭学报;2016年09期
2 李建民;耿清友;刘红旗;;泥质软岩巷道支护技术研究与实践[J];煤矿开采;2016年04期
3 范鹏贤;王明洋;方向;;深部工程模型试验的边界条件及其模拟方法探讨[J];采矿与安全工程学报;2016年01期
4 刘建庄;杨忠东;刘树第;郭立稳;;浅拱底梁支架底鼓控制技术研究[J];采矿与安全工程学报;2015年04期
5 蒋斌松;杨乐;龙景奎;;基于对数应变的圆形巷道围岩开挖应力分析[J];中国矿业大学学报;2012年05期
6 李树清;龙祖根;罗卫东;解庆雪;赵训;;煤层群下保护层开采保护范围的数值模拟[J];中国安全科学学报;2012年06期
7 焦春茂;;岩体工程黏性流动变形预测的无边界条件方法研究[J];科学技术与工程;2011年30期
8 刘建庄;张农;郑西贵;王宝贵;;U型钢支架偏纵向受力及屈曲破坏分析[J];煤炭学报;2011年10期
9 李忠华,官福海,潘一山;基于损伤理论的圆形巷道围岩应力场分析[J];岩土力学;2004年S2期
10 刘传孝,王同旭,杨永杰;高应力区巷道围岩破碎范围的数值模拟及现场测定的方法研究[J];岩石力学与工程学报;2004年14期
相关博士学位论文 前2条
1 张金松;深部巷道局部弱支护效应分析与围岩控制技术研究[D];安徽理工大学;2015年
2 王襄禹;高应力软岩巷道有控卸压与蠕变控制研究[D];中国矿业大学;2008年
相关硕士学位论文 前5条
1 贾志;大断面巷道软岩破碎顶板支护技术研究[D];河北工程大学;2014年
2 杜杰;井下煤流矸石跳汰分选关键技术研究与应用[D];中国矿业大学;2014年
3 胡敏军;深部高应力软岩巷道时效变形机理研究[D];中国矿业大学;2015年
4 宫坚;高应力区泥质软岩巷道变形控制技术研究[D];河北联合大学;2014年
5 寇永嘉;大断面巷道硐室围岩控制及锚固支护技术研究[D];太原理工大学;2011年
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