弱黏结薄层复合顶板煤巷支护与围岩控制技术
发布时间：2018-11-08 10:15
【摘要】：本文结合鄂尔多斯色连二矿某工作面运输顺槽巷道工程地质条件,针对弱黏结薄层复合顶板巷道支护中发生的各种问题,采取理论与现场相结合,并使用数值模拟计算分析,对弱黏结薄层复合顶板巷道围岩破坏状况、变形破坏机理及支护控制技术进行了研究。 通过工程地质研究,分析了运输顺槽弱黏结软岩巷道工程条件,对薄层复合顶板统计了在原支护形式下的巷道变形破坏规律。通过对巷道进行现场观测,对巷道围岩的变形特征进行了总结分析。 采用FLAC3D数值模拟软件,建立工程计算力学模型,模拟了运输顺槽中巷道围岩损坏形变情况,分析了巷道围岩失稳情况,同时运用软岩工程力学等理论对巷道支护荷载进行计算,并确定了影响巷道稳定性的主要因素。 通过对运输顺槽破坏机理研究分析,结合巷道控制原则,运用FLAC3D软件模拟比较了巷道矩形、拱形和圆角平顶矩形三个断面,确定了巷道断面形状,提出了以锚杆加固中部与锚索深部承载结构相结合为核心的弱黏结薄层复合顶板巷道稳定性控制新技术,阐述了新技术中各加固拱作用机理,并通过数值模拟证实了煤巷控制技术的合理性和可靠性。 通过现场工程实践,表明联合加固结构支护技术有效地控制了运输顺槽巷道围岩变形破坏,维护和保持了巷道的稳定。
[Abstract]:According to the engineering geological conditions of transportation roadway in a working face of Ordos Selian No.2 Mine, aiming at the various problems occurred in the support of weakly bonded thin layer composite roof roadway, this paper combines the theory with the field, and uses numerical simulation to calculate and analyze. The failure state of surrounding rock, deformation failure mechanism and support control technology of weakly bonded thin-layer composite roof roadway are studied. Through engineering geology research, the engineering conditions of weakly bonded soft rock roadway in transport channel are analyzed, and the deformation and failure law of roadway under the original supporting form is analyzed for thin layer composite roof. The deformation characteristics of surrounding rock of roadway are summarized and analyzed by field observation of roadway. In this paper, the numerical simulation software FLAC3D is used to establish the engineering computational mechanics model, to simulate the damage and deformation of the surrounding rock in the roadway along the channel, to analyze the instability of the surrounding rock of the roadway, and to calculate the supporting load of the roadway by using the theory of engineering mechanics of soft rock. The main factors influencing the stability of roadway are determined. Through the study and analysis of the failure mechanism of transportation along the channel, combined with the principle of roadway control, using FLAC3D software to simulate and compare three sections of roadway rectangular, arch and rounded flat-top rectangle, the section shape of roadway is determined. In this paper, a new technique for stability control of weakly bonded thin-layer composite roof roadway is put forward, which is based on the combination of the central part of anchor reinforcement and the deep bearing structure of anchor cable, and the action mechanism of each reinforced arch in the new technology is expounded. The rationality and reliability of coal roadway control technology are verified by numerical simulation. Through the field engineering practice, it is shown that the combined reinforcement structure support technology can effectively control the surrounding rock deformation and damage of the roadway along the channel and maintain the stability of the roadway.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
本文编号：2318167
[Abstract]:According to the engineering geological conditions of transportation roadway in a working face of Ordos Selian No.2 Mine, aiming at the various problems occurred in the support of weakly bonded thin layer composite roof roadway, this paper combines the theory with the field, and uses numerical simulation to calculate and analyze. The failure state of surrounding rock, deformation failure mechanism and support control technology of weakly bonded thin-layer composite roof roadway are studied. Through engineering geology research, the engineering conditions of weakly bonded soft rock roadway in transport channel are analyzed, and the deformation and failure law of roadway under the original supporting form is analyzed for thin layer composite roof. The deformation characteristics of surrounding rock of roadway are summarized and analyzed by field observation of roadway. In this paper, the numerical simulation software FLAC3D is used to establish the engineering computational mechanics model, to simulate the damage and deformation of the surrounding rock in the roadway along the channel, to analyze the instability of the surrounding rock of the roadway, and to calculate the supporting load of the roadway by using the theory of engineering mechanics of soft rock. The main factors influencing the stability of roadway are determined. Through the study and analysis of the failure mechanism of transportation along the channel, combined with the principle of roadway control, using FLAC3D software to simulate and compare three sections of roadway rectangular, arch and rounded flat-top rectangle, the section shape of roadway is determined. In this paper, a new technique for stability control of weakly bonded thin-layer composite roof roadway is put forward, which is based on the combination of the central part of anchor reinforcement and the deep bearing structure of anchor cable, and the action mechanism of each reinforced arch in the new technology is expounded. The rationality and reliability of coal roadway control technology are verified by numerical simulation. Through the field engineering practice, it is shown that the combined reinforcement structure support technology can effectively control the surrounding rock deformation and damage of the roadway along the channel and maintain the stability of the roadway.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
【参考文献】
相关期刊论文 前10条
1 何满潮;杨军;齐干;王树仁;;深部软岩巷道耦合支护优化设计及应用[J];辽宁工程技术大学学报;2007年01期
2 冯豫;我国软岩巷道支护的研究[J];矿山压力与顶板管理;1990年02期
3 郭忠平,何希林;复合顶煤巷锚带网加锚索联合支护[J];矿山压力与顶板管理;2000年01期
4 崔树彬,宋召谦;复合顶板煤巷组合锚杆支护技术[J];矿山压力与顶板管理;2000年04期
5 涂敏;张向阳;张华磊;;下保护层开采对上覆煤巷的动态影响及控制研究[J];采矿与安全工程学报;2008年04期
6 黄升宏;复合顶板巷道支护[J];矿山压力与顶板管理;1996年01期
7 李芳成,孙广义,李风仪,张东日,张国华;层状复合岩层回采巷道锚杆支护[J];矿山压力与顶板管理;1997年02期
8 侯朝炯;Review of roadway control in soft surrounding rock under dynamic pressure[J];Journal of Coal Science & Engineering(China);2003年01期
9 朱效嘉;;锚杆支护理论进展[J];光爆锚喷;1996年01期
10 岳中文;杨仁树;闫振东;张耀辉;韩朋飞;;复合顶板大断面煤巷围岩稳定性试验研究[J];煤炭学报;2011年S1期
，本文编号：2318167
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2318167.html
