综掘巷道超前支架与围岩相互作用研究
发布时间：2018-09-08 16:15
【摘要】：当前我国综掘巷道掘进过程中冒顶、片帮事故常有发生,特别是在掘进工作面端头施工过程中发生频率很高,长期以来困扰着煤炭工人的生命安全以及煤炭企业的正常生产。研究综掘巷道支架与围岩相互作用关系,对于支架选型、有效控制顶板变形、保证采掘交替高效生产,具有十分重要的理论和实践意义。 本文以潞安集团王庄煤矿7103综掘工作面为实际工程背景,分别从采区地质条件、超前支架结构以及合理支护强度、煤壁冒顶片帮机理,通过现场收集资料、理论分析、数值模拟、井下工业性试验等方法,对综掘巷道超前支架与围岩相互作用进行了深入的研究。 首先,根据王庄矿7103综掘工作面地质力学参数,通过对比多种不同的计算推导,确立了符合7103综掘工作面合理的支护强度,为工作面安全生产提供保障。同时展开了应用新型超前支护装置下施工工艺的分析,为采掘交替的正规循环提供了依据。 其次,从理论上结合广义Mises准则,在考虑中主应力的情况下,确立了煤壁塑性区宽度计算公式。通过数值模拟,展开了巷道尺寸变化对围岩稳定性影响的研究、展开了ZJC2×1040/30/42超前支架在7103综掘工作面的适应性研究、展开了在不同围岩条件下超前支架的适应性研究、展开了综掘巷道应用锚杆锚索的数值模拟研究。 最后,在王庄矿6183运巷和7103运巷2个综掘工作面开展井下工业性试验。试验表明：ZJC2×1040/30/42超前支架具有可靠性高、结构简单、支撑力强、覆盖面积广、操作简单、针对不同地质条件适应能力强等特点。在整个工业性试验期间,该超前支护装置与综掘面其它设备之间配套合理,采掘正规循环率高,超过原综掘10%以上。在应用该超前支护的工作面安全环境得到了极大改善,工人在有保护的顶板条件下工作,不仅增强了工人的安全感,同时也提高了工作效率,整个实验期间内安全事故为零。
[Abstract]:At present, the roof fall in the driving process of the fully mechanized roadway in our country, the accident of sheet side often occurs, especially in the construction process of the end of the heading face, the frequency is very high, which has been puzzling the life safety of the coal workers and the normal production of the coal enterprise for a long time. It is of great theoretical and practical significance to study the interaction between support and surrounding rock in fully mechanized roadway. It is of great theoretical and practical significance for the selection of support, the effective control of roof deformation and the guarantee of alternate and efficient production of mining and excavation. Taking the 7103 fully mechanized excavation face of Wangzhuang Coal Mine of Lu'an Group as the actual engineering background, this paper analyzes the geological conditions of the mining area, the structure of the leading support, the reasonable supporting strength, the mechanism of roof fall of coal wall, and the data collected on the spot. Numerical simulation and underground industrial test are used to study the interaction between advance support and surrounding rock in fully mechanized roadway. Firstly, according to the geological and mechanical parameters of No. 7103 fully mechanized excavation face in Wangzhuang Mine, the reasonable supporting strength of 7103 fully mechanized working face is established by comparing various calculation and derivation, which provides guarantee for safe production of working face. At the same time, the analysis of the construction technology under the application of the new advanced support device is carried out, which provides the basis for the regular cycle of mining and excavation alternations. Secondly, the formula for calculating the width of plastic zone of coal wall is established by combining with the generalized Mises criterion and taking into account the medium principal stress. Through numerical simulation, the influence of tunnel size change on the stability of surrounding rock is studied, the adaptability of ZJC2 脳 1040-30-42 leading support in 7103 fully mechanized excavation face is studied, and the adaptability of advance support under different surrounding rock conditions is studied. The numerical simulation of anchor cable used in fully mechanized roadway is carried out. Finally, the underground industrial test was carried out in two fully mechanized driving faces of Wangzhuang Mine, 6183 roadway and 7103 roadway. The test results show that: ZJ _ 2 脳 1040-30-42 advanced support has the characteristics of high reliability, simple structure, strong support, wide coverage, simple operation and strong adaptability to different geological conditions. During the whole industrial test period, the supporting device is reasonable with other equipment for fully mechanized excavation, and the normal circulation rate of mining is high, which is more than 10% higher than that of the original fully mechanized excavation. The safety environment of the working face with advanced support has been greatly improved. The workers working under the protected roof condition not only enhance the sense of security of the workers, but also improve the working efficiency. The safety accident is zero during the whole experiment period.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
本文编号：2231038
[Abstract]:At present, the roof fall in the driving process of the fully mechanized roadway in our country, the accident of sheet side often occurs, especially in the construction process of the end of the heading face, the frequency is very high, which has been puzzling the life safety of the coal workers and the normal production of the coal enterprise for a long time. It is of great theoretical and practical significance to study the interaction between support and surrounding rock in fully mechanized roadway. It is of great theoretical and practical significance for the selection of support, the effective control of roof deformation and the guarantee of alternate and efficient production of mining and excavation. Taking the 7103 fully mechanized excavation face of Wangzhuang Coal Mine of Lu'an Group as the actual engineering background, this paper analyzes the geological conditions of the mining area, the structure of the leading support, the reasonable supporting strength, the mechanism of roof fall of coal wall, and the data collected on the spot. Numerical simulation and underground industrial test are used to study the interaction between advance support and surrounding rock in fully mechanized roadway. Firstly, according to the geological and mechanical parameters of No. 7103 fully mechanized excavation face in Wangzhuang Mine, the reasonable supporting strength of 7103 fully mechanized working face is established by comparing various calculation and derivation, which provides guarantee for safe production of working face. At the same time, the analysis of the construction technology under the application of the new advanced support device is carried out, which provides the basis for the regular cycle of mining and excavation alternations. Secondly, the formula for calculating the width of plastic zone of coal wall is established by combining with the generalized Mises criterion and taking into account the medium principal stress. Through numerical simulation, the influence of tunnel size change on the stability of surrounding rock is studied, the adaptability of ZJC2 脳 1040-30-42 leading support in 7103 fully mechanized excavation face is studied, and the adaptability of advance support under different surrounding rock conditions is studied. The numerical simulation of anchor cable used in fully mechanized roadway is carried out. Finally, the underground industrial test was carried out in two fully mechanized driving faces of Wangzhuang Mine, 6183 roadway and 7103 roadway. The test results show that: ZJ _ 2 脳 1040-30-42 advanced support has the characteristics of high reliability, simple structure, strong support, wide coverage, simple operation and strong adaptability to different geological conditions. During the whole industrial test period, the supporting device is reasonable with other equipment for fully mechanized excavation, and the normal circulation rate of mining is high, which is more than 10% higher than that of the original fully mechanized excavation. The safety environment of the working face with advanced support has been greatly improved. The workers working under the protected roof condition not only enhance the sense of security of the workers, but also improve the working efficiency. The safety accident is zero during the whole experiment period.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
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