阳煤集团五矿8407工作面护巷煤柱适应性研究
发布时间：2018-10-17 17:13
【摘要】：近几年来，随着我国经济建设的高速发展，作为煤炭生产和消耗大国，煤炭资源越来越少，面临枯竭的趋势,这就要求我们在煤炭开采期间必须竭尽全力地做到避免煤炭资源不必要的浪费。针对这种情况，国内外许多研究学者就沿空巷道留煤柱护巷技术展开了大量的研究，并取得了重要的成果。通过研究发现合理的煤柱尺寸不仅能够节约煤炭资源，而且还对回采巷道围岩控制及采场安全回采起到积极作用和效果。特别是对高瓦斯矿井而言，合理的护巷煤柱尺寸不仅要减小煤柱尺寸避免资源的浪费，同时还要防止采空区一侧的有害气体通过煤柱的裂缝进入回采空间对工作面安全开采带来威胁。所以针对高瓦斯矿井沿空巷道护巷煤柱留设是否合理的问题也是现下还需进一步研究解决的问题之一。 通过对先前众多学者研究成果的学习和借鉴，本文以阳煤集团五矿高瓦斯矿井8407工作面沿空巷道护巷煤柱适应性进行研究。首先是运用理论研究分析8407工作面回风巷道护巷煤柱上覆岩层运动破坏的特征及其对煤柱产生的影响，并对沿空护巷煤柱内部应力分布以及变形破坏机理进行分析，，建立了沿空巷道护巷煤柱力学计算模型，推导出煤柱的合理留设宽度的计算公式来验证8407工作面沿空护巷煤柱是否达到回采要求，并根据注浆加固后的煤柱强度重新计算优化煤柱的合理宽度。接着辅以相似材料模拟实验来还原采场实际情况，根据观察采场开挖过程中煤柱及巷道矿压显现特征来初步预测煤柱及巷道围岩变形规律。然后运用数值模拟对煤柱注浆加固前后的应力、位移大小和状态进行分析，并对煤柱在注浆加固后能否继续优化尺寸进行初步的探讨。最后根据现场工业性试验来监测实际工作面支承压力分布、巷道及煤柱应力和位移等矿压规律及显现特征对比煤柱注浆加固前后的效果，并以此来论证先前运用各种方法手段的正确性。本文所研究的成果为今后阳煤矿区煤柱的支护及尺寸优化提供一些有价值的参考和实践经验。
[Abstract]:In recent years, with the rapid development of China's economic construction, as a large country of coal production and consumption, coal resources are becoming less and less, facing the trend of depletion. This requires that we must do our utmost to avoid unnecessary waste of coal resources during coal mining. In view of this situation, many scholars at home and abroad have carried out a great deal of research on the technology of retaining coal pillar to protect roadway along the goaf, and obtained important results. It is found that reasonable coal pillar size can not only save coal resources, but also play a positive role and effect on the control of surrounding rock of mining roadway and safe mining of stope. Especially for high gas mine, reasonable coal pillar size should not only reduce the coal pillar size to avoid the waste of resources, At the same time, it is necessary to prevent harmful gas from the side of goaf from entering the mining space through the crack of coal pillar. Therefore, it is one of the problems that need to be solved further in order to solve the problem of whether it is reasonable to keep coal pillar in roadway along goaf in high gas mine. Through the study and reference of many previous scholars' research results, this paper studies the adaptability of coal pillar protection along goaf roadway in 8407 face of high gas mine in No. 5 Coal Mine of Yangmei Coal Group. Firstly, the characteristics of movement failure of overburden strata on coal pillar in 8407 face return air roadway and its influence on coal pillar are analyzed, and the stress distribution and deformation failure mechanism of coal pillar along goaf roadway are analyzed. The mechanical calculation model of coal pillar in goaf roadway is established, and the formula of reasonable retaining width of coal pillar is deduced to verify whether the pillar along goaf roadway of 8407 face meets the requirement of mining. The reasonable width of coal pillar is optimized according to the strength of coal pillar strengthened by grouting. Then the simulation experiment of similar materials is used to reduce the actual situation of stope and the deformation law of coal pillar and surrounding rock of roadway is preliminarily predicted according to observing the characteristics of coal pillar and rock pressure in roadway during the excavation of stope. Then the stress, displacement and state of coal pillar before and after grouting reinforcement are analyzed by numerical simulation, and whether the coal pillar can continue to optimize the size after grouting reinforcement is discussed preliminarily. Finally, according to the field industrial test to monitor the actual working face bearing pressure distribution, roadway and pillar stress and displacement and other characteristics of rock pressure, compared with the effect of coal pillar grouting before and after reinforcement. And in order to demonstrate the correctness of the previous use of various methods and means. The results of this paper provide some valuable reference and practical experience for the support and size optimization of coal pillar in Yang-coal mine area in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
本文编号：2277385
[Abstract]:In recent years, with the rapid development of China's economic construction, as a large country of coal production and consumption, coal resources are becoming less and less, facing the trend of depletion. This requires that we must do our utmost to avoid unnecessary waste of coal resources during coal mining. In view of this situation, many scholars at home and abroad have carried out a great deal of research on the technology of retaining coal pillar to protect roadway along the goaf, and obtained important results. It is found that reasonable coal pillar size can not only save coal resources, but also play a positive role and effect on the control of surrounding rock of mining roadway and safe mining of stope. Especially for high gas mine, reasonable coal pillar size should not only reduce the coal pillar size to avoid the waste of resources, At the same time, it is necessary to prevent harmful gas from the side of goaf from entering the mining space through the crack of coal pillar. Therefore, it is one of the problems that need to be solved further in order to solve the problem of whether it is reasonable to keep coal pillar in roadway along goaf in high gas mine. Through the study and reference of many previous scholars' research results, this paper studies the adaptability of coal pillar protection along goaf roadway in 8407 face of high gas mine in No. 5 Coal Mine of Yangmei Coal Group. Firstly, the characteristics of movement failure of overburden strata on coal pillar in 8407 face return air roadway and its influence on coal pillar are analyzed, and the stress distribution and deformation failure mechanism of coal pillar along goaf roadway are analyzed. The mechanical calculation model of coal pillar in goaf roadway is established, and the formula of reasonable retaining width of coal pillar is deduced to verify whether the pillar along goaf roadway of 8407 face meets the requirement of mining. The reasonable width of coal pillar is optimized according to the strength of coal pillar strengthened by grouting. Then the simulation experiment of similar materials is used to reduce the actual situation of stope and the deformation law of coal pillar and surrounding rock of roadway is preliminarily predicted according to observing the characteristics of coal pillar and rock pressure in roadway during the excavation of stope. Then the stress, displacement and state of coal pillar before and after grouting reinforcement are analyzed by numerical simulation, and whether the coal pillar can continue to optimize the size after grouting reinforcement is discussed preliminarily. Finally, according to the field industrial test to monitor the actual working face bearing pressure distribution, roadway and pillar stress and displacement and other characteristics of rock pressure, compared with the effect of coal pillar grouting before and after reinforcement. And in order to demonstrate the correctness of the previous use of various methods and means. The results of this paper provide some valuable reference and practical experience for the support and size optimization of coal pillar in Yang-coal mine area in the future.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
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