综采回采巷道矿压显现规律及围岩稳定性研究

发布时间：2018-03-25 20:40

本文选题：回采巷道　切入点：矿山压力　出处：《内蒙古科技大学》2015年硕士论文

【摘要】：随着煤矿开采深度的逐年增加，造成影响巷道破坏的因素也随之增多，要想保证巷道的安全与稳定，就离不开对矿山压力的研究，因此，开展矿山压力与围岩稳定性关系的研究有着重要的工程意义。论文以寸草塔一矿5-1煤层回采巷道为研究背景，根据煤矿地质报告、煤层赋存条件、钻孔柱状图等地质资料，运用顶板离层仪、锚杆测力计、顶板动态仪等观测仪器现场实测，并通过数值模拟的方法,全面分析了寸草塔一矿5-1煤层回采巷道的矿压显现规律,为回采巷道提供了最优合理支护方案,研究的内容主要有: (1)在通过钻孔资料分析了寸草塔一矿5-1煤层顶板岩层结构的基础上,经实验室设备测定了寸草塔一矿5-1煤层及顶底板岩层的物理力学参数，，确定了寸草塔一矿5-1煤层顶底板岩石的力学性质，为以后的数值模拟提供可靠的力学参数依据。 (2)在总结以往研究成果的基础上,根据所选取的7个指标因素，采用模糊分类的数学理论的多因素综合评判方法,预测巷道围岩稳定性类别，得出寸草塔一矿5-1煤层回采巷道围岩稳定性类别为第Ⅲ类，巷道围岩类型属于中等稳定的类型，结合国家行业标准给出了合理的支护形式。 (3)通过对寸草塔一矿5-1煤层回采巷道原有支护方案进行监测,得出单一的锚杆支护并不能保证寸草塔一矿5-1煤层回采巷道的稳定与安全，必须增加锚索作为补强支护；对原有支护方案进行改进和优化，通过运用FLAC3D软件进行数值模拟，确定出最优的支护方案。 (4)通过锚杆测力计和顶板动态仪对最优支护方案进行现场实测,分析了寸草塔一矿5-1煤层回采巷道矿压显现规律特点,掌握了回采巷道围岩变形的基本特征；最优方案的应用取得了满意的支护效果。论文针对寸草塔一矿5-1煤层，对5-1煤层回采巷道矿压显现规律和回采巷道围岩控制技术进行了有益的探索,解决了寸草塔一矿5-1煤层回采巷道中存在的实际问题，积累了宝贵经验，在安全生产中，具有重要的意义；论文的研究也为今后解决类似煤层煤矿的设计、开采、安全生产、管理和决策提供了参考。
[Abstract]:With the increase of mining depth year by year, the factors that affect roadway damage are also increasing. In order to ensure the safety and stability of roadway, it is necessary to study mine pressure. It is of great engineering significance to study the relationship between mine pressure and surrounding rock stability. Based on the mining roadway of coal seam 5-1 in Cuncaota No. 1 Mine, according to the geological data of coal mine geological report, coal seam occurrence condition, borehole histogram and so on, the paper uses roof dissociator, anchor dynamometer, etc. On the spot measured by roof dynamometer and other observation instruments, and through the method of numerical simulation, the rock pressure behavior of coal seam 5-1 coal seam in Cuncaota No. 1 Coal Mine is comprehensively analyzed, which provides the optimum and reasonable support scheme for the mining roadway. The main contents of the study are as follows:. On the basis of analyzing the roof structure of coal seam 5-1 in Cuncaota-1 Coal Mine by drilling data, the physical and mechanical parameters of 5-1 coal seam and roof and floor strata of Cuncaota-1 Coal Mine were measured by laboratory equipment. The mechanical properties of the roof and floor rock of coal seam 5-1 in Cuncaota No. 1 Coal Mine are determined, which provides a reliable basis for the numerical simulation in the future. 2) on the basis of summing up the previous research results, according to the selected seven index factors, the multi-factor comprehensive evaluation method of fuzzy classification mathematical theory is used to predict the stability of roadway surrounding rock. It is concluded that the stability of surrounding rock of mining roadway in Cuncaota No. 1 coal seam is the third type, and the surrounding rock type of roadway belongs to medium stable type, and the reasonable supporting form is given in combination with the national industry standard. Through monitoring the original support scheme of coal seam 5-1 coal seam in Cuncaota No. 1 Coal Mine, it is concluded that single bolting support can not guarantee the stability and safety of coal seam 5-1 coal seam mining roadway in Cuncaota No. 1 Coal Mine, and the bolting cable must be added as reinforcement support. The original support scheme is improved and optimized, and the optimal support scheme is determined by numerical simulation with FLAC3D software. (4) through bolting dynamometer and roof dynamometer, the field measurement of the optimal support scheme is carried out, and the characteristics of rock pressure behavior of mining roadway in Cuncaota-1 coal seam 5-1 are analyzed, and the basic characteristics of surrounding rock deformation of mining roadway are grasped. The application of the optimal scheme has achieved satisfactory support effect. Aiming at coal seam 5-1 of Cuncaota No. 1 Coal Mine, the paper makes a beneficial exploration on the law of mine pressure behavior and the surrounding rock control technology of mining roadway in coal seam 5-1, and solves the practical problems existing in the roadway of coal seam 5-1 in Cuncaota No. 1 Coal Mine. It has accumulated valuable experience and is of great significance in safe production, and the research in this paper also provides a reference for the design, mining, safety production, management and decision making of similar coal seam coal mines in the future.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4

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