裂隙岩层条件下大采高工作面矿压实测及显现规律研究

发布时间：2018-09-01 17:24

【摘要】：面对能源使用的日益紧张，如何将煤炭资源进行更加安全高产、节能提效的开采成为了未来煤炭产业发展的方向。当前，一次采全高的大采高综采技术应用广泛，采用大型液压支架控制围岩及顶板，大功率采煤机和大型刮板输送机割煤、运煤。加快了数字化采煤的进程，推动了煤炭产业的可持续发展。本课题以山西长治三元中能煤业一次采全高综采工作面为工程背景，通过实验测评、理论计算、现场实测及数值模拟等科技手段和方法，对三元中能煤业3#煤层顶板岩层裂隙发育程度、各岩层厚度及力学参数等进行细致的研究，通过现场窥视与力学特性分析，全面进行了矿压实测与数据分析。结合重新分层后的岩层，利用各岩层载荷公式及经对比后较为简便的“梁”理论公式，研究计算了矿压显现规律的有关参数，并采用FLAC3D数值模拟对显现规律、来压特征等内容进行了详细的分析。其中，对顶板岩层进行重新分层时，使用的仪器为TYGD10型岩层钻孔窥视仪。现场实测的数据包括：工作面来压情况、工作阻力随工作面推进距离变化关系、初撑力、煤壁片帮、安全阀开启频率、活柱下缩量、煤柱片帮统计、回采巷道超前支承压力、巷道表面位移量等。通过四个方面的结合研究，分析了3#煤顶板裂隙的发育程度，掌握了2301大采高综采工作面的直接顶初次垮落步距、老顶初次、周期来压步距、支架初撑力及工作阻力、活柱下缩量、安全阀开启频率、煤壁受围岩扰动的片帮程度及防护措施、巷道表面位移变形规律及工作面超前支承压力影响范围等。通过全面系统的分析，对中能煤业大采高工作面的矿压显现规律有了准确的认识，为三元中能煤业后续工作面的接替及安全有效的运行提供了数据支持，为大采高综采技术在长治矿区的应用起到了推动作用。
[Abstract]:In the face of the increasing tension of energy use, how to make coal resources more safe and high yield, energy saving and efficient mining has become the direction of the future development of coal industry. At present, the full-height fully mechanized mining technology is widely used. Large hydraulic support is used to control surrounding rock and roof, high power shearer and large scraper conveyor to cut coal and transport coal. Speed up the process of digital coal mining, promote the sustainable development of the coal industry. In this paper, based on the engineering background of Shanxi Changzhi San-yuan Zhongeng Coal Mining face, scientific and technical means and methods such as experimental evaluation, theoretical calculation, field measurement and numerical simulation are adopted. This paper makes a detailed study on the degree of crack development, thickness and mechanical parameters of the roof strata in the coal seam of Sanyanzhong Coal Industry. Through field observation and analysis of the mechanical characteristics, the rock pressure measurement and data analysis are carried out in an all-round way. Combined with the strata after stratification, using the load formula of each stratum and the relatively simple "beam" theory formula after comparison, the related parameters of the rock pressure appearance law are studied and calculated, and the FLAC3D numerical simulation is used to simulate the appearing law. Pressure characteristics and other contents were analyzed in detail. When the roof strata are re-stratified, the TYGD10 type borehole peeping instrument is used. The field measured data include: working pressure situation, working resistance changing with the working face advance distance, initial support force, coal wall cover, safety valve opening frequency, living pillar shrinkage, coal pillar slab statistics, mining roadway leading support pressure, Surface displacement of roadway, etc. Through the combined study of four aspects, this paper analyzes the development degree of coal roof crack, and grasps the first collapse distance of the direct roof, the first time of the old roof, the interval of the periodic pressure step, the initial support force and the working resistance of the 2301 fully mechanized mining face. Working column shrinkage, safety valve opening frequency, coal wall by surrounding rock disturbance and protection measures, roadway surface displacement and deformation law and working face ahead support pressure influence range, and so on. Through the comprehensive and systematic analysis, the paper gives an accurate understanding of the regularity of mine pressure appearance in Zhongeng coal mining face, which provides data support for the succession and safe and effective operation of Sanzhong coal industry follow-up working face. It has played an important role in promoting the application of fully mechanized mining technology of large mining height in Changzhi mining area.
【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】：TD326

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