孤岛工作面矿压显现规律及超前支护技术研究
发布时间：2018-11-13 15:42
【摘要】：孤岛工作面的开采有利于使我国煤炭资源的采出率大大增加,但因为孤岛工作面的特殊地质条件和结构,使得孤岛工作面的矿压显现规律以及围岩破坏与普通工作面有很大的差别,其中孤岛工作面超前巷道支护以及顶板控制的问题一直是困扰孤岛工作面安全、快速回采的难题。本文以孙疃煤矿1026孤岛工作面为工程背景,采用数值模拟、理论分析、现场实测等综合性研究方法,研究了1026孤岛工作面的矿压显现规律和超前巷道的支护技术。通过理论分析研究了巷道两帮移近的相关因素以及弧形三角块力学模型的参数；得到三角块的三个参数的具体值分别为11m、13.2m和2.6m。通过数值模拟,分析了孤岛工作面的应力场与位移场及塑性区范围,超前压力影响范围在80～100m之间；通过现场实测,得出工作面周期来压步距为9.7m,动载系数为1.735,采动剧烈影响区为距煤壁43.8m范围内；在获得孤岛工作面矿压规律的基础上,给出了孤岛工作面超前巷道围岩控制技术的建议；同时对比分析了孤岛工作面回采巷道在原有的支护技术下以及改进后的支护技术下的围岩变形。
[Abstract]:The mining of Gudao face is beneficial to increase the mining rate of coal resources in our country, but because of the special geological conditions and structure of Gudao face, It makes the rock pressure law and surrounding rock damage of the isolated island face very different from that of the common working face. The problems of advance roadway support and roof control in the isolated island face are always a difficult problem that puzzles the safe and fast mining of the isolated island face. Based on the engineering background of 1026 Gudao face in Suntuan Coal Mine, this paper studies the regularity of rock pressure behavior and the supporting technology of advance roadway in 1026 Gudao face by using comprehensive research methods such as numerical simulation, theoretical analysis and field measurement. Through the theoretical analysis, the related factors of the two sides of roadway and the parameters of the mechanical model of the arc triangle block are studied, and the specific values of the three parameters of the triangle block are 11 m ~ (13) m and 2.6 m respectively. Through numerical simulation, the stress field, displacement field and plastic zone range of the island face are analyzed, and the influence range of the leading pressure is between 80m and 100m. Through the field measurement, it is concluded that the interval of periodic pressure is 9.7 m, the coefficient of dynamic load is 1.735, and the mining area is within 43.8 m from the coal wall. On the basis of obtaining the law of mine pressure in the Gudao face, the suggestion of controlling the surrounding rock of the advance roadway in the Gudao face is given. At the same time, the surrounding rock deformation of the mining roadway in the isolated island face under the original support technology and the improved support technology is compared and analyzed.
【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】：TD323
本文编号：2329584
[Abstract]:The mining of Gudao face is beneficial to increase the mining rate of coal resources in our country, but because of the special geological conditions and structure of Gudao face, It makes the rock pressure law and surrounding rock damage of the isolated island face very different from that of the common working face. The problems of advance roadway support and roof control in the isolated island face are always a difficult problem that puzzles the safe and fast mining of the isolated island face. Based on the engineering background of 1026 Gudao face in Suntuan Coal Mine, this paper studies the regularity of rock pressure behavior and the supporting technology of advance roadway in 1026 Gudao face by using comprehensive research methods such as numerical simulation, theoretical analysis and field measurement. Through the theoretical analysis, the related factors of the two sides of roadway and the parameters of the mechanical model of the arc triangle block are studied, and the specific values of the three parameters of the triangle block are 11 m ~ (13) m and 2.6 m respectively. Through numerical simulation, the stress field, displacement field and plastic zone range of the island face are analyzed, and the influence range of the leading pressure is between 80m and 100m. Through the field measurement, it is concluded that the interval of periodic pressure is 9.7 m, the coefficient of dynamic load is 1.735, and the mining area is within 43.8 m from the coal wall. On the basis of obtaining the law of mine pressure in the Gudao face, the suggestion of controlling the surrounding rock of the advance roadway in the Gudao face is given. At the same time, the surrounding rock deformation of the mining roadway in the isolated island face under the original support technology and the improved support technology is compared and analyzed.
【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】：TD323
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