大断面全煤巷道安全快速掘进支护技术研究

发布时间：2018-03-30 20:35

本文选题：大断面　切入点：破碎围岩　出处：《内蒙古科技大学》2015年硕士论文

【摘要】：随着我国现代化矿井不断发展，使得巷道断面尺寸不断加大，大断面巷道的增加更增加了巷道的支护难度。尤其是在当矿井围岩条件处于松软破碎时，大断面巷道支护问题变得更为棘手，冒顶、片帮和底鼓等问题不断地出现，使得煤矿无法进行安全高效的生产，大断面巷道破碎顶板围岩的支护技术的不足已成为当前阻碍煤矿进一步向高产高效发展的屏障。本论文以山西潞安集团潞宁矿区某煤业有限公司5101回风顺槽巷道支护问题为工程背景，在对工程现场充分调研的基础上，针对此矿井生产当中所出现的大断面巷道的支护问题，通过对于矿压，煤岩参数，顶板离层数据等的收集处理采用FLAC3D数值模拟技术对于矿井巷道进行科学系统的分析，提出最佳的优化方案，并结合工业实践对于支护工艺进行改良，以期达到最优的支护效果。通过对5101回风顺槽现场实际观测可知，现有支护虽然基本能够实现对煤巷的支护，但顶板离层偏大，给巷道支护和安全快速掘进带来很大的困扰，在保证巷道整体稳定性的前提下，需要对锚索的布置方式进行调整，进而针对此问题提出2种不同支护方案，通过数值模拟对比各个方案的围岩应力、围岩位移、锚杆及锚索支护结构受力变形、围岩塑性区等变化规律，并结合现场实际情况确定最终支护方案，试验表明锚杆、锚索、锚网的一体化承载对围岩的控制起到很好的效果。本文对某煤业5101回风顺槽支护的优化设计，改良其设计方案，不仅提高5101回风顺槽的掘进速度，还对于实现煤矿安全生产具有重要的现实意义。研究大断面全煤巷道条件下巷道的变形破坏规律及其支护关键技术，既可以对该类大断面全煤巷道条件下巷道支护提供重要的理论与技术参考，也对我国大断面煤巷技术的发展产生实际的应用价值。
[Abstract]:With the continuous development of modern mines in China, the size of roadway section is increasing, and the increase of large-section roadway makes the support of roadway more difficult, especially when the surrounding rock condition of mine is soft and broken. The problem of large section roadway support becomes more intractable. The problems of roof fall, cover and bottom drum appear constantly, which makes the coal mine unable to carry out safe and efficient production. The shortage of supporting technology of broken roof surrounding rock in large section roadway has become a barrier to the further development of high yield and high efficiency in coal mines. In this paper, based on the engineering background of the roadway support problem of 5101 return wind in Luning Coal Industry Co., Ltd, Lu'an Group, Shanxi Lu'an Group, on the basis of full investigation on the site of the project, In view of the support problem of large section roadway in this mine production, through the collection and treatment of mine pressure, coal and rock parameters, roof data and so on, the FLAC3D numerical simulation technology is used to carry on the scientific and systematic analysis to the mine roadway. The best optimization scheme is put forward and the support technology is improved in combination with industrial practice in order to achieve the best support effect. Through the field observation of the 5101 return wind trench, it can be seen that although the existing support can basically realize the coal roadway support, the roof separation layer is on the large side, which brings great troubles to the roadway support and the safe and fast driving. On the premise of guaranteeing the overall stability of roadway, it is necessary to adjust the arrangement of anchor cable, and then to solve this problem, two different support schemes are put forward, and the surrounding rock stress and displacement of each scheme are compared by numerical simulation. The stress deformation and plastic zone of surrounding rock of anchor rod and anchor cable support structure are changed, and the final supporting scheme is determined in combination with the actual situation in the field. The test results show that the integrated bearing capacity of anchor rod, anchor cable and anchor wire mesh plays a good role in the control of surrounding rock. In this paper, the optimized design of the 5101 return air trench support in a coal industry is improved, which not only increases the driving speed of the 5101 return air trench, but also improves the design scheme. It is also of practical significance to realize the safety production of coal mine. The deformation and failure law of roadway under the condition of large section coal roadway and its supporting key technology are studied. It can not only provide important theoretical and technical reference for roadway support under the condition of this kind of large-section coal roadway, but also produce practical application value for the development of large-section coal roadway technology in China.
【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】：TD353

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