马营煤矿复采工作面过老空巷矿压显现特征及关键技术研究

发布时间：2018-06-27 18:35

本文选题：复采 + 过空巷　；参考：《辽宁工程技术大学》2015年硕士论文

【摘要】：我国在煤炭资源的整合与重组过程中,将许多粗放型开采的小煤窑划归入大型矿井中,如何将原来小煤窑占有的大量优质煤炭资源重新回采利用,是急需解决的问题。与初次开采相比,复采工作面顶板及煤体破碎情况严重,顶板及空巷支护困难,综放工作面要通过其内部冒落高度较大的空巷,如果不采取有效工作面支护及加固空巷的技术措施,预计工作面过空巷时将极为困难,安全生产没有保障,甚至不能通过。针对马营煤矿复采区复杂的地质条件,尤其是顶板破碎、工作面内存在大量老空巷的情况,以4101工作面为主要研究对象,通过工作面过空巷阶段顶板断裂过程及受力情况,分析上覆岩体关键结构对矿压显现的影响。通过FLAC3D模拟软件分析了过空巷阶段工作面及空巷矿压显现规律。模拟结果表明,工作面距离空巷超过30 m时,空巷受采动影响很小,当距离空巷10 m时,超前支承压力与空巷围岩影响范围重合交叉,当工作面继续推进时,压力峰值越过空巷,老顶断裂位置在空巷前方。由复采区地质及煤体特征可知,工作面布置及支护困难,因此针对工作面过空巷阶段提出了管理顶板及过空巷时需要采取的技术措施及要求,在掘进及回采过程中应严格按施工要求进行支护。在采取相应措施后进行了过空巷阶段的矿压及顶底板移近量的监测验证实施效果,表明研究对工作面过空巷具有一定的指导作用。
[Abstract]:In the process of integration and reorganization of coal resources, many small coal kilns of extensive mining are classified into large mines in our country. It is urgent to solve the problem of how to reuse a large number of high quality coal resources that were originally occupied by small coal kilns. Compared with the initial mining, the roof and coal body of the compound mining face are broken seriously, and it is difficult to support the roof and the empty roadway. If we do not take effective technical measures to support and reinforce the goaf roadway, it is expected that it will be extremely difficult to cross the goaf roadway, and the safety production will not be guaranteed or even passed. In view of the complex geological conditions in the mining area of Maying coal mine, especially the roof breakage and the existence of a large number of old goaf roadways in the working face, taking 4101 face as the main research object, the process of roof fracture and the stress on the roof at the stage of working face passing through the goaf are studied. The influence of the key structure of overlying rock mass on the rock pressure behavior is analyzed. Through FLAC3D simulation software, the law of mine pressure behavior of working face and goaf in the stage of passing through the gob is analyzed. The simulation results show that when the working face is more than 30 m away from the goaf, the goaf is less affected by the mining movement. When the distance is 10 m, the influence range of the leading supporting pressure and the surrounding rock of the goaf is overlapping, and when the working face continues to advance, The peak pressure is over the goaf and the main roof fracture position is in front of the goaf. According to the geological and coal body characteristics of the mining area, it is difficult to arrange and support the working face. Therefore, the technical measures and requirements for the management of the roof and the goaf are put forward in view of the working face passing through the roadway stage. In the process of excavation and mining, support should be strictly in accordance with the construction requirements. After taking the corresponding measures, the monitoring and verification of the mine pressure and the roof and floor movement are carried out, which indicates that the study has a certain guiding effect on the working face passing through the roadway.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD32

【参考文献】