深井大断面沿空留巷分阶段底鼓特征分析

发布时间：2018-01-15 09:47

本文关键词：深井大断面沿空留巷分阶段底鼓特征分析　出处：《煤炭科学技术》2016年09期 　论文类型：期刊论文

【摘要】：针对深井大断面沿空留巷底鼓剧烈,防控难度大,以顾桥煤矿1115(1)工作面地质条件为工程背景,利用FLAC~(3D)三维数值模拟软件研究了深井大断面沿空留巷分阶段底鼓特征。研究结果表明:从开掘到报废留巷底鼓严重,掘巷阶段就产生较大的底鼓量,一次采动阶段底板变形继续增大,二次采动阶段底板变形更加剧烈,底鼓量累计超过1 000 mm,其中掘巷、一次采动及二次采动3个阶段的底鼓量分别达到总底鼓量的21%、32%、47%。一次采动影响下工作面前方30 m至工作面后方60m范围内巷道底鼓剧烈,应作为底鼓防治的重点区域。研究成果可为深井大断面沿空留巷底鼓防控提供指导。
[Abstract]:In view of the strong bottom bulging along the gob and the difficulty of prevention and control, the geological conditions of the working face of Guqiao Coal Mine 11151are taken as the engineering background. Three dimensional numerical simulation software was used to study the characteristics of bottom bulging along the goaf of large cross section in deep wells. The results show that the bottom heave is serious from excavation to abandoned retaining roadway. At the stage of roadway excavation, a large amount of floor heave is produced, the deformation of bottom plate in the first mining stage continues to increase, and in the second mining stage, the deformation of the bottom plate is more severe, and the accumulative amount of the bottom drum is more than 1 000 mm, among which the roadway is excavated. The volume of bottom drum in the three stages of primary and secondary mining is up to 21% of the total volume of bottom drum, respectively. 47. Under the influence of single mining, the roadway floor heaving is severe in the range of 30m from the front of the face to 60m behind the working face. The research results can provide guidance for the prevention and control of bottom drum along the large cross section of deep well.
【作者单位】：安徽理工大学煤矿安全高效开采省部共建教育部重点实验室;安徽理工大学能源与安全学院;中国矿业大学矿业工程学院;
【分类号】：TD323
【正文快照】： 0引言我国煤矿开采深度逐年增加,瓦斯涌出量也越来越大,特别是在深部高瓦斯、低透气性煤与瓦斯突出煤层中开采时,大量瓦斯涌出和积聚已成为矿井安全生产和提高开采效率的极大障碍,而采用沿空留巷技术实现Y型通风是解决这一难题的有效途径[1-3]。深部煤岩体处于高地应力、高地

【相似文献】