浅埋近距离煤层回采巷道支护技术研究

发布时间：2018-06-02 13:16

本文选题：近距离煤层 + 煤柱　；参考：《煤炭工程》2017年12期

【摘要】：针对浅埋近距离煤层回采巷道顶板完整性差、支护困难等问题,以内蒙古高家梁煤矿20314辅运巷为工程背景,首先根据煤层间距和巷道位置不同,将20314辅运巷划分为层间距3.2~4m、层间距4m以上和上煤层遗留煤柱下三个不同区域,提出了不同区域巷道的支护技术:巷道上方为采空区时,采用锚(索)网带为基本支护方式,且间隔层小于4m,利用钢梁棚进行二次支护;煤柱下巷道在锚网带支护基础上,加强煤柱侧帮锚杆支护强度。然后,利用FLAC3D对不同支护技术的支护效果模拟验证,并在20314辅运巷进行现场试验。结果表明:巷道服务期间顶板最大下沉量为48mm,两帮最大移近量为93mm,锚杆、锚索受力稳定,无冒顶、片帮事故发生,支护效果较好。
[Abstract]:In view of the problems of poor roof integrity and difficult supporting in the mining roadway of shallow and close distance coal seam, taking 20314 auxiliary roadway of Gaoliang Coal Mine in Inner Mongolia as the engineering background, firstly, according to the difference of coal seam spacing and roadway position, The 20314 auxiliary roadway is divided into 3. 2 m interval, 4 m interval and 3 different areas under the coal pillar left over from the upper coal seam. The supporting technology of the roadway in different areas is put forward: when the roadway is goaf above, the anchor (cable) mesh belt is adopted as the basic supporting mode. And the interval layer is less than 4m, the steel beam shed is used to carry on the secondary support, and the roadway under the coal pillar strengthens the bolting strength of the side of the coal pillar on the basis of bolting and mesh belt support. Then, FLAC3D is used to simulate the support effect of different supporting technology, and field test is carried out in 20314 auxiliary roadway. The results show that the maximum roof subsidence is 48mm and the maximum movement of the two groups is 93mm during the period of roadway service. The anchor rod and anchor cable have stable force and no roof fall. The supporting effect is better.
【作者单位】：山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;
【基金】：国家自然科学基金资助项目(51574154,51474137)
【分类号】：TD353

【相似文献】