Tangshan Research Institute, China Coal Technology and Engineering Group

为减少新建井筒的压煤量,挖掘矿井生产潜力,以平煤四矿新建进风井、回风井为实例,采用现场试验、数值模拟计算、理论研究等方法,系统研究了新建井筒抗变形技术,建立起以小保护煤柱为条件的新建井筒抗变形技术体系,包括整体规划、柔性措施和刚性措施,刚柔结合用于吸收和抵抗岩层的移动与变形。实践证明,新建井筒在小煤柱保护条件下采用抗变形技术措施后,井筒附近地表最大下沉值为249 mm,井筒没有出现破坏,能正常安全使用,解放井筒压煤量1 515.3万t。

In order to effectively reduce the coal quantity under the new mine shaft and to excavate the mine production potential, based on the new mine ventilatio n shaft and new mine air retuning shaft of No.4 Mine in Pingdingshan Tian'an Coal Mining Company Limited as the cases, the site experiment, numerical simulation calc ulation, theoretical study and other methods were applied to systematicly study on the anti-deformation technology of the new mine shaft and to establish the anti-defor mation technical system of the new mine shaft under the small protective coal pillar condition, including the completed planning, flexibility measures and rigid measure s.The rigid and flxibility combination would be applied to absorb and resist the movement and deformation of the rock strata.The practices showed that after the anti-d eformation technical measures conducted, the new mine shaft under the small coal pillar protection condition would have a max surface ground subsidence value of 24 9 mm near the mine shaft. There was no any failure occurred on the mine shaft, the mine shaft is in a normal safe operation and there was 15. 15 million t of coal liberat ed under the mine shaft.

国家自然科学基金资助项目(51074089)；