豫西偃龙矿区巷道滞后突水机理及防治方法

Roadway Delayed Water Bursting Mechanism and Control Method in Yanlong Mining Area,Western Henan

偃龙矿区地处豫西,主要开采二叠系下统山西组二1煤层。在开采过程中,受到下伏太原组和马家组灰岩岩溶裂隙水的威胁,底板岩巷掘进后易发生滞后突水,对矿井的安全生产造成很大影响。在阐述了巷道滞后突水机理的基础上,分析了突水原因,提出了防治方法,并以-236m大巷滞后突水为例,论述突水的形成与治理过程。分析表明,-236m大巷滞后突水的水源为太原组和马家组灰岩岩溶裂隙水,导水通道为F215断层及附近裂隙带。随后在巷道北侧水仓内设置钻场,布置钻孔进行注浆堵漏。同时对钻孔的设计、调整及注浆过程进行了较为详细的介绍。从注浆效果可以看出,出水点水量由原来近110m3/h降至2m3/h,堵水率达到98%,封堵效果很好。

The Yanlong mining area is situated in western Henan,mainly mining the II1 coal seam in the lower Permian Shanxi Formation.The mining is threatened by underlying limestone karst fissure water in the Taiyuan and Majiagou formations,after floor hard heading advancing is prone to delayed water bursting,and awfully impacts mine safety in production.Based on roadway delayed water bursting mechanism expounding,analyzed water bursting causation,put forward control method,to take the delayed water bursting in-236m main roadway as an example,discussed water bursting forming and governing process.The analysis has demonstrated that: the-236m main roadway delayed water bursting sources are from Taiyuan and Majiagou formations limestone karst fissure water aquifers,water conducted channels have fault F215 and near by fissure zones.Soon afterwards,set drilling site in a sump on the north side of the roadway,and grouting to block up.The paper introduced drill holes design,modulating and grouting process in detail,from the grouting effect can see,water inflow from intakes is from original about 110m3/h dropped to 2m3/h,blocking rate 98%,thus good effect.