焦作矿区底板注浆加固工作面富水性分区及加固效果分析

Analysis of Watery Partition and Reinforcement Effect for Reinforcing Mining Face with Floor Grunting in Jiaozuo Coal Area

以焦作矿区8个发生突水的底板注浆加固工作面为背景,依据底板钻孔涌水量对工作面进行了富水性分区,研究了工作面底板注浆加固体的空间分布特征,分析了底板突水的机理。研究结果表明:底板突水主要发生在富水区,并受断层带、基本顶来压等多个因素影响。注浆加固有效地降低了大水工作面的突水危险,表明对工作面的富水区、断层带、基本顶来压等特殊位置加大注浆工程量是十分必要的。

On the basis of water inflow of floor boreholes in 8 reinforcing mining faces with floor grunting against water-burst, space distribution characteristics of reinforcement body by floor grunting were researched and floor water-burst mechanism was ana- lyzed. Results showed that floor water-burst occurred mainly in watery area and was influenced by faults, basic roof weighting. Grunting reinforcement could effectively reduce water-burst danger of mining face threatened by water, which showed that it was very necessary that adding grunting amount in watery area, fault zone and places of basic roof weighting.