煤矿井下非电力组合泵站局部注浆防灭火技术研究

Fire prevention and extinguishing local grouting technology research of non-power combined pumping station in underground coal mine

为防治煤矿井下煤炭自燃,在分析气动隔膜泵与水射流泵工作特性的基础上,提出了非电力组合泵站局部注浆防灭火技术,根据现场使用要求确定了局部注浆用泵的选型与组合方式,计算了组合泵站最大输浆距离,给出了组合泵站注浆系统配置与工艺流程,并建立了组合泵间最短连接管路长度的计算模型。研究结果表明:由气动隔膜泵与水射流泵构建的非电力组合泵站,仍可保持简单、轻便、安全的特点,可同时解决煤矿井下非电力局部注浆的自动制浆、连续注浆以及长距离输浆并保持出口压力等问题,在管径50 mm配置下最大输浆距离可达189 m,约为气动隔膜泵输浆距离的1.6倍,适合井下非电力长距离局部注浆防治煤炭自燃的区域。

In order to prevent coal spontaneous combustion in underground coal mine,based on analysis of work characteristics of pneumatic diaphragm pump and water jet pump,the non-power combined pumping station for fire prevention and extinguishing local grouting technology were put forward.According to the requirements,combination mode and type of the local grouting pumps were identified. The maximum transmission distance of combination pump was calculated,technical process and grouting system configuration of combined pumping station were given. The calculation model of shortest length pipe for connecting combined pumps was established. The research results showed non-power combined pumping station which was constructed by pneumatic diaphragm pump and water jet pump,could maintain the characteristics of briefness,portability,safety.Meanwhile,the non-power combined pumping station could solve difficult problems,such as automatic and continuous pulping,long distance slurry conveying,maintaining outlet pressure. The maximum transmission distance of slurry conveying could reach 189 m of pipe diameter 50 mm which was about 1.6 times of pneumatic diaphragm pump.The non-power long distance local grouting technology was suitable to prevent coal spontaneous combustion area in underground coal mine.