段王矿煤层注水可注性指标实验与预判

为提高段王煤矿井下的防尘效果,考察8+9~#和15~#两个主采层的煤层注水可行性.采用实地取样和实验测定方法,测定煤样的原有水分、孔隙率、吸水率和坚固性系数等4个指标,据此判定2个煤层均符合可注水条件.为预判注水效果,实验测定煤的湿润角,得到2个煤层的湿润角均小于90°,表明煤的湿润性好,有利于降尘,注水时无须添加湿润剂.综合考虑煤层裂隙发育程度、煤湿润边角、饱和水分增值、坚固性系数、埋藏深度等因素,运用聚类分析方法,对未来注水综合难易程度做出经验性评估,指出2个煤层均属于比较容易注水煤层的聚类划分类别.根据段王煤矿瓦斯抽采密集钻孔布置实际条件,制定利用瓦斯抽采钻孔的煤层注水工艺方式和工艺参数.

The feasibility experimental study of pumping and shunting pump under pressure in water injection station

At present in the process of water injection station operation, starting and stopping the pump caused system pressure fluctuations, and the fluctuations caused many problems about downstream injection wells. In order to eliminate the fluctuations and reduce problems, taking start pump, connect pump test under pressure in the water injection station installed the rotor frequency control system Changqing oil field developed. During the experiment, by progressively increasing the pressure pump to verify start pump with pressure feasibility test, the result shows when the pressure in the 0-25MPa pressure start and connect pump can be realized, and forecast the maximum pressure of the current start of the station with pressure pump. Start pump with pressure achieve the elimination of pressure fluctuations, provide the prerequisites about realizeing stable water injection pressure, and ultimately realize oil field water injection station to be automatic water injection laid a foundation.