内蒙古五间房煤田西二矿XRJ2孔抽水试验成果的影响因素分析——桥式过滤器在抽水试验孔中的应用效果研究

XRJ2 Pumping Test Result Influencing Factor Analysis in West No.2 Coalmine, Wujianfang Coalfield, Inner Mongolia——A Study on Application Effect of Bridge Type Filter in Pumping Test

通过对XRJ1水文兼注浆试验孔、XRJ2注浆检查孔、水源井1号、水源井2号抽水试验资料的分析与研究,认为XRJ2注浆检查孔出水量(相同降深)较XRJ1孔减小了近60%的主要原因是XRJ1钻孔注浆影响所致,与XRJ2孔在抽水试验中使用的桥式骨架过滤器没有关联。针对目前《煤炭资源勘探抽水试验规程》中关于过滤管孔隙率的要求,提出了抽水钻孔过滤管类型与孔隙率选择的思考与建议。

Through pumping test data analysis and study of the XRJ1 hydrogeological and grouting test borehole, XRJ2 grouting inspection borehole, water source wells No.1 and No.2, considered that the main reason of water yield of XRJ2 smaller than XRJ1 about 60% （under same drawdown） is influenced by grouting in XRJ1 and with no relation to bridge type framework filter used in XRJ2 pumping test. In allusion to present ＂Coal Resources Exploration Pumping Test Regulations＂ required filter tube porosity, put forward some considerations and suggestions on selection of pumping test borehole filter tube type and porosity.