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《Coal Geology of China》 2011-06
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Application of Square Grid Well Pattern Grouting Design in Floor Transformation

Wang Weidong1,2,Ying Yage3(1.School of Mines,CUMT,Xuzhou,Jiangsu 221116;2.Production Department,Yongjin Energy Co.Ltd,,Yongcheng Coal Group,Yuzhou,Henan 461683;3.Xinjiang Qiuci Mining Co.Ltd.,Kuqa,Xinjiang 842000)  
To extract coal from working face under floor confined water threat safely,water control method of grouting transformation could be adopted,while the design is the basis and premise.Since the traditional design method is labored and inefficiency,thus design principle and basis thoughts of square grid well pattern were introduced.Taking the No.2207 working face in N2 winning district,Xinqiao coalmine as an example,design square grid well pattern based on working face size and hydrogeological condition,input basic parameters,confirm borehole parameters needed,according to geophysical data and actually revealed floor limestone karstic fracture development,detail borehole number and position adjustment in due course.The application effect demonstrated that the method has characteristics of easy design,even borehole collocation,prominent emphases,design dead zone elimination,good effect of floor grouting transformation,thus an easy operation,safe and high efficiency grouting design method.
【CateGory Index】: TD745
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