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Application of cutting method to double wall ditching blasting in Huangmailing Phosphate Mine;

掏槽法在黄麦岭磷矿掘双壁沟爆破中的应用

The use of cutting method preventing and controlling coal and gas outburst prominent,first collapses a deep slit on the coal wall to increase gas release,then uses the minor cycle to enter the ruler,simultaneously also may u.

与排放钻孔相比,使用掏槽法防突具有省时、省力、容易操作以及安全性好等特点。

The saturated solution of potassium sulphate is got basing on the phase diagram of Mg~(2+),K~+//Cl~-,SO~(2-)_4-H_2O at 25℃,the line growth rate of potassium sulphate crystal was studied in the aqueous system in microscopic cell.

　文章依据硫酸镁转化法制取硫酸钾相图,配制25℃下Mg2+,K+//Cl-,SO2-4-H2O体系硫酸钾饱和溶液,用结晶槽法研究了该体系溶液在不同过饱和度下,硫酸钾晶体的线生长速率。