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为了提高水平坑道掘进效率,我队选择任虎山沟区302坑独头坑道,结合生产进行了药壶爆破(扩底爆破)试验,正式进行试验标定6次,没有进行试验标定的但根据试验观察及资料整理分析,认为较准确而具有代表性的资料计有14次.通过试验分析结果,认为这一方法确是提高水平坑道掘进效率的一项行之有效的力法.(一)试验条件及方法1.试验条件:(1)地质岩石情况:该区岩石系组识致密,层理不发达的花岗岩及基性岩脉,走向北45°东,一般
In order to improve the efficiency of horizontal tunneling, our team chose to undertake the tunnel blasting (bottom explosion) test in combination with the production of single pit tunnel at No. 302 pit in Huhushangou District. The test was formally carried out 6 times without any calibration test but according to the experimental observation And data analysis, that more accurate and representative of the information there are 14 times.Through the test analysis of the results, that this method is indeed an effective way to improve the level of tunneling efficiency of (1) test conditions And Method 1. Test Conditions: (1) Geological Rocks: The lithology of the area is characterized by a dense densification of granite and underlying veins with a low level of bedding and a 45 ° eastward direction, generally