目前,煤矿岩石巷道掘进施工的主要方法钻眼爆破法,使用钻眼爆破法进行掘进时,爆破效果好坏、循环进尺大小和炮孔利用率的高低关键是掏槽,掏槽眼的布置方式分为直眼掏槽和斜眼掏槽.大量实践表明,受现有地质条件、巷道断面、凿岩机具、装药等因素的影响,每循环进尺要达到2.5~3.0 m,不论采用直眼掏槽还是斜眼掏槽,都容易出现掏槽效果不好,炮孔利用率低的现象.研制开发了一种液压掘进钻车,既可钻小直径普通钻孔,又能钻直径为100~110 mm的大孔,解决直眼掏槽爆破大直径炮孔自由面的问题,达到快速掘进和快速爆破的目的.%At present,drilling blasting method is the main one of the coal mine rock roadway excavation. In the process of roadway excavation by using drilling blasting method,the key influence factor of blasting effects,circulating footage and blasting hole utilization rate is cutting. The layout mode of the cutting holes can be divided into straight cutting and inclined cutting. A lot of the achievements of practice and study show that every circulating footage should be reached to 2. 5~3. 0 m under the influence of the existing geological conditions,roadway section,driving machine and charging;bad effects of cutting and low uti-lization rate of blasting hole can be cased whether using straight cutting ore inclined cutting method. Based on the above analy-sis results,the new hydraulic drilling rig that can not only drill small diameter ordinary blasting holes,but also can drill the large blasting holes with the diameter of 100~110 mm is developed,so as to solve the problems of free surface of large diame-ter blasting hole of straight hole cutting blasting. The purpose of rapid excavation and rapid blasting is achieved.
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