【摘要】 通过分析东保卫煤矿半煤岩巷道围岩破碎原因,针对掘进施工爆破震动破坏大以及支护形式不合理的问题,依据东保卫煤矿半煤岩巷道围岩特性,提出了半煤岩巷道控制爆破掘进及围岩"锚带喷"控制技术。对煤岩中爆破孔的参数以及对装药量进行改进,满足爆破掘进的同时又减小了爆破对围岩的震动,使围岩扰动半径控制在0.3 m以内;在控制爆破后,通过减少锚杆支护密度,增加两帮喷浆工序,降低了支护成本,减轻了工人劳动强度,半煤岩回采巷道掘进效率提高40%。更多还原

【Abstract】 With the analysis on the surrounding rock broken causes of the mine semi coal and rock roadway in Dong baowei Mine,according to the blasting vibration and irrational support mode of the roadway heading operation,based on the surrounding rock features of the semi coal and rock roadway,a controlled blasting heading of the semi coal and rock roadway and the "bolt/steel band/shotcreting" controlled technology of the surrounding rock was provided and the parameters of the blasting boreholes in the coal and rock were distinguished.The explosive loading was improved.Meanwhile the blasting heading could be met,the explosive loading could reduce the blasting vibration to the surrounding rock and the disturbance radius in the surrounding rock could be controlled within 0.3 m.With the controlled blasting,the bolt support density would be reduced.With the shotcreting on the two side walls of the roadway,the support cost and the labor strength could be reduced.Thus the heading efficiency of the semi coal and rock roadway was improved by 40%.更多还原