喷射混凝土是井巷支护的一项新技术,在煤炭、冶金矿山已有应用。我们学习兄弟单位的经验,遵照毛主席关于“一个正确的认识,往往需要经过由物质到精神,由精神到物质,即由实践到认识,由认识到实践这样多次的反复,才能够完成”的教导,先后在破碎冒落的辉绿岩、条带灰岩、白云质灰岩和硅化石灰岩及厚层石灰岩中进行了多次试验,并取得了较好的效果。 Sprayed concrete is a new technology of mine roadway support and has been applied in coal and metallurgical mines. We learn from the experience of our brother units and follow Chairman Mao’s argument that "a correct understanding often requires going through a process of materialism to spirituality, spirituality to materialism, that is, from practice to understanding and from practice to repetition in many ways, , It has conducted many experiments successively in crushed diabase, banded limestone, dolomitic limestone, silicified limestone and thick limestone, and achieved good results.