综放工作面破碎顶板加固技术研究

Reinforcement Technology for Broken roof of fully-mechanized face

综放工作面在推进过程中,如果遇到地质构造带或者推进速度过慢,会造成顶板破碎、端面距加大、片帮、漏顶,甚至支架上冒空,给安全埋下了巨大隐患。三河口煤矿采用马丽散预注浆维护顶板的完整性获得成功,取得了很好的经济效益和社会效益。

In the process of mining fully mechanized top coal caving face, if meet the geological structure belt or advancing speed is too slow, will cause the broken roof, the increase of tip-to-face distance, spalling, roof leakage, even to caving to hollow upon the safety bracket, which buried the huge hidden trouble. Sanhekou coal mine using Ma Li pre-grouting to keep the integrity the roof made a success, and achieved good economic and social benefits.