摘要
针对余吾煤业公司北一采区辅运上山顶板下沉量大的实际情况,通过钻孔探测,确定了顶板破碎的范围,掌握了顶板岩性、裂隙发育及离层等情况;再以探测数据为依据,制定和实施了先注浆、后补打锚索的加固方案。通过7周的矿压观测,发现顶底板移近量为2mm,两帮移近量为3mm,取得了良好的加固效果。
It is introduced the composition, working mechanism and the detecting method of the rock drilling detecting instrument. According to the actual conditions about the roof fracture in the auxiliary transportation raise of the northern first district of the Yuwu coal Co. Ltd, it confirmed the range of broken roof zone and acquaint the conditions about lithologic characters and roof separation through boring detecting. Based on the detecting data, it is programmed grouting before installing anchor. By observation of rock pressure in 7 weeks,it is found that the roof-to-floor convergence is 2 mm and the side-to-side convergence is 3 mm. It has made a good reinforcement effect.
出处
《山西煤炭》
2010年第3期63-64,67,共3页
Shanxi Coal
关键词
岩层钻孔
岩层探测
注浆加固
离层
矿压观测
rock drilling
rock detecting
grouting reinforcement
roof separation
observation of rock pressure
