Research on floor pre-tension anchorage technique for high stress roadway in deep underground mines
There are two problems associated with using floor bolting to control floor heave; difficulty in hole drilling and poor anchorage.This paper analyzes the transportation characteristics of drill cuttings during drilling of floor bolt holes.It was found that the interaction among the three-region of cuttings is the key factor that restricts the high-efficiency drilling of floor bolt hole.So the pump suction reverse circulation method was adopted to eliminate the formation of the three-region of cuttings.The pump suction reverse circulation System speeds up the hole drilling.By analyzing the causes that restricts the floor anchorage, a method to reirforce the floor strata that adopts the down-anchoring and up-grouting technique was developed.It employs the large-area and high-strength reinforcement in the floor of roadway to control the floor heaves in high-stress deep mines.
Zhang Hui Cheng Lixing Liu Shaowei
School of Energy Science and Engineering,Henan Polytechnic University, Jiaozuo 454000, China
国际会议
The 34th International Conference on Ground Control in Mining (ICGCM) 2015(34届国际采矿岩层控制会议)
焦作
英文
81-84
2015-10-17（万方平台首次上网日期，不代表论文的发表时间）