A method for computing unsupported roof distance in roadway advancement and its in-situ application

作     者：Chen Yong Bai Jianbiao Yan Shuai Hao Shengpeng Dao Viet Doan 

作者机构：State Key Laboratory of Coal Resource and Safe Mining Key Laboratory of Deep Coal Resource Mining Ministry of Education of China China University of Mining and Technology Xuzhou 22116 China Hanoi University of Mining and Geology Hanoi 10000 Viet Nam 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2016年第26卷第4期

页      面：551-556页

核心收录：

学科分类：081901[工学-采矿工程] 0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：supported by the State Key Laboratory of Coal Resources and Sate Mining,China University of Mining and Technology (No.SKLCRSM13X07) the National Natural Science Foundation of China (No.51174195) Chinese National Programs for Fundamental Research and Development (No.2013CB227900) the Fundamental Research Funds for the Central Universities (No.2014XT01) 

主　　题：井下巷道 现场应用 板间距 顶板稳定性 计算 护顶 稳定性评价 预应力锚杆 

摘      要：A reasonable unsupported roof distance(URD) when advancing underground coal mine roadways can contribute greatly to safe and rapid roadway development.A mechanical model of the roof,using the relationship between the roof stress distribution and URD,obtained by the difference method,and roof stability according to the in-situ roof stress and rock mass strength was *** subsequently designed a proper range of URD,developed a testing method of URD with the function of mining protection,evaluated roof stability through analyzing the test data and then determined a reasonable *** the factors of the geological conditions,the immediate roof stability and the efficiency of the labor arrangement system,the URD of the advancing roadway of 9802 working face in Zhangshuanglou coal mine was determined to be 6 m using the proposed *** results show that,when a 2 m length of roadway was reinforced by temporary support and high pre-stressed bolt support after the roadway advancement of 6 m per cycle,the speed and the security of the roadway development can be achieved and the advance rate can reach more than 400 m per month.