Vertical transportation system of solid material for backfilling coal mining technology

作     者：Ju Feng Zhang Jixiong,Zhang Qiang 

作者机构：School of MinesChina University of Mining&TechnologyXuzhou 221008China State Key Laboratory of Coal Resources&Mine SafetyChina University of Mining&TechnologyXuzhou 221008China 

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

年 卷 期：2012年第22卷第1期

页      面：41-45页

核心收录：

学科分类：082704[工学-辐射防护及环境保护] 081302[工学-建筑设计及其理论] 08[工学] 0827[工学-核科学与技术] 0813[工学-建筑学] 

基　　金：support for this work provided by the National Natural Science Foundation of China (No. 51074165) the major program of the National Natural Science Foundation of China (No. 50834004) the Innovation Project of Graduate Students of Jiangsu Province (No. CXZZ11-0308) 

主　　题：Fully mechanized backfilling coal mining Feeding bore hole Conical buffer Security guarantee 

摘      要：For transportation of solid backfill material such as waste and fly ash from the surface to the bottom of the shaft in a fully mechanized backfilling coal backfilling coal mining technology, we developed a new vertical transportation system to transport this type of solid backfill material. Given the demands imposed on safely in feeding this material, we also investigated the structure and basic parameter of this system. For a mine in the Xingtai mining area the results show that: (1) a vertical transportation system should include three main parts, i.e., a feeding borehole, a maintenance chamber and a storage silo; (2) we determined that 486 mm is a suitable diameter for bore holes, the diameter of the storage silo is 6 m and its height 30 m in this vertical transportation system; (3) a conical buffer was developed to absorb the impact during the feeding process. To ensure normal implementation of fully mechanized backfilling coal mining technology and the safety of underground personnel, we propose a series of security technologies for anti-blockage, storage silo cleaning, high pressure air release and aspiration. This vertical transporting system has been applied in one this particular mine, which has fed about 4 million tons solid material with a feeding depth of 350 m and safely exploited 3 million tons of coal.