Study of stability of surrounding rock and characteristic of overburden strata movement with longwall roadway backfill coal mining

被引：0
|
作者：
Sun Q. [1 ,2 ]
Zhang J.-X. [1 ,2 ]
Yin W. [1 ,2 ]
Zhou N. [1 ,2 ]
Liu Y. [1 ,2 ]
机构：
[1] State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou
[2] Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology, Xuzhou
来源：
Meitan Xuebao/Journal of the China Coal Society | 2017年 / 42卷 / 02期
关键词：
Filling material; Roadway backfill; Strata movement characteristics; Water-resisting layers;
D O I：
10.13225/j.cnki.jccs.2016.6019
中图分类号：
学科分类号：
摘要：
In China's western ecological fragile coal mining area, the traditional coal mining technology causes many environmental problems with low coal recovery.To solve the problems and to improve coal recovery, the longwall roadway backfill coal mining method was proposed as a solution.Through the systematic analysis of the roadway layout and backfill mining technology, the difficulties and key points in the technology were shown.Based on the strata movement characteristics in the roadway backfill coal mining, the mechanical model of coal mining in stope was established.Then, the equation of roof deflection curve with corresponding mechanical analysis and the calculation formulas of coal pillar were calculated.And an assessment on the instability conditions of the coal pillars were also provided combining the ultimate strength theory.Combined with one engineering case of roadway backfill mining in Shaanxi Changxing Coal Mine, with the test results of backfill material mechanical properties, the mining plan of roadway backfill coal mining was optimally designed.At the same time, the 3DEC numerical simulation software was used to study and analyse the overlying strata movement of the water-resisting layer in Yan'an Formation interlayer fissure confined water and the Quaternary loose pore phreatic water.Field application results show that this technology can effectively control the stability of surrounding rock and the overlying strata movement of water-resisting layer, improve the recovery rate of coal resources and provide a reference for the coordinated development of the western mining area resources and environmental protection. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：404 / 412
页数：8
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