矸石淋浆充填控制覆岩移动变形优化设计研究
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摘要
针对充填开采条件下充填材料浪费严重难题,通过理论分析、现场观测的方式,对充填开采条件下覆岩移动变形机理、充填协作支撑体系稳固性进行分析。分析了充填条件下覆岩-充填体-煤柱的协作支撑机理,得到充填条件下覆岩稳定的力学判据,覆岩结构稳定下的侧向支撑压力1.71 MPa,采空区最小充实率87%。提出矸石淋浆充填采空区置换建下压覆资源的新思路,以安全有效控制地表移动变形,保证覆岩结构的稳定。
In view of the serious problem of filling material waste under filling mining conditions,through theoretical analysis and field observation, the mechanism of overburden movement and deformation of overlying rock under filling mining conditions and stability of filling cooperative support system are analyzed. The cooperative support mechanism of overburden filling body coal pillar under filling conditions is analyzed. According to the mechanical criterion of stability of overlying rock under filling conditions, the lateral support pressure under the stability of overlying rock structure is 1.71 MPa,and the minimum filling rate of goaf is 87%. A new idea of replacing the pressure overburden in the goaf with gangue slurry filling and filling area is proposed, which is safe and effective to control the change of the surface movement and ensure the stability of the overburden structure.
In view of the serious problem of filling material waste under filling mining conditions,through theoretical analysis and field observation, the mechanism of overburden movement and deformation of overlying rock under filling mining conditions and stability of filling cooperative support system are analyzed. The cooperative support mechanism of overburden filling body coal pillar under filling conditions is analyzed. According to the mechanical criterion of stability of overlying rock under filling conditions, the lateral support pressure under the stability of overlying rock structure is 1.71 MPa,and the minimum filling rate of goaf is 87%. A new idea of replacing the pressure overburden in the goaf with gangue slurry filling and filling area is proposed, which is safe and effective to control the change of the surface movement and ensure the stability of the overburden structure.
引文
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[2]乔乃琛,姜岩,赵琦,等.建筑物下压煤充填开采优化设计研究[J].煤炭科学技术,2012,40(11):19-23.
[3]许家林,尤琪,朱卫兵,等.条带充填控制开采沉陷的理论研究[J].煤炭学报,2007,32(2):119-122.
[4]郭文兵,邓喀中,邹友峰.条带开采地表移动参数研究[J].煤炭学报,2005,30(2):182-186.
[5]张吉雄,缪协兴,郭广礼.矸石(固体废物)直接充填采煤技术发展现状[J].采矿与安全工程学报,2009,26(4):395-402.
[6]胡炳南.我国煤矿充填开采技术及其发展趋势[J].煤炭科学技术,2012,40(11):1-5,18.
[7]余伟健,冯涛,王卫军,等.充填开采的协作支撑系统及其力学特征[J].岩石力学与工程学报,2012,31(S1):2 803-2 813.
[8]贾林刚,刘卓然.充填开采充填率与地表移动规律的数值模拟研究[J].辽宁工程技术大学学报:自然科学版,2015,34(9):1 010-1 015.
[9]孙万明,刘鹏亮,崔锋,等.高水材料条带充填开采地表沉陷主控因素分析[J].煤炭科学技术,2013,41(12):11-14.
[10]孙琦,张向东,杨逾.膏体充填开采胶结体的蠕变本构模型[J].煤炭学报,2013,38(6):994-1 000.