条带残留煤柱膏体充填综采技术研究与应用

发布时间：2018-04-20 15:07

本文选题：条带煤柱 + 围岩控制　；参考：《采矿与安全工程学报》2017年04期

【摘要】：为了彻底解放建筑物下条带开采遗留煤柱资源,采用理论分析与现场实践结合的研究方法,对条带遗留煤柱膏体充填复采煤柱稳定性、覆岩结构变化特征和膏体充填技术参数进行了探讨,得出了合理膏体充填体强度、充填率、煤柱宽度等参数指标。研究表明:条带开采遗留煤柱膏体充填复采时合理的煤柱宽度为5.0 m;充填率不得低于70%;安全系数取k=1.5~2.0,当开采煤柱宽度小于50 m时,充填体28 d抗压强度不小于5.0 MPa;当开采煤柱宽度小于100 m,充填体28 d抗压强度不小于2.6 MPa。以济北矿区岱庄煤矿生产技术条件,提出了条带遗留煤柱膏体充填开采回收技术,并确定了合理的工艺参数。实测表明,膏体充填开采达到充分采动后,地表最大下沉值为220 mm,下沉系数为0.076,取得了良好的地表沉陷控制效果。
[Abstract]:In order to completely liberate the remaining coal pillar resources under the building, the stability of the plaster filling and mining pillar of the strip left coal pillar is studied by combining the theoretical analysis with the field practice. The characteristics of overburden structure and the technical parameters of paste filling are discussed, and the reasonable parameters of paste filling strength, filling rate and coal pillar width are obtained. The results show that the reasonable width of coal pillar is 5.0 m, the filling rate must not be less than 70 m, the safety factor is 1.5 ~ 2.0, when the width of coal pillar is less than 50 m, the coal pillar width is less than 50 m. The compressive strength of the filling body is not less than 5.0 MPA in 28 days, and the compressive strength of the filling body in 28 days is not less than 2.6 MPA when the width of the open coal pillar is less than 100 m. Based on the production technical conditions of Daizhuang Coal Mine in Jibei Mining area, this paper puts forward the recovery technology of plaster filling and filling with strip residual coal pillar, and determines the reasonable technological parameters. The measured results show that the maximum subsidence value of the surface is 220 mm and the subsidence coefficient is 0.076 after the plaster filling mining has reached the full mining. Good surface subsidence control effect has been achieved.
【作者单位】：山东能源淄博矿业集团有限责任公司;
【基金】：山东省泰山学者专项经费项目(201309) 国家自然科学基金项目(51474209)
【分类号】：TD823.83

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