近距离煤层综放开采矿压显现规律研究

发布时间：2018-01-06 08:03

本文关键词：近距离煤层综放开采矿压显现规律研究　出处：《煤炭科学技术》2016年11期 　论文类型：期刊论文

【摘要】：为深入研究近距离煤层综放开采矿压显现规律,以六家煤矿SⅡN_26-7工作面为研究对象,采用数值模拟和现场实测方法对顶板运动规律、围岩应力规律和工作面支架工作阻力进行了分析。UDEC数值模拟结果表明:在上部6-6号煤层开采的影响下,SⅡN_26-7工作面初次来压步距和周期来压步距均有所降低,应力峰值由24.1 MPa降低至17.0 MPa,影响范围由40 m增大至120 m。通过工作面液压支架工作阻力监测,在上部采空区作用下,工作面支架初撑力偏低;工作面初次来压步距平均为29.9 m,周期来压步距平均值为13.6 m,周期来压期间动载系数约为1.13。研究表明:在上部采空区作用下,工作面超前支承压力和顶板来压步距均有所降低,矿压显现强度有所减弱。
[Abstract]:For the further study of close distance coal seam fully mechanized caving mining underground pressure behavior in six coal mine S II N_26-7 working face as the research object, numerical simulation and field measurement method of roof movement, rock stress rule and working face support working resistance was analyzed by.UDEC numerical simulation results show that the influence of upper 6-6 in No. coal mining under the first S II N_26-7 working face weighting and periodic weighting step distance decreases, the peak stress decreased from 24.1 MPa to 17 MPa, the influence range increase from 40 m to 120 M. by working face hydraulic support working resistance measurement in the upper goaf under mining effect, work face the support resistance is low; the working face first weighting average is 29.9 m, the periodic weighting step distance average value is 13.6 m, the cycle pressure during the dynamic load coefficient of about 1.13. research shows that: in the upper goaf mining effect under the abutment pressure on working face The pressure step of the roof is reduced and the strength of the ore pressure is weakened.

【作者单位】：辽宁工程技术大学矿业学院;内蒙古平庄能源股份有限责任公司六家煤矿;
【基金】：国家自然科学基金资助项目(51274117)
【分类号】：TD323
【正文快照】： 0引言近距离煤层是指井田开采范围内相邻两煤层的层间距离很近,且开采间能具有相互影响的煤层[1-5]。我国许多煤矿煤层开采都处在近距离煤层群环境中,采空区下的矿压显现规律是一个复杂的空间问题[6-13]。长期以来,国内外学者对近距离煤层开采的理论和技术进行了大量的研究,取

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