薄煤层工作面液压支架可靠性评价及围岩控制技术研究
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摘要
以某矿为工程背景,通过理论分析、现场监测对工作面液压支架的可靠性进行分析,并借助现场检测、数值模拟的方法对片帮、煤柱的合理宽度进行研究。通过研究发现:该矿选择的额定工作阻力为4 000 kN的液压支架能够满足该矿回采的需要;在正常生产期间工作面煤壁片帮、漏顶现象并不严重,仅在顶板周期来压期间出现较为明显的煤壁片帮、漏顶现象,片帮深度小于等于100 mm所占的比例较大;同时通过对工作面侧向支承压力分析发现,其影响范围为工作面侧向30～35 m,剧烈影响范围为20 m左右,峰值大小约30 MPa,峰值距工作面侧向距离7～9 m,由此判断,工作面正常留设煤柱的合理尺寸为30～35 m;沿空掘巷时,留设煤柱的合理尺寸可以确定为7～9 m。
Based on the engineering background of a mine,the reliability of hydraulic support in working face is analyzed through theoretical analysis and on-site monitoring,and the reasonable width of side and coal pillar is studied by means of on-site testing and numerical simulation.Through research,it is found that the hydraulic support with rated working resistance of 4 000 kN can meet the needs of mining in this mine;the phenomenon of slice wall and roof leakage in working face is not serious during normal production period,only obvious phenomenon of slice wall and roof leakage occurs during the period of periodic roof weighting,and the depth of slice wall is less than 100 mm.At the same time,through the analysis of the lateral abutment pressure of the working face,it is found that the influence range is 30～35 m in the lateral direction of the working face,the violent influence range is about 20 m,the peak value is about 30 MPa,and the peak value is about 7～9 m in the lateral direction of the working face.In roadway,the reasonable size of coal pillars can be determined to be 7～9 m.
Based on the engineering background of a mine,the reliability of hydraulic support in working face is analyzed through theoretical analysis and on-site monitoring,and the reasonable width of side and coal pillar is studied by means of on-site testing and numerical simulation.Through research,it is found that the hydraulic support with rated working resistance of 4 000 kN can meet the needs of mining in this mine;the phenomenon of slice wall and roof leakage in working face is not serious during normal production period,only obvious phenomenon of slice wall and roof leakage occurs during the period of periodic roof weighting,and the depth of slice wall is less than 100 mm.At the same time,through the analysis of the lateral abutment pressure of the working face,it is found that the influence range is 30～35 m in the lateral direction of the working face,the violent influence range is about 20 m,the peak value is about 30 MPa,and the peak value is about 7～9 m in the lateral direction of the working face.In roadway,the reasonable size of coal pillars can be determined to be 7～9 m.
引文
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[15] 唐忠亮,黄凯,沈蓥.极复杂条件下伪俯斜综采支架回撤技术[J].煤炭科学技术,2015,43(S1):10-12.Tang Zhongliang,Huang Kai,Shen Ying.Retraction technology of pseudo-tilt fully mechanized mining support under extremely complicated conditions[J].Coal Science and Technology,2015,43(S1):10-12.
[2] 崔雪峰.基于FLAC3D的综放面矿压显现规律研究[J].能源与环保,2018,40(9):170-175.Cui Xuefeng.Research on the mining pressure law of fully mechanized caving face based on FLAC3D[J].China Energy and Environmental Protection,2018,40(9):170-175.
[3] 段思宇.极近距离煤层破碎顶板工作面支架选型及应用[J].煤炭工程,2019,51(5):48-50.Duan Siyu.Selection and application of support for working face of coal seam broken roof in very close distance[J].Coal Engineering,2019,51(5):48-50.
[4] 韩文龙.基于UDEC的液压支架支护强度参数研究[J].陕西煤炭,2019,38(3):24-27.Han Wenlong.Research on strength parameters of hydraulic support based on UDEC[J].Shaanxi Coal,2019,38(3):24-27.
[5] 张杰.大倾角综采工作面液压支架的优化设计[J].机械管理开发,2019,34(4):34-36.Zhang Jie.Optimal design of hydraulic support for large dip angle fully mechanized mining face[J].Machinery Management Development,2019,34(4):34-36.
[6] 郑超,杨峰峰,张巨峰,等.不等厚松散层大采高工作面支架适应性研究[J].煤炭技术,2019,38(5):36-39.Zheng Chao,Yang Fengfeng,Zhang Jufeng,et al.Study on the adaptability of large mining height working face brackets with unequal thickness and loose layer[J].Coal Technology,2019,38(5):36-39.
[7] 侯芳.边角煤综采工作面液压支架适应性分析[J].机械管理开发,2019,34(4):75-76,92.Hou Fang.Adaptability analysis of hydraulic support for fully mechanized mining face in corner coal[J].Mechanical Management and Development,2019,34(4):75-76,92.
[8] 庞明超.压力在线监测系统在井下液压支架的设计[J].当代化工研究,2018(12):95-96.Pang Mingchao.Design of pressure online monitoring system in underground hydraulic support[J].Contemporary Chemical Research,2018(12):95-96.
[9] 何磊,刘夫军.20102综采工作面液压支架合理支护强度模拟研究[J].山东煤炭科技,2018(12):5-7,9.He Lei,Liu Fujun.Simulation study on reasonable support strength of hydraulic support of 20102 fully mechanized mining face[J].Shandong Coal Science and Technology,2018(12):5-7,9.
[10] 王海军,孙红发.8.8 m超大工作阻力液压支架液压系统匹配性研究[J].煤炭技术,2018,37(12):209-211.Wang Haijun,Sun Hongfa.Research on the matching of hydraulic system of 8.8 m super large working resistance hydraulic support[J].Coal Technology,2018,37(12):209-211.
[11] 贾虎强.ZZ3200/11/21型液压支架的优化[J].矿业装备,2018(6):38-39.Jia Huqiang.Optimization of ZZ3200/11/21 hydraulic support[J].Mining Equipment,2018(6):38-39.
[12] 刘彦君.大倾角煤层综采液压支架选型研究[J].山东煤炭科技,2018(10):147-149.Liu Yanjun.Research on selection of hydraulic support for fully mechanized mining in large dip angle coal seam[J].Shandong Coal Science and Technology,2018(10):147-149.
[13] 赵凯.松散承压含水层下采煤工作面支架选型[J].能源技术与管理,2018,43(5):80-82.Zhao Kai.Selection of support faces for mining face under loose confined aquifer[J].Energy Technology and Management,2018,43(5):80-82.
[14] 焦江枫.岳城煤矿下层工作面支护可靠性分析研究[J].能源与节能,2017(10):51-52,54.Jiao Jiangfeng.Research on reliability analysis of lower working face support in Yuecheng Coal Mine[J].Energy and Energy Conservation,2017(10):51-52,54.
[15] 唐忠亮,黄凯,沈蓥.极复杂条件下伪俯斜综采支架回撤技术[J].煤炭科学技术,2015,43(S1):10-12.Tang Zhongliang,Huang Kai,Shen Ying.Retraction technology of pseudo-tilt fully mechanized mining support under extremely complicated conditions[J].Coal Science and Technology,2015,43(S1):10-12.