刀把式工作面矿压显现特征研究
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摘要
针对山西灵石某矿监测刀把式工作面顶板矿压显现特征与预测切眼对接前后顶板来压步距变化的安全生产技术问题,采用薄板理论给出刀把式工作面来压垮落步距,并分析内切眼顶板初次破断以及切眼对接后的周期性破断形式。结合现场半自动综采支架压力计采集的实时数据,验证薄板理论可以为此类顶板条件提供理论指导。结果表明:顶板实际破断形式与运用薄板理论建立的模型基本相符,且垮落步距计算理论值19.3m与实际观测值20.3m的误差率仅为4.9%,满足工程预测要求。
Aiming at the strata behavior characteristics in monitoring knife-handle-type face of Lingshi mine in Shanxi,as well as the safety production technology in forecasting the change of roof weighting step before and after the open-off cut docking,the thin plate theory was used to calculate the periodic roof weighting step of knife-handle-type face.And the periodic breakage forms were analyzed in different periods,including the first breakage of the roof with internal cut and the period after the docking.Combining with the real-time data collected by the semi-automatic fully mechanized support pressure gauge,the thin plate theory was verified to provide theoretical guidance for such roof conditions.The results showed that the actual breakage form of roof was basically consistent with the model established by using thin plate theory,and the error rate between the theoretical value of 19.3 mand the actual observation value of 20.3 m was only 4.9%,which met the requirements of engineering prediction.
Aiming at the strata behavior characteristics in monitoring knife-handle-type face of Lingshi mine in Shanxi,as well as the safety production technology in forecasting the change of roof weighting step before and after the open-off cut docking,the thin plate theory was used to calculate the periodic roof weighting step of knife-handle-type face.And the periodic breakage forms were analyzed in different periods,including the first breakage of the roof with internal cut and the period after the docking.Combining with the real-time data collected by the semi-automatic fully mechanized support pressure gauge,the thin plate theory was verified to provide theoretical guidance for such roof conditions.The results showed that the actual breakage form of roof was basically consistent with the model established by using thin plate theory,and the error rate between the theoretical value of 19.3 mand the actual observation value of 20.3 m was only 4.9%,which met the requirements of engineering prediction.
引文
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[2]兰立信,韩晓乐,闫浩.布尔台矿区42102工作面大采高改综放开采矿压显现分析[J].矿业研究与开发,2016,36(4):82-85.
[3]汤建泉,宋文军,李干,等.低位巨厚岩层破断规律及矿压显现研究[J].矿业研究与开发,2016,36(11):60-64.
[4]黄继辉,王连国,周冬磊,等.俯采采场顶板破断运动特征和矿压显现规律研究[J].矿业研究与开发,2012,32(2):22-25,79.
[5]李肖音,高峰,钟卫平.基于板模型的采场顶板破断机理分析[J].采矿与安全工程学报,2008,25(2):180-183.
[6]史红,姜福兴.采场上覆大厚度坚硬岩层破断规律的力学分析[J].岩石力学与工程学报,2004,23(18):3066-3069.
[7]于洪,刘海鑫.薄基岩破碎顶板综采工作面对接技术[J].煤炭工程,2016,48(7):63-68.
[8]王海山,赵永金,张俊.综采工作面的对接[J].煤炭科学技术,2002,30(6):27-29.
[9]郑友东,李剑锋,刘恒新.综放工作面回采对接技术的研究与实践[J].煤炭工程,2008,40(8):59-60.
[10]王新丰,高明中.变长工作面采场顶板破断机理的力学模型分析[J].中国矿业大学学报,2015,44(1):36-44.
[11]浦海,黄耀光,陈荣华.采场顶板x-o型断裂形态力学分析[J].中国矿业大学学报,2011,40(6):835-840.
[12]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003:80-84.
[13]黄长国,华心祝.运用弹性薄板理论预测采煤工作面基本顶来压步距[J].煤炭安全,2013,44(5):206-209.
[14]毕继红,王辉.工程弹塑性力学[M].天津:天津大学出版社,2003.
[15]贾喜荣,翟英达.采场薄板矿压理论与实践综述[J].矿山压力与顶板管理,1999,16(3/4):22-25.