针对浅埋深综放工作面矿压显现剧烈、安全阀开启频繁的问题,对平朔井工三矿39107浅埋深综放工作面支架工作状况进行分析研究。采用矿压监测系统现场实测液压支架工作阻力,得到工作面基本顶初次来压步距为33.7 m,平均周期来压步距20.7 m,周期来压期间液压支架循环末阻力平均为9 700 kN,安全阀开启率平均为3.7%,工作面液压支架初撑力水平整体较低,分析表明液压支架存在3种不合理工作状态:安全阀调定压力不合理,前后立柱受力不均衡,部分支架串液。结合现场实测数据进行理论计算,得出39107工作面支架合理工作阻力应不低于12 000 kN。

According to the serious mine strata pressure behaviors of the fully mechanized top coal caving mining face in a shallow depth and the frequently opene d problems of the safety valve,an analysis study was conducted on the working status of the hydraulic powered supports applied in No.39107 fully mechanized top coal caving mining face in a shallow depth of Pingshuo No.3 Underground Mine.A mine strata pressure monitoring and measuring system was applied to the site measureme nt of the working resistances of the powered supports.The initial roof weighting step distance of the coal mining face measured was 33.7 m,the average periodical roof weighting step distance was 20.7 m,the average circulation resistance of the powered support was 9 700 kN during the periodical roof weighting period,the average ope n rate of the safety valve was 3.7% and the initial support force of the hydraulic powered support applied to the coal mining face was low in general.The analysis showe d that there were three irrational working statuses existed in the hydraulic powered supports.The set pressure of the safety valve was irational,the loadings of the front and real legs were not balance and the cross sprinklings were occurred in some powered supports.In combination with the site measured data,theoretical calculation wa s made and the rational working resistance obtained of the powered supports applied in No.39107 coal mining face should not be lower than 12 000 kN.

“十二五”国家科技支撑计划资助项目(2012BAB13B02-02)；开采设计事业部青年创新基金资助项目(KC-QNCX-2012-02)；