Bureau of Gansu Coal Mine Safety Supervision

为解决铁北矿综放工作面矿压显现强烈,频繁发生切顶压架事故的难题,通过现场观测和理论分析可知,特殊顶板条件及支架工况差是导致切顶压架事故发生的主要原因,采用KJ21顶板灾害监测预警系统,对反映支架工况的支架初撑力、支架循环末阻力、支架安全阀开启、周期来压步距、支架不保压、支架不平衡等6个关键指标进行监测分析,采用数理统计和类比方法分析监测数据得到了导致工作面发生切顶压架事故的5个主要原因,据此提出了防止工作面切顶压架事故发生的措施。结果表明,对工作面支架工况进行监测分析有利于预防切顶压架事故发生,使工作面平均月产量由原来的17万t提高至25万t以上。

In order to solve serious mine strata pressure behavior and roof cutting powered support jammed accident frequently occurred in the fully- mechanized t op coal caving mining face in Tiebei Mine, the site observation and theoretical analysis showed that special roof condition and poor powered support performances wer e the major factors to cause the roof cutting powered support jammed accident. The KJ21 mode roof disaster monitoring and measuring early warning system was appli ed to the monitoring and analysis on powered support initial support force, a circulation end resistance, safety valve opening, periodical roof weighting distance, powere d support no pressure keeping, powered support unbalanced and other key indexes. With a mathematical statistics and analogy method applied to the analysis on the monitored and measured data, five major factors to cause the roof cutting powered support jammed accident were obtained and thus the measures to prevent and contr ol the roof cutting powered support jammed accident occurred in the coal mining face were put forward. The results showed that the monitoring and analysis conducted on the powered support performances of the coal mining face would be favorable to prevent and control the roof cutting powered support jammed accident occurred and could make the month production of the coal mining face increased from 170 000 t to over 250 000 t.

“十二五”国家科技支撑计划资助项目(2012BAB13B02-02)；