摘要
为了掌握7.0 m支架综采工作面矿压显现规律、覆岩结构特征与支架的适应性,在补连塔煤矿22303工作面开展了7.0 m支架综放开采试验。在现场实测22303工作面7.0 m支架不同开采阶段两巷超前矿压规律的基础上,采用数值模型对两巷支承压力的变化及两巷支承压力随采高的变化情况进行了分析。结果显示:大采高模型的应力影响范围随着开采逐渐增大,影响范围增速较快,应力值也增大较快,其开采引起的超前影响范围达到65 m。
In order to grasp mine pressure behavior laws, strata structure features and support adaptability of fully mechanized working face with 7.0 m supprot, fully mechanized caving mining experiment was carried out at 22303 working face in Bulianta Coal Mine with 7.0 m support. On the basis of measuring advanced mine pressure of different mining stages of two roadways at 22303 working face with 7.0 m support, numerical modeling is used to analyze the change of abutment pressure and the change of two lanes bearing pressure with mining height. Results show that the stress influence scope of large mining height model is gradually increasing with the mining, and the growth of impact scope is rapid and stress value increases rapidly, and the advanced effect area caused by mining is 65 m.
作者
祁杰
刘柄良
QI Jie LIU Bingliang(Bulianta Coal Mine, China Shenhua Shendong Coal Group Corporation Limited, Ordos 017209, China)
出处
《煤矿安全》
北大核心
2017年第B03期10-14,共5页
Safety in Coal Mines
关键词
大采高
综放开采
超前矿压
支承压力
数值模拟
large mining height
full-mechanized caving mining
advanced ground pressure
abutment pressure
numerical modeling
