摘要
为研究23061工作面开采过程中的矿压分布规律及特征。采用数值模拟的方法建立了23061工作面走向和倾向的数值模拟模型,分别对走向和倾向开采过程中的矿压显现进行模拟分析。数值模拟结果显示,23061工作面基本顶初次来压步距约30 m,应力峰值为11.58 MPa;周期来压步距为15 m,峰值平均为10.79 MPa;工作面底板垂直应力随工作面推进的变化规律基本上与顶板一致,也有初次来压和周期来压显现;最大拉剪应力出现在最大压应力外侧约10 m处。
In order to study distribution law and features of mine pressure in 23061 working face mining, numerical simulation method was used in this paper to build numerical simulation model of 23061 working face and tendency, strata behaviors of trend and tendency were made simulation analysis respectively. The results showed that first weighting step distance of 23061 working face was about 3Ore, peak stress was 11.58 MPa; periodic weighting stop distance was 15 m, the average peak value was 10.79 MPa; the bottom vertical stress was basically consistent with roof with changing law of face movement, there were initial pressure and periodic pressure as well. The maximum shearing stress appeared at lOre of maximum lateral compressive stress.
出处
《煤炭与化工》
CAS
2017年第5期60-63,共4页
Coal and Chemical Industry
关键词
矿压显现
数值模拟
周期来压
初次来压
strata behaviors
numerical simulation
periodic pressure
initial pressure
