采场来压预测预报的力学分析

Mechanical analysis of prediction of weighting ofmining area

本文在采场老顶Ｗｉｎｋｌｅｒ弹性地基梁力学模型基础上，推导出采场顶板下沉的广义速度，并求出老顶的超前断裂距。根据采场工作面正常推进时顶板下沉速度呈线性增长而一旦老顶发生超前断裂后，下沉速度将急剧增长的原理，提出了一种新的采场来压预报方法，并成功地应用于生产实践中。

Based on the mechanical model of considering themain roof of mining area as a beam with Winker elasticbase, this paper derived the generalized velocity of mainroof subsidence and the pre-breaking distance of main roof.According to the principle which the subsidencevelocity is linearly proportional to usual advance of coalface,but suddenly increases after the pre-breaking ofmain roof occur,this paper presents a new method forpredicting the weighting of mining area. The method hasbeen successfully used in practice.