摘要
本文以榆树坡矿5105综放工作面为研究背景,通过对工作面回采期间支架工作阻力及工作面超前支承压力进行监测,结果表明,5105综放工作面开采期间,顶板初次来压步距为22.5~28.8 m,周期来压步距为7.6~14.1 m,来压期间支架工作阻力在22.7~38.1 MPa之间,动载系数在1.53~2.56之间;总体表现为工作面中下部来压强度较大、上部来压较小的特点。支承压力影响区在超前煤壁约40 m范围内,并在工作面前方22 m位置处达到峰值,约为7.1~7.9 MPa,集中系数约为1.65~1.97。
By monitoring the support working resistance and advanced abutment pressure during mining at 5105 fully-mechanized caving face of Yushupo Colliery,it is found that the step distance of roof first weighting is 22.5~28.8 m,periodic weighting step distance from 7.6~14.1 m;the pressure behavior features larger weighting strength in rhe middle and lower part and smaller in the upper part at the working face with the support working resistance of 22.7~38.1 MPa and the dynamic load coefficient between 1.53~2.56 while the influence zone of abutment pressure is 40 m ahead of the coal wall,peaking to 7.1~7.9 MPa at the position 22 m ahead of the working face with the concentration coefficient of about 1.65~1.97.
作者
程德中
Cheng Dezhong(Yushupo Coal Industry Co.,Ltd.,Ningwu,Shanxi 036700)
出处
《江西煤炭科技》
2021年第4期30-32,共3页
Jiangxi Coal Science & Technology
关键词
综放工作面
来压步距
动载系数
支承压力
fully-mechanized caving face
step distance of weighting
dynamic load coefficient
abutment pressure
