摘要
在超长工作面综放开采过程中,由于工作面长度增加使采场倾向各部的矿压显现规律存在差异,以平朔井工一矿19106工作面为工程背景,利用弹塑性理论和数值模拟对超长工作面综放开采矿压显现规律进行研究。结果表明:理论计算工作面超前支承压力峰值为18.7 MPa,峰值距煤壁距离为16 m;模拟结果工作面倾向上部、中部、下部超前支承压力峰值强度分别为18.32、18.64、17.81 MPa,与理论计算结果基本一致,其影响范围分别为70~95 m、75~100 m、67~93 m;同时根据采场基本顶塑性区破坏范围及形式和现场实测数据,确定了顶板初次来压步距范围及工作面周期来压步距。
In the process of fully mechanized caving mining at super long working face, because of the increase of working face length, there will be differences in strata behaviors laws of stope tendency parts. Taking 19106 working face in Pingshuo No.1Mine as the engineering background, by using elastic and plastic theory and numerical model, the laws of mining pressure of fully mechanized caving mining are studied. The results show that the peak value of advanced abutment pressure of working face is18.7 MPa, and the distance from the peak value to the coal wall is 16 m; the peak stress of the upper, middle and lower parts of the working face is 18.32 MPa, 18.64 MPa, 17.81 MPa respectively, and the impact range is 70 to 95 m, 75 to 100 m, 67 to 93 m respectively; at the same time, according to the damage scope and form of the plastic zone of stope roof and measured data, we can determine the first weighting step range of roof and periodic weighting step range of working face.
出处
《煤矿安全》
CAS
北大核心
2017年第2期188-191,共4页
Safety in Coal Mines
关键词
超长工作面
超前支承压力
矿压显现
塑性区
综放开采
super long working face
advanced abutment pressure
strata behaviors
plastic zone
fully mechanized caving mining
