基于Winkler地基的仰(俯)采采场顶板破断分析  

Analysis of Roof Breaking in Upward(Downward)Mining Area Based on Winkler Foundation

作　　者：温耀军 WEN Yaojun

机构地区：[1]山西凯嘉能源集团有限公司,山西介休032000

出　　处：《山西焦煤科技》2023年第8期22-27,共6页Shanxi Coking Coal Science & Technology

摘　　要：基于Winkler地基假设,分析了仰(俯)采采场顶板破断机理,建立了仰(俯)采基本顶初次来压和周期来压的力学模型。运用ANSYS数值模拟软件对仰(俯)采采场顶板围岩应力分布进行数值模拟。通过理论分析、数值模拟和实例分析表明,仰斜开采和俯斜开采的初次来压步距相同,但由于基本顶的断裂位置不同导致仰采的来压强度大于俯采的来压强度。其次,由于基本顶上的最大拉应力大小不等,导致仰采的周期来压步距小于俯采。与俯采相比,仰采的围岩活动剧烈,矿压显现程度严重。但俯采工作面上覆岩层垂直压应力大于仰采,俯采工作面的超前支承应力也大于仰采。综合分析,得出俯斜开采比仰斜开采优越。Based on the Winkler foundation assumption,the mechanism of roof fracture in the upward(downward)mining area was analyzed,and the mechanical models of initial and periodic pressure of the upward(downward)mining basic roof was established.The research shows that the initial pressure steps are same in the upward mining and the downward mining,but the pressure intensity of upward mining is greater than that of downward mining because of the different fracture position of the basic roof.Secondly,because the maximum tensile stress of the basic top is different,the period of updraft is shorter than that of downdraft.Compared with overhead mining,the activity of surrounding rock in overhead mining is intense and the degree of ore pressure is serious.However,the vertical compressive stress of the overlying strata on the downward mining face is greater than that of the upward mining,and the advanced support stress on the downward mining face is also greater than that of the upward mining.Comprehensive analysis shows that inclined mining is superior to inclined mining.

关 键 词：仰(俯)采 顶板破断机理 Winkler地基假设 矿压显现 

分 类 号：TD327.2[矿业工程—矿井建设]