开采参数对远程上行卸压开采应力-裂隙的影响  

Influence of Mining Parameters on Stress and Fissure in Long Distance Upward Pressure Relief Mining

作　　者：肖家平[1] 窦礼同 史长胜[1] XIAO Jiaping;DOU Litong;SHI Changsheng(Department of Energy Engineering, Huainan Vocational Technical College, Huainan 232001, China;School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China)

机构地区：[1]淮南职业技术学院能源工程系,安徽淮南232001 [2]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《煤矿安全》2019年第2期61-66,共6页Safety in Coal Mines

基　　金：2018年度安徽省高校自然科学研究资助项目(KJ2018A0758);2010年度安徽省高校自然科学研究资助项目(KJ2010B208)

摘　　要：基于潘二煤矿A3煤和B4煤开采地质条件,建立了A3煤远程上行卸压开采数值模拟试验模型,研究了开采参数对远程上行卸压开采应力-裂隙演化特征影响。通过改变模型开采参数,获得了采厚与面长对远程上行卸压开采应力场、位移场分布的影响规律。研究结果表明,下部卸压煤层的开采厚度是影响上覆岩层移动破坏及裂隙发育高度的根本因素。随着采厚的增大,垮落带与断裂带的发育高度也随之增大,卸压范围随之增大;开采面长对于上行卸压开采卸压范围的影响较大,面长在一定程度上决定着煤层采动是否为充分采动,在充分采动条件下上行卸压层卸压范围要大于非充分采动条件下的卸压范围。Based on the mining geological conditions of A3 coal and B4 coal in Pan’er Coal Mine, a numerical simulation model of long-distance upward pressure relief mining of A3 coal was established. By changing the mining parameters of the model, the influence law of mining thickness and face length on stress field and displacement field distribution in long-distance upward pressure relief mining is obtained. The results show that the mining thickness of the lower relief seam is the fundamental factor affecting the movement and failure of the overlying strata and the height of fracture development. With the increase of mining thickness, the development height of caving zone and fracture zone increases, and the pressure relief range enlarges accordingly;the mining face length has a great influence on the pressure relief range of upward pressure relief mining, and to a certain extent,the face length determines whether the coal seam is fully mined or not, and the pressure relief range of the pressure relief bed under the condition of full mining is larger than that under insufficient mining condition.

关 键 词：卸压开采 数值模拟 应力-裂隙演化 开采参数 应力场 位移场 

分 类 号：TD325[矿业工程—矿井建设]