直接顶厚度对厚硬顶板工作面矿压显现规律的影响  

Influence of Immediate Roof Thickness on Strata Behaviors Rule in Thick-hard Roof

作　　者：邵淑成 杨科[1] 徐伟[2] 金声尧 

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控安徽省重点实验室,安徽淮南232001 [2]淮南矿业(集团)有限责任公司,安徽淮南232001

出　　处：《煤矿安全》2017年第3期202-204,208,共4页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2016YFC0801402);国家自然科学基金面上资助项目(51374011)

摘　　要：为研究直接顶厚度变化对厚硬基本顶工作面开采的影响,以淮南潘二矿11313工作面的工程条件为研究背景,基于煤岩物理力学参数测试分析,构建了UDEC^(2D)数值模拟模型,分析了无直接顶、1.58 m直接顶、5 m直接顶、9 m直接顶4种顶板条件下综采工作面矿压特征。研究表明:0~1.58 m直接顶条件下的初次来压步距小于5~9 m直接顶条件,薄直接顶条件下的支架动载系数较大,工作面煤壁片帮严重;5~9 m直接顶条件下的持续来压步距大,对支架的工作阻力要求高。In order to study the influence of immediate roof thickness on thick-hard roof mining,taking engineering specifications at11313 longwall working face in Pan＇er Coal Mine as research background,based on analyzing physical and mechanical parameters of coal and rock,the UDEC^（2D） model was built to simulate patterns of ground pressure with fully mechanized coal mining in different thickness of immediate roof including 0 m,1.58 m,5 m and 9 m.Results show that immediate roof is the key role in transferring load between thick-hard rock and hydraulic support set at working face.When the thickness of immediate roof is thin of 0 to 1.58 m,the first weighting interval of main roof is less than the condition of 5 m to 9 m.under the condition of thin immediate roof,the dynamic load coefficient of support is larger,and wall caving of working face is serious.However,when the thickness of immediate roof is from 5 m to 9 m,weighting time and interval will be increased and working resistance of support will be needed.

关 键 词：厚硬顶板 直接顶厚度 矿压控制 液压支架 动载系数 

分 类 号：TD323[矿业工程—矿井建设]