风积沙厚度对浅埋煤层大采高工作面矿压显现的影响  

Influence on strata behaviors at large mining height working face in shallow coal seam by depth of aeolian sand

作　　者：王翰钊[1,2] 李守国[1,3] 段鹏飞[1,2] 贾宝山[1,2] 刘昭 耿晓伟[1,2] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000 [3]煤科集团沈阳研究院有限公司煤矿安全技术国家重点实验室,辽宁抚顺113122 [4]神华集团神府东胜煤炭公司,陕西神木719315

出　　处：《中国安全生产科学技术》2016年第4期25-29,共5页Journal of Safety Science and Technology

基　　金：国家"十二五"科技支撑计划项目(2011ZX05041-003);国家自然科学基金项目(51404128)

摘　　要：针对神东矿区大柳塔煤矿52304工作面通过风积沙较厚区域时强烈的矿压显现现象,通过理论分析与物理相似模型以及现场测试等方法,建立工作面过风积沙区域时的力学模型,分析风积沙厚度对大采高工作面矿压显现规律的影响,对风积沙厚度对工作面关键层力学稳定性做出分析,并通过数值模拟对影响性进行研究。研究结果表明:风积沙厚度较大的开采区域,作用在覆岩主关键层结构上的载荷较大,造成主关键层破断块体的结构回转变形失稳,造成工作面矿压显现极强烈;大采高和风积沙厚度较大条件下距煤层较远的主关键层破断运动也会对工作面矿压显现产生影响,且采高、厚风积沙因素缺少其中一个时,主关键层均不会对工作面矿压产生明显影响。Aiming at the strong strata behaviors phenomenon at 52304 working face in Daliuta Mine of Shendong mining area when passing through the area with thicker aeolian sand,through the methods of theoretical analysis,physical similar model and field test,a mechanical model of working face when passing through the area with aeolian sand was established. The influence on strata behaviors regularity at large mining height working face by the depth of aeolian sand was analyzed,as well as the influence on the mechanical stability of key layers at the working face by the depth of aeolian sand,and the impact was studied by numerical simulation. The results showed that in the mining area with the larger depth of aeolian sand,the load acting on the structure of primary key layer in overburden is larger,resulting in the rotary deformation and instability of breaking block structure in primary key layer,so as to cause the strong strata behaviors at the working face. Under the conditions of large mining height and larger depth of aeolian sand,the breaking movement of primary key layer being far away from the coal seam will influence the strata behaviors at the working face,and when any of the conditions is lacking,the primary key layer will not influence the strata behaviors at the working face.

关 键 词：近浅埋煤层 矿压显现 风积沙厚度 力学分析 

分 类 号：X936[环境科学与工程—安全科学]