高应力厚煤层动压巷道底鼓力学机理及控制技术  

Mechanical mechanism and control technology of floor heave of high stress thick coal seam under dynamic pressure

作　　者：吴建星[1,2] 方树林[1,2] WU Jianxing;FANG Shulin(Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;Coal Mining and Design Branch,China Coal Research Institute ,Beijing 100013,China)

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]煤炭科学研究总院开采设计研究分院,北京100013

出　　处：《煤炭科学技术》2018年第12期86-91,共6页Coal Science and Technology

基　　金：国家自然科学基金青年基金资助项目(5170041507)

摘　　要：为解决五阳煤矿高应力厚煤层动压巷道底鼓问题,通过将破碎的底板围岩视为松散体,依据朗肯土压力理论,对巷道底板受力进行了力学分析,研究了底鼓的发生机理及控制技术。结果表明:(1)五阳矿76采区2号专用回风巷底板破坏形式是全断面挤压流动底鼓;(2)巷道本身的围岩特性、较高的水平地应力、相邻工作面采空区侧向支承压力及底板未采取加固措施是造成巷道底鼓的主要因素;(3)针对高应力厚煤层动压巷道围岩的控制,必须把巷道围岩看作一个整体,把对底板的控制放在与顶帮控制同等重要的地位,在支护顶帮的同时进行底板的加固,使整个巷道形成一个整体承载结构;(4)76采区2号专用回风巷采用顶帮强力锚杆锚索支护和底板预应力全长锚固注浆锚索支护技术后,围岩变形量满足安全使用要求,不仅有效地控制了巷道底鼓,而且保证了顶板和两帮的稳定性,使巷道整体的稳定性得到保障。In order to solve the problem of roodway floor heave of high stress thick coal seam under dynamic pressure in wuyang Coal Mine,Based on Rankine stress theory and treating the broken floor surrounding rock as loose body,the mechanism and control technology of floor heave are studied.Through this research,the Wuyang Coal Mine’s problem of floor heave in dynamic pressure roadway with high stress thick seam has been solved.The main conclusions of this paper are as follows:(1)Full-section extrusion flow of roadway surrounding rock leads to the floor failure of No.2 special return air roadway in No.76 mining area of Wuyang Coal Mine.(2)The main factors causing floor heave of roadway are the characteristics of surrounding rock,high horizontal stress,side abutment pressure of goaf in adjacent working face and failure to take reinforcement measures on floor.(3)The control of the floor must be placed in the same important position as the control of the roof.The reinforcement of the floor should be carried out while supporting the roof so as to make the whole roadway form an integral bearing structure.(4) After adopting strong roof bolt and anchor cable support and full-length pre-stressed grouting anchor cable support technology in roadway,the deformation of surrounding rock meets the requirements,which not only effectively controls the floor heave of roadway,but also ensures the stability of roof and two sides,and ensures the overall stability of roadway.

关 键 词：高应力 厚煤层 动压巷道 底鼓机理 底板控制 

分 类 号：TD353[矿业工程—矿井建设]