大采高工作面顶板破坏规律的推进速度效应  

Advancing Speed Efficiency of Roof Failure Law in Large Mining Height Working Face

作　　者：付玉平[1] 李川田[1] 庞杰文[1] 吉小峰 FU Yuping;LI Chuantian;PANG Jiewen;JI Xiaofeng(College of Safety and Emergency Management Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学安全与应急管理工程学院,太原030024

出　　处：《煤炭技术》2022年第2期14-17,共4页Coal Technology

基　　金：国家自然科学基金项目(51344002);山西省高等学校科技创新项目(2019L0641);山西省面上青年基金项目(201901D211294)。

摘　　要：为研究工作面推进速度加快后,顶板岩层破坏规律,依据神东矿区上湾煤矿地质赋存条件,采用相似模拟试验及现场实测的方法,通过对比分析不同推进速度条件下工作面直接顶、基本顶及其上覆岩层变形、下沉、垮落规律,定量地表征了大采高工作面顶板破坏规律的推进速度效应。研究结果表明:不同推进速度条件下,直接顶、基本顶岩层变形、下沉垮落演化规律保持一致;基本顶岩层周期来压步距随工作面推进速度加快而显著增大;直接顶、基本顶及其上覆岩层下沉量随工作面推进速度加快而呈不同程度的减小;工作面来压持续距离随工作面推进速度加快而明显延长,来压强度和动载系数呈不同程度增大。In order to research roof failure law,based on the condition of Shangwan coal mine in Shendong mining area,according to the method of similar simulation and field test,quantitative characterization of advancing speed efficiency of roof failure law in large mining height working face by contrast and analyzing with deformation,sinking and collapse law under different mining velocity conditions of immediate roof,main roof and overlying strata.The results show that deformation,sinking and collapse law of immediate roof and main roof is keeping consistent under different mining velocity conditions;periodic weighting step of main roof increases significantly with advancing speed of working face;the subsidence of immediate roof,main roof and overlying strata decreases to varying degrees with the advancing speed of working face;the continuous distance of working face pressure increases with the advancing speed,and the periodic pressure strength and dynamic factor increase in varying degrees.

关 键 词：大采高工作面 顶板破坏规律 相似模拟试验 现场实测 推进速度效应 

分 类 号：TD325[矿业工程—矿井建设]