煤矿综放工作面矿压显现规律与切顶压架预警指标分析  

Mining Pressure Behavior and Pre-warning Index of Roof Cuttingand Supports Crushing in Fully-mechanized Top-coal Caving Face of Coal Mine

作　　者：樊九林 彭杨皓 彭贞杰 宋永明 苏欣 刘建涛 FAN Jiulin;PENG Yanghao;PENG Zhenjie;SONG Yongming;SU Xin;LIU Jiantao(Huadian Coal Industry Group Co.,Ltd.,Beijing 100035,China;School of Instrument Science and Opto-Electronics Engineering,Beijing Information Science and Technology University,Beijing 100192,China;Inner Mongolia Mengtai Buliangou Coal Industry Co.,Ltd.,Zhungeer Banner 017100,China)

机构地区：[1]华电煤业集团有限公司,北京100035 [2]北京信息科技大学仪器科学与光电工程学院,北京100192 [3]内蒙古蒙泰不连沟煤业有限责任公司,内蒙古准格尔旗017100

出　　处：《山西煤炭》2024年第3期99-107,共9页Shanxi Coal

基　　金：中国华电集团有限公司科技项目(CHDKJ21-02-16)。

摘　　要：煤矿特厚煤层综放开采时受技术装备等条件限制,放顶煤时由于顶板松散程度较高难以形成稳定结构,导致工作面顶板更容易大面积切落,瞬间冲击支架,损坏液压支架结构,严重影响矿井安全高效生产。以不连沟煤矿F6218综放工作面为工程背景,通过实测数据分析了工作面支架初撑力、安全阀开启情况及工作阻力频率等支架基本工况,揭示了工作面矿压显现规律,建立了适合该矿的切顶压架灾害预警指标体系。结果表明:不连沟煤矿预警指标界限分别为循环增阻率40 kN/min、安全阀开启率50%、动载系数1.4、活柱下缩量500 mm、支架前柱不低于25 MPa,前柱合格率不低于90%;后柱不低于20 MPa,后柱合格率不低于90%。In the fully-mechanized top coal caving mining of extra-thick coal seams,due to the limitations of technical equipment and other conditions,it is difficult to form a stable structure during top coal caving due to the high looseness of the roof,which can easily cause large-scale roof cutting collapse at the working face,instant impact on the supports,damage to the hydraulic support structures,and severely affect on the safe and efficient mine production.Taking the F6218 fully mechanized top-coal caving face of Buliangou Coal Mine as the engineering background,this study analyzed the basic support conditions,including initial support force,the opening of the safety valve,and working resistance frequency,through measured data.The study revealed the mine pressure behavior of the working face and established a pre-warning index system for roof cutting and support crushing disasters suitable for this mine.The results show that the pre-warning index thresholds for Buliangou Coal Mine are 40 kN/min of cyclic resistance increase rate,50%of safety valve opening rate,1.4 of dynamic load coefficient,500 mm of moveable column shrinkage,not less than 25 MPa in front column of the support,and not less than 90%of the qualification rate of the front column,not less than 20 MPa in rear column,and not less than 90%of the qualification rate of the rear column.

关 键 词：矿压显现 切顶压架预警指标 支架工况 综放开采 特厚煤层 

分 类 号：TD353[矿业工程—矿井建设]