厚硬基本顶综放沿空巷道应力分布特征及煤柱宽度确定  

Stress Distribution Characteristics of Gob Side Entry in Fully Mechanized Top Coal Caving Face with Thick and Hard Basic Roof and Determination of Coal Pillar Width

作　　者：李绪萍[1] LI Xuping(Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学,内蒙古包头014010

出　　处：《煤炭技术》2022年第1期71-73,共3页Coal Technology

摘　　要：厚硬基本顶综放工作面开采强度高、基本顶厚度大,区段煤柱的稳定性直接影响着巷道的安全稳定,针对这一影响因素,采用理论分析、数值模拟的方法计算分析沿空巷道的覆岩结构特征及应力位移变化情况,确定合理煤柱宽度。结果表明:厚硬基本顶主要破断方式为两端拉断作用下破坏,计算得到巷道煤柱的留设宽度为7.5 m以上,分析了不同宽度煤柱下的垂直应力及形变量,最终确定煤柱合理留设宽度应为8 m。The mining intensity of fully mechanized top coal caving face with thick and hard basic roof is high, and the thickness of basic roof is large. The stability of section coal pillar directly affects the safety and stability of roadway. In view of this influencing factor, the overburden structure characteristics and stress displacement changes of gob side entry are calculated and analyzed by theoretical analysis and numerical simulation, and the reasonable coal pillar width is determined. The results show that the main breaking mode of thick and hard basic roof is under the action of two ends breaking, the reserved width of roadway coal pillar is calculated to be at least 7.5 m, the vertical stress and shape variables under different width coal pillars are analyzed, and the reasonable reserved width of coal pillar is determined to be 8 m.

关 键 词：厚硬基本顶 综放开采 沿空巷道 煤柱宽度 

分 类 号：TD323[矿业工程—矿井建设] TD822