高位厚硬岩层破断力学机制分析  

Mechanical mechanism of the fracture of high thick-and-hard overburden strata

作　　者：林韩祥 冯雪峰 张强勇[1] 段抗[2] 张修峰 刘传成 陈长鹏 赵钰[1] LIN Han-xiang;FENG Xue-feng;ZHANG Qiang-yong;DUAN Kang;ZHANG Xiu-feng;LIU Chuan-cheng;CHEN Chang-peng;ZHAO Yu(Institute of Geotechnical and Underground Engineering,Shandong University,Jinan,Shandong 250061,China;School of Civil Engineering,Shandong University,Jinan,Shandong 250061,China;Coal Industry Management Department,Shandong Energy Group Co.,Ltd.,Jinan,Shandong 250101,China)

机构地区：[1]山东大学岩土与地下工程研究院,山东济南250061 [2]山东大学土建与水利学院,山东济南250061 [3]山东能源集团有限公司煤炭产业管理部,山东济南250101

出　　处：《岩土力学》2025年第4期1264-1277,共14页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.42172292);泰山产业领军人才工程(No.tscx202408130);山东能源集团2022年揭榜挂帅项目(No.SNKJ2022A01-R26)。

摘　　要：煤炭是我国的主体能源,是国民经济的压舱石。内蒙古石拉乌素矿区因其特有的高位厚硬岩层赋存特征使得大能量矿震频发,严重制约着煤炭安全开采。大能量矿震的诱因是高位厚硬岩层破断,因此探明不良地质条件下高位厚硬岩层破断的力学机制已成为亟待解决的科技难题。以石拉乌素煤矿1206A工作面和1208工作面为研究背景,在Reissner厚板理论的基础上,考虑自重应力场的影响,推导了四边固支厚板的挠度、转角、剪力、弯矩和最大拉应力的解析计算公式;考虑水平地应力场及其转移的影响,建立了高位厚硬岩层破断判据,并基于MATLAB平台编制了厚硬覆岩初次破断步距的计算程序。最终,依托该程序系统研究了工作面宽度、覆岩厚度以及上覆荷载对厚硬覆岩初次破断步距的影响规律。Coal serves as the primary energy source in China,playing a crucial role in maintaining national economic stability.Due to the characteristic of high thick-and-hard overburden strata,strong mine tremors occur frequently in Shilawusu coal mine in Inner Mongolia,which seriously restricts the safe mining of coal.The primary cause of strong mine tremors is the fracture of high thick-and-hard overburden strata,making it imperative to investigate the mechanical mechanism of such fractures under adverse geological conditions.The study is conducted using the 1206A and 1208 panels of the Shilawusu coal mine as the research context.On the basis of Reissner theory and considering the influence of gravity stress field,the analytical formulas of deflection,rotational angle,shear force,bending moment,and maximum tensile stress of the thick plate with fixed supports on four sides are derived.Considering the influence of horizontal ground stress field and its transfer,the breaking criterion of the high thick-and-hard overburden strata is established,and a MATLAB-based calculation program for determining the initial fracture step distance of such strata is developed.Finally,the program was used to systematically study the influence of the panel width,overburden strata thickness and overburden load on the initial fracture step distance of the thick-and-hard overburden strata.

关 键 词：大能量矿震 高位厚硬岩层 Reissner厚板理论 水平地应力转移 破断判据 

分 类 号：TU452[建筑科学—岩土工程]