沟谷区域浅埋厚煤层开采应力场分布及矿压显现特征  

Stress field distribution and strata behavior characteristics in shallow thick coal seam mining in gully region

作　　者：赵杰[1,2] 刘长友 李建伟[1] ZHAO Jie;LIU Changyou;LI Jianwei(School of Mines,State Key Laboratory of Coal Resources ＆ Safe Mining,China University of Mining ＆ Technology,Xuzhou,Jiangsu 221116,China;Inner Mongolia Zhunge＇er Qi Yunfei Mining Co Ltd,Ordos,Inner Mongolia 010400,China)

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]内蒙古准格尔旗云飞矿业有限责任公司,内蒙古鄂尔多斯010400

出　　处：《采矿与安全工程学报》2018年第4期742-750,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51574220); 中国矿业大学中央高校基本科研业务费专项资金项目(20142DPY21)

摘　　要：针对沟谷区域浅埋厚煤层开采工作面易发生动载矿压灾害的情况,采用数值模拟、理论分析与现场实测相结合,分析了沟谷地形下煤岩层原岩应力场分布特征与煤层开采期间覆岩应力场、位移场及工作面矿压显现规律。研究表明:沟谷地形对煤岩层原岩应力场的影响程度随煤岩层埋深的增大而减小,根据其对下覆煤岩层原岩应力场的影响程度的变化,可将沟谷地形下不同深度范围煤岩层分为显著影响区、影响减弱区和无影响区;工作面推进方向与沟谷沟底走向之间可分为平行、垂直和斜交3种情况,不同情况下工作面开采围岩应力场、位移场分布特征的不同,是引起工作面矿压显现差异化的根本原因。通过对沟谷地形下工作面矿压显现特征及支架承载特性的实测分析,对易出现动载矿压的情况进行了分类。For the situation of various factors affecting strata pressure in shallow thick coal seam mining in gully region,numerical simulations, theoretical analyses and field measurements are adopted to study the distribution characteristics of in-situ rock stress field, the distribution law of the stress, displacement field of overlying strata and the ground pressure behave law in coal seam mining in a valley terrain.The researches show that the influence of valley terrain on the in-situ rock stress field of coal and rock decreases with increasing of the buried depth. The coal and rock strata of different depth in the gully terrain can be divided into the significantly affected area, the influence weakened area and the uninfluenced area according to changes. The relationship between the gully toward and the advancing direction of a mining face can be divided into the parallel, perpendicular and oblique crossing. The primary cause of the difference of mining face pressure is the stress and displacement field distribution of surrounding rock under three different situations. The prone areas of dynamic strata pressure accidents are classified through the analysis of strata behavior characteristics and supports bearing properties of mining face in the gully terrain.

关 键 词：沟谷区域 浅埋厚煤层 FLAC^3D数值计算 应力场 动载矿压事故 

分 类 号：TD353[矿业工程—矿井建设]