大采高综放开采煤岩损伤统计力学模型  

Statistic-Mechanical Model for Coal Damage of Full-Mechanized Caving Mining with Large Mining Height

作　　者：高召宁[1,2] 孟祥瑞[1,2] 王向前[1,2] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《长江科学院院报》2011年第5期31-34,86,共5页Journal of Changjiang River Scientific Research Institute

基　　金："十一五"国家科技支撑计划重大项目(2008BAB36B01);高等学校博士学科点专项基金项目(200803610001);高等学校博士学科点专项基金项目新教师类(20093415120001);安徽省优秀青年科技基金资助项目(10040606Y31);淮南市科技项目(2009A05015)

摘　　要：根据特厚煤层大采高综放开采煤壁前方支承压力的分布特征,从煤岩内部缺陷的随机性分布特征出发,基于反映煤岩内部缺陷的微元强度服从韦布分布的概念,建立了支承压力作用下煤岩的损伤统计力学模型,确定了特厚煤层大采高综放面在煤壁片帮不影响生产的情况下的合理采高,并分析了特厚煤层大采高综放面合理采高与煤壁片帮程度、煤层内摩擦角、煤层内聚力和顶煤变形的关系。最后,通过工程实例分析,验证了该模型的合理性。A statistic-mechanical model of coal damage under abutment pressure is presented in this paper based on the concept that micro-unit strength which reflects the internal defect of coal obeys the Weibull distribution.The model is built on the premise of the random distribution of internal defect in coal and the distribution characteristics of abutment pressure in the front of full-mechanized caving mining with large mining height in ultra thick coal seam.According to the model,the reasonable mining height was determined for caving mining with large height in thick seam under normal mining conditions.The relationship of reasonable mining height respectively with rib spalling degree,internal friction angle,cohesion of coal and the deformation of top coal was also analyzed.Finally,the model was proved to be rational by engineering example analysis.

关 键 词：特厚煤层 大采高综放开采 损伤统计力学模型 合理采高 煤壁片帮 

分 类 号：TD823.254[矿业工程—煤矿开采]