大倾角工作面煤壁稳定性的云模型综合辨识  

Cloud model identification of coal face stability in steeply inclined working faces

作　　者：熊钰 孔德中[1] 杨胜利[2] 吴桂义[1] 左宇军[1] 程占博 XIONG Yu;KONG Dezhong;YANG Shengli;WU Guiyi;ZUO Yujun;CHENG Zhanbo(Mining College of Guizhou University,Guiyang Guizhou 550025,China;School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Engineering,University of Warwick,Coventry CV47AL,UK)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]中国矿业大学(北京)能源与矿业学院,北京100083 [3]华威大学工程学院,英国考文垂CV47AL

出　　处：《中国安全科学学报》2022年第3期144-151,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(51904082,52064005,52164002,52164005);贵州省科技计划项目(黔科合基础[2020]1Y214,黔科合支撑[2021]一般339)。

摘　　要：为保障大倾角工作面安全高效开采,基于层次分析法(AHP),建立带量化等级区间的大倾角煤壁稳定性评价指标体系;构建基于云理论的煤壁稳定性标准云模型;以3402大倾角工作面为例,生成煤壁稳定性评价云图,通过Dice系数计算评价云图与标准云模型各等级的相似度,辨识煤壁稳定性,验证该模型的科学性和有效性。结果表明:影响大倾角煤层煤壁稳定性的因素主要有一般倾角煤层的煤壁处顶板压力、煤体黏聚力和煤层采高,以及煤层倾角、工作面伪仰斜角等;经云模型辨识,3402工作面煤壁稳定性总指标评价云图与各标准等级相似度分别为0、0.3453、0.7872及0,该工作面煤壁稳定性处于Ⅲ级,呈不稳定状态,该结果与现场实际情况基本一致,证明文中所建模型具有一定的科学性和有效性。In order to ensure safe and efficient mining on steeply inclined working faces, a stability evaluation index system of steeply inclined coal faces was constructed with quantified grade intervals on the basis of AHP method. Then, a standard stability cloud model based on cloud theory was established. With working face 3402 as an example, its coal face stability evaluation cloud image was generated, and similarity between this image and grades of cloud model was calculated through Dice coefficient to effectively identify stability and verify scientificity and validity of the model. The results show that the main influencing factors of coal face stability in steeply inclined seams are roof pressure at the face of mildly inclined ones, coal body cohesion and mining height, as well as inclination angle of coal seam and pseudo-inclination angle of working face. According to cloud model’s identification, similarity between evaluation cloud image and standard grades for general stability indexes of 3402 working face is 0, 0.345 3, 0.787 2 and 0 respectively. It can be concluded that its stability is at level Ⅲ, an unstable state, which is basically consistent with actual situation, demonstrating that the proposed model is scientific and effective to some extent.

关 键 词：大倾角工作面 煤壁稳定性 云模型 层次分析法(AHP) 综合评价 

分 类 号：X936[环境科学与工程—安全科学]