【作者】 唐建新；

【导师】 鲜学福；

【作者基本信息】 重庆大学 ， 采矿工程， 2004， 博士

【摘要】 本文发现并提出了矿井非典型动力现象,对该现象进行了定义、表述了其特点、表现形式及危害性。论文深入研究了矿井非典型动力现象发生的机理,通过事故区原岩应力现场实测,煤(岩)物理力学性质实验室测定,采场地应力三维弹塑性有限元分析、各厚层坚硬顶板的初次及周期断裂步距计算,以及断裂岩块的平衡结构分析,认为在地质构造和采动影响下,具有特殊物理力学性质,位于弯曲下沉带最下位的“主关键层”的初次断裂失稳,摧毁了其下“砌体梁”平衡结构,是导致矿井非典型动力现象的最主要、最直接的原因,顶板岩层结构、原岩应力、“主关键层” 的冲击倾向性是影响矿井非典型动力现象发生的三大主要因素。论文根据矿井非典型动力现象发生的机理及三大主要影响因素的特点,运用模糊综合评判的原理和方法,建立了矿井非典型动力现象发生的数学模型:。又根据关键层理论,选择主关键层厚度、单轴抗压强度、相对高度以及直接顶厚与采高的比值四个指标来表述顶板岩层结构对矿井非典型动力现象的影响;原岩应力的影响可用两类指标来表述,一类是实测原岩应力,并计算主关键层的弹性变形能比值及采深;另一类是用地质构造痕迹结合采深来模糊综合评判原岩应力的影响,采用主关键层的弹性能指标、弹性变形指标、冲击能指标、刚度比指数和修正的冲击能指标等5项参数来表述主关键层的冲击倾向性影响。论文对以上各类指标的作用、测定方法、影响的隶属度及权值的确定原则均进行了研究,并建立了矿井非典型动力现象的评判方法。论文运用所建立的矿井非典型动力现象发生的数学模型,对白皎煤矿20112工作面事故区进行了评判,对该矿未采工作面(20132和20152两个工作面)进行了预测,其结果符合开采实践,说明本文对矿井非典型动力现象发生机理的认识,并据此建立的数学模型和创立的评判方法是恰当的。更多还原

【Abstract】 The atypical dynamic phenomena of mines, including its definition, danger, action forms and characteristics, are put forward in this paper. This paper researches the mechanism of the atypical dynamic phenomena in deeply. According to the practical measure of the original rock stress scene in the accident district and the character of the coal and rock in the laboratory, analyzing the original stress by program of the three-dimension finite element, the calculating of the first and cycle broken distance of each thick and hard roofs and the balance structure analyzing of the broken rock, this paper finds that the most primary and directive reason is the first broken of the main key stratum which is the first stratum of the bend sinkage strip and has the specific character by the influence of the geological conformation and the reap coal. This paper also finds that the three key factors affecting the phenomena are the structures of roof and floor and surrounding rock, initial stress and main key stratum’s rock burst tendency. According to the mechanism of the atypical dynamic phenomena and the three key factors’ characteristics, using the principle and way of fuzzy comprehensive judgments, the mathematical model about the phenomena of atypical strata behaviors in coal mine is built up in this paper as follows:S = K * Y = [k1 k2 k3] * [y1 y2 y3]TBasing on the key stratum theory, the four indexes which are the thickness of main key stratum, uniaxial compressive strength, relative height and the compared value between immediate roof thickness and mining height, are chosen to express that the roof structures influence upon the atypical dynamic phenomena. However, there are two ways to express the initial stress influences, the first is through testing initial stress and calculating elastic deformation energy compared value and mining height, the second is to use geology structural traces and mining height for fuzzily judging the initial stress influence. There are five indexes, which are main key stratum’ celestial energy index, rock burst energy index, rigidity ratio index and revised celestial energy index, to express main key stratum rock burst tendency influence. Above all indexes action, testing ways, influence membership degree and determined weight laws are researched, and put forward a new law for judging the atypical dynamic phenomena in coal mine. The mechanism about the atypical dynamic phenomena in coal mine are studied in this paper, and using the mathematical model to judge No. 20112 work face where the <WP=8>case had taken, No. 20132 and 20152 work faces which will be mined, and gotten some conclusion in Baijiao Coal Mine. Through mining facts to check, the result is right, which shows that the mathematical model and the judge method found in this paper is right.更多还原