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以鲍店煤矿十采区02工作面上覆200 m超厚高位红层砂岩为工程研究背景,分析建立了多工作面联合运动的超厚板力学模型,阐明了红层砂岩的损伤滑移破断规律,应用符拉索夫厚板理论,推导计算了红层砂岩的破断步距L=397.8 m。采用微矿震监测技术,分析验证了红层的破断规律及其动力响应特征。研究表明:未达到红层破断步距前,厚层砂岩板将在工作面平巷部位产生损伤,岩层仍处于稳定状态;工作面动力响应以小能级(小于105 J)的微震事件活动为主,在红层层位多发生在下表面。当红层悬露达到380 m时,初次破断运动;大能量(高于105 J)矿震事件频发,在平面上近似呈横向“O-X”型分布,在剖面上由红层下部逐渐向中部发展。红层最终呈现出四边铰接的稳定连续板状结构。
Based on the research background of overburden red sandstone overburden 200 in the No.2 mining face of Baodian Coal Mine, the mechanical model of super thick plate with multi-face joint movement was established and the damage and slip of the red sandstone were analyzed According to the law, the rupture step distance of red sandstone L = 397.8 m was deduced and calculated by using the Furasov thick slab theory. By using microseismic monitoring technology, the breaking law of red beds and the dynamic response characteristics are verified. The results show that the thick sandstone slab will be damaged in the laneway before the red layer is broken, and the rock formation is still stable. The microseismic event with small energy level (less than 105 J) Lord, at the red layer mostly occurs in the lower surface. The crustal movement of the red layer reaches 380 m for the first time. The large-magnitude (> 105 J) frequent earthquakes occur in the horizontal plane and are approximately “OX” -shaped in distribution. From the lower part of the red layer, Central development. The red layer eventually presents a stable, continuous, plate-like structure hinged at four sides.